Toxicity of butylone and its enantiomers to Daphnia magna and its degradation/toxicity potential using advanced oxidation technologies.

Butylone (BTL) is a chiral synthetic cathinone available as a racemate and reported as contaminant in wastewater effluents. However, there are no studies on its impact on ecosystems and possible enantioselectivity in ecotoxicity. This work aimed to evaluate: (i) the possible ecotoxicity of BTL as racemate or its isolated (R)- and (S)- enantiomers using Daphnia magna; and (ii) the efficiency of advanced oxidation technologies (AOTs) in the removal of BTL and reduction of toxic effects caused by wastewaters. Enantiomers of BTL were obtained by liquid chromatography (LC) using a chiral semi-preparative column. Enantiomeric purity of each enantiomer was > 97 %. For toxicity assessment, a 9-day sub-chronic assay was performed with the racemate (at 0.10, 1.0 or 10 µg L-1) or each enantiomer (at 0.10 or 1.0 µg L-1). Changes in morphophysiological, behavioural, biochemical and reproductive endpoints were observed, which were dependent on the form of the substance and life stage of the organism (juvenile or adult). Removal rates of BTL in spiked wastewater (10 µg L-1) treated with different AOTs (ultraviolet, UV; ozonation, O3; and UV/O3) were similar and lower than 29 %. The 48 h D. magna acute toxicity assays demonstrated a reduction in the toxicity of the treated spiked effluents, but no differences were found amongst AOTs treatments. These results warn for the contamination and negative impact of BTL on ecosystems and highlight the need for efficient removal processes.

Spirulina-based carbon materials as adsorbents for drinking water taste and odor control: Removal efficiency and assessment of cyto-genotoxic effects.

The sensory quality of drinking water, and particularly its taste and odor (T&O) is a key determinant of consumer acceptability, as consumers evaluate water by their senses. Some of the conventional treatment processes to control compounds which impart unpleasant T&O have limitations because of their low efficiency and/or high costs. Therefore, there is a great need to develop an effective process for removing T&O compounds without secondary concerns. The primary objective of this study was to assess for the first time the effectiveness of spirulina-based carbon materials in removing geosmin (GSM) and 2-methylisoborneol (2-MIB) from water, two commonly occurring natural T&O compounds. The efficiency of the materials to remove environmentally relevant concentrations of GSM and 2-MIB (ng L-1) from ultrapure and raw water was investigated using a sensitive headspace solid-phase microextraction coupled with gas chromatography mass spectrometry (HS-SPME-GC/MS) method. Moreover, the genotoxic and cytotoxic effects of the spirulina-based materials were assessed for the first time to evaluate their safety and their potential in the treatment of water for human consumption. Based on the results, spirulina-based materials were found to be promising for drinking water treatment applications, as they did not exert geno-cytotoxic effects on human cells, while presenting high efficiency in removing GSM and 2-MIB from water.

Nursing care for parents who have experienced fetal demise: integrative review.

OBJECTIVES: to identify scientific evidence regarding nursing care for parents who have experienced grief following fetal demise. METHODS: an integrative review of original studies was conducted across six databases. The studies were classified according to the level of evidence. RESULTS: the qualitative analysis of the nine studies comprising the sample involved thematic categories, exploring the impact of perinatal loss on families, inadequate communication by healthcare professionals, and the importance of a holistic approach in care. The role of the nurse is highlighted in making a positive contribution to the team, emphasizing participation in training and the provision of essential information. FINAL CONSIDERATIONS: grieving affects not only family dynamics but also the social environment, emphasizing the urgency of a more empathetic and comprehensive approach. Care should be holistic, going beyond technical nursing assistance, and addressing the biopsychosocial context of the parents.

Continuing nursing education actions in the face of homophobia: an integrative review.

OBJECTIVES: to analyze continuing nursing education actions in the scientific literature in the face of homophobia. METHODS: an integrative literature review with structured search in June 2022 in eight databases, using the descriptors Nursing Education, Homophobia, Sexual and Gender Minorities. Final sample consisted of six primary studies. RESULTS: continuing nursing education actions are supported by strategies such as use of teaching materials, lectures, case studies and focus groups, addressing content such as gender identity issues and affective-sexual orientation, health disparities and their relationship with homophobia in healthcare settings. FINAL CONSIDERATIONS: carried out in various healthcare settings, continuing education actions proved to be successful in raising nurses' awareness in facing homophobia in health services, however, their expansion is necessary to create health spaces that meet the specific needs of these people.

Combining fungal bioremediation and ozonation for rinse wastewater treatment.

In this work, agricultural rinse wastewater, which is produced during the cleaning of agricultural equipment and constitutes a major source of pesticides, was treated by fungal bioremediation and ozonation, both individually and combined in a two-stage treatment train. Three major pesticides (thiacloprid, chlortoluron, and pyrimethanil) were detected in rinse wastewater, with a total concentration of 38.47 mg C L-1. Comparing both technologies, ozonation in a stirred reactor achieved complete removal of these pesticides (720 min) while proving to be a more effective approach for reducing colour, organic matter, and bacteria. However, this technique produced transformation products and increased toxicity. In contrast, fungal bioremediation in a rotating drum bioreactor attenuated toxicity levels and did not produce such metabolites, but only removed approximately 50 % of target pesticide - hydraulic retention time (HRT) of 5 days - and obtained worse results for most of the general quality parameters studied. This work also includes a preliminary economic assessment of both technologies, revealing that fungal bioremediation was 2 times more cost-effective than ozonation. The treatment train, consisting of a first stage of fungal bioremediation followed by ozonation, was found to be a promising approach as it synergistically combines the advantages of both treatments, achieving high removals of pesticides (up to 100 %) and transformation products, while reducing operating costs and producing a biodegradable effluent. This is the first time that fungal bioremediation and ozonation technologies have been compared and combined in a treatment train to deal with pesticides in agricultural rinse wastewater.

Continuing nursing education actions in the face of homophobia: an integrative review / Acciones de educación permanente en enfermería frente a la homofobia: una revisión integradora / Ações de educação permanente da enfermagem frente à homofobia: uma revisão integrativa

ABSTRACT Objectives: to analyze continuing nursing education actions in the scientific literature in the face of homophobia. Methods: an integrative literature review with structured search in June 2022 in eight databases, using the descriptors Nursing Education, Homophobia, Sexual and Gender Minorities. Final sample consisted of six primary studies. Results: continuing nursing education actions are supported by strategies such as use of teaching materials, lectures, case studies and focus groups, addressing content such as gender identity issues and affective-sexual orientation, health disparities and their relationship with homophobia in healthcare settings. Final considerations: carried out in various healthcare settings, continuing education actions proved to be successful in raising nurses' awareness in facing homophobia in health services, however, their expansion is necessary to create health spaces that meet the specific needs of these people.

RESUMEN Objetivos: analizar las acciones de educación continua en enfermería en la literatura científica frente a la homofobia. Métodos: revisión integrativa de la literatura con búsqueda estructurada en junio de 2022 en ocho bases de datos, utilizando los descriptores Nursing Education, Homophobia, Sexual and Gender Minorities. La muestra final estuvo compuesta por seis estudios primarios. Resultados: las acciones de educación continua en enfermería se apoyan en estrategias como el uso de materiales didácticos, conferencias, estudios de casos y grupos focales, abordando contenidos como cuestiones de identidad de género y orientación afectivo-sexual, disparidades en salud y su relación con la homofobia en el ámbito de la salud. Consideraciones finales: realizadas en diversos ámbitos de atención de salud, las acciones de educación continua demostraron ser exitosas en la sensibilización de los enfermeros para enfrentar la homofobia en los servicios de salud, sin embargo, su ampliación es necesaria para crear espacios de salud que atiendan las necesidades específicas de estas personas.

RESUMO Objetivos: analisar na literatura científica ações de educação permanente da enfermagem frente à homofobia. Métodos: revisão integrativa da literatura com busca estruturada em junho de 2022 em oito bases de dados, utilizando os descritores Nursing Education, Homophobia, Sexual and Gender Minorities. Amostra final foi composta por seis estudos primários. Resultados: as ações de educação permanente da enfermagem apoiam-se em estratégias como utilização de materiais didáticos, palestras, estudos de casos e grupos focais, com abordagem de conteúdos como questões identitárias de gênero e de orientação afetivossexual, disparidades de saúde e sua relação com a homofobia nos locais de cuidados de saúde. Considerações finais: realizadas em variados cenários de cuidados de saúde, as ações de educação permanente mostraram-se exitosas quanto à sensibilização dos enfermeiros no enfrentamento da homofobia nos serviços de saúde, sendo necessária, no entanto, sua ampliação para a criação de espaços de saúde que atendam às necessidades específicas dessas pessoas.

Nursing care for parents who have experienced fetal demise: integrative review / Cuidado de enfermería a padres que han experimentado la pérdida fetal: revisión integradora / O cuidado de enfermagem aos pais que vivenciaram o óbito fetal: revisão integrativa

ABSTRACT Objectives: to identify scientific evidence regarding nursing care for parents who have experienced grief following fetal demise. Methods: an integrative review of original studies was conducted across six databases. The studies were classified according to the level of evidence. Results: the qualitative analysis of the nine studies comprising the sample involved thematic categories, exploring the impact of perinatal loss on families, inadequate communication by healthcare professionals, and the importance of a holistic approach in care. The role of the nurse is highlighted in making a positive contribution to the team, emphasizing participation in training and the provision of essential information. Final Considerations: grieving affects not only family dynamics but also the social environment, emphasizing the urgency of a more empathetic and comprehensive approach. Care should be holistic, going beyond technical nursing assistance, and addressing the biopsychosocial context of the parents.

RESUMEN Objetivos: identificar evidencia científica sobre el cuidado de enfermería a padres que han experimentado el duelo ante la pérdida fetal. Métodos: revisión integradora de estudios originales realizada en seis bases de datos y clasificados según el nivel de evidencia. Resultados: el análisis cualitativo de los nueve estudios que conformaron la muestra abordó categorías temáticas, explorando el impacto de la pérdida perinatal en las familias, la comunicación inadecuada por parte de los profesionales de la salud y la importancia de un enfoque holístico en la atención. Se destaca la importancia del papel del enfermero en la contribución positiva al equipo, haciendo hincapié en la participación en capacitaciones y la provisión de información esencial. Consideraciones Finales: la experiencia del duelo afecta no solo la dinámica familiar, sino también el entorno social, evidenciando la urgencia de un enfoque más empático y comprensivo. El cuidado debe ser holístico, trascendiendo la asistencia técnica de enfermería, con un enfoque en el contexto biopsicosocial de los padres.

RESUMO Objetivos: identificar evidências científicas acerca do cuidado de enfermagem aos pais que vivenciaram o luto diante do óbito fetal. Métodos: revisão integrativa de estudos originais realizada em seis bases de dados e classificados quanto ao nível de evidência. Resultados: a análise qualitativa dos nove estudos que compuseram a amostra envolveu categorias temáticas, explorando o impacto da perda perinatal nas famílias, a comunicação inadequada por parte dos profissionais de saúde e a importância de uma abordagem holística na assistência. Destaca-se a importância do papel do enfermeiro na contribuição positiva para a equipe, enfatizando a participação em capacitações e o fornecimento de informações essenciais. Considerações Finais: a vivência do luto impacta não apenas a dinâmica familiar, mas o meio social, evidenciando a urgência de uma abordagem mais empática e compreensiva. O cuidado deve ocorrer de forma holística, transcendendo a assistência técnica de enfermagem, com abordagem do contexto biopsicossocial dos pais.

Nanofiltration combined with ozone-based processes for the removal of antineoplastic drugs from wastewater effluents.

Over the past years, there has been an increasing concern about the occurrence of antineoplastic drugs in water bodies. The incomplete removal of these pharmaceuticals from wastewaters has been confirmed by several scientists, making it urgent to find a reliable technique or a combination of techniques capable to produce clean and safe water. In this work, the combination of nanofiltration and ozone (O3)-based processes (NF + O3, NF + O3/H2O2 and NF + O3/H2O2/UVA) was studied aiming to produce clean water from wastewater treatment plant (WWTP) secondary effluents to be safely discharged into water bodies, reused in daily practices such as aquaculture activities or for recharging aquifers used as abstraction sources for drinking water production. Nanofiltration was performed in a pilot-scale unit and O3-based processes in a continuous-flow column. The peroxone process (O3/H2O2) was considered the most promising technology to be coupled to nanofiltration, all the target pharmaceuticals being removed at an extent higher than 98% from WWTP secondary effluents, with a DOC reduction up to 92%. The applicability of the clean water stream for recharging aquifers used as abstraction sources for drinking water production was supported by a risk assessment approach, regarding the final concentrations of the target pharmaceuticals. Moreover, the toxicity of the nanofiltration retentate, a polluted stream generated from the nanofiltration system, was greatly decreased after the application of the peroxone process, which evidences the positive impact on the environment of implementing a NF + O3/H2O2 process.

Novel photoelectrochemical 3D-system for water disinfection by deposition of modified carbon nitride on vitreous carbon foam.

Graphitic carbon nitride (GCN) is an optical semiconductor with excellent photoactivity under visible light irradiation. It has been widely applied for organic micropollutant removal from contaminated water, and less investigated for microorganisms' inactivation. The photocatalytic degradation mechanism using GCN is attributed to a series of reactions with reactive oxygen species and photogenerated holes that can be boosted by modifying its physical-chemical structure. This work reports a successful improvement of the overall photocatalytic and electrocatalytic activities of the pristine material by thermal and chemical modification by a copolymerisation synthesis method. The copolymerisation of dicyandiamide as a precursor with barbituric acid strongly reduced photoluminescence due to the enhanced charge separation thus improving the catalyst efficiency under visible light irradiation. The material with 1.6 wt% of barbituric acid showed the best photocatalytic performance and electrochemical properties. This photocatalyst was selected for immobilisation on a conductive carbon foam, which promotes a higher electrochemical active surface area and enhanced mass transfer. This three-dimensional metal-free electrode was employed for the photoelectrochemical inactivation of two different microorganisms, Escherichia coli, and Enterococcus faecalis, obtaining removals below the detection limit after 30 min in simulated faecal-contaminated waters. This photoelectrochemical reactor was also applied to treat polluted river and urban waste waters, and the faecal contamination indicators were vastly reduced to values below the detection limit in 60 min in both cases, showing the wide applicability of this innovative photoelectrode for different types of polluted aqueous matrices.

Antineoplastic drugs in urban wastewater: Occurrence, nanofiltration treatment and toxicity screening.

Antineoplastic drugs are pharmaceuticals that have been raising concerns among the scientific community due to: (i) their increasing prescription in the fight against the disease of the twentieth century (cancer); (ii) their recalcitrance to conventional wastewater treatments; (iii) their poor environmental biodegradability; and (iv) their potential risk to any eukaryotic organism. This emerges the urgency in finding solutions to mitigate the entrance and accumulation of these hazardous chemicals in the environment. Advanced oxidation processes (AOPs) have been taken into consideration to improve the degradation of antineoplastic drugs in wastewater treatment plants (WWTPs), but the formation of by-products that are more toxic or exhibit a different toxicity profile than the parent drug is frequently reported. This work evaluates the performance of a nanofiltration pilot unit, equipped with a Desal 5DK membrane, in the treatment of real WWTP effluents contaminated (without spiking) with eleven pharmaceuticals, five of which were never studied before. Average removals of 68 ± 23% were achieved for the eleven compounds, with decreasing risks from feed to permeate for aquatic organisms from receiving waterbodies (with the exception of cyclophosphamide, for which a high risk was estimated in the permeate). Aditionally, no significative impact on the growth and germination of three different seeds (Lepidium sativum, Sinapis alba, and Sorghum saccharatum) were determined for permeate matrix in comparison to the control.

Multi-target analysis of cytostatics in hospital effluents over a 9-month period.

The consumption of cytostatics, pharmaceuticals prescribed in chemotherapy, is increasing every year and worldwide, along with the incidence of cancer. The presence and the temporal evolution of cytostatics in wastewaters from a Portuguese hospital center was evaluated through a 9-month sampling campaign, comprising a total of one hundred and twenty-nine samples, collected from May 2019 to February 2020. Eleven cytostatics out of thirteen pharmaceuticals were studied, including flutamide, mycophenolate mofetil and mycophenolic acid, which have never been monitored before. Target analytes were extracted and quantified by solid-phase extraction coupled to liquid-chromatography-tandem mass spectrometry analysis; the method was fully validated. All pharmaceuticals were detected in at least one sample, bicalutamide being the one found with higher frequency (detected in all samples), followed by mycophenolic acid, which was also the compound detected at higher concentrations (up to 5340 ± 211 ng/L). Etoposide, classified as carcinogenic to humans, was detected in 60% of the samples at concentrations up to 142 ± 15 ng/L. The risk from exposure to cytostatics was estimated for aquatic organisms living in receiving bodies. Cyclophosphamide, doxorubicin, etoposide, flutamide, megestrol and mycophenolic acid are suspected to induce risk. Long-term and synergic effects should not be neglected, even for the cytostatics for which no risk was estimated.

Per- and Poly-Fluoroalkyl Substances in Portuguese Rivers: Spatial-Temporal Monitoring.

Eighteen per-and polyfluoroalkyl substances (PFASs) were investigated in surface waters of four river basins in Portugal (Ave, Leça, Antuã, and Cértima) during the dry and wet seasons. All sampling sites showed contamination in at least one of the seasons. In the dry season, perfluorooctanoate acid (PFOA) and perfluoro-octane sulfonate (PFOS), were the most frequent PFASs, while during the wet season these were PFOA and perfluobutane-sulfonic acid (PFBS). Compounds detected at higher concentrations were PFOS (22.6 ng L-1) and perfluoro-butanoic acid (PFBA) (22.6 ng L-1) in the dry and wet seasons, respectively. Moreover, the prospective environmental risks of PFASs, detected at higher concentrations, were evaluated based on the Risk Quotient (RQ) classification, which comprises acute and chronic toxicity. The results show that the RQ values of eight out of the nine PFASs were below 0.01, indicating low risk to organisms at different trophic levels in the four rivers in both seasons, wet and dry. Nevertheless, in the specific case of perfluoro-tetradecanoic acid (PFTeA), the RQ values calculated exceeded 1 for fish (96 h) and daphnids (48 h), indicating a high risk for these organisms. Furthermore, the RQ values were higher than 0.1, indicating a medium risk for fish, daphnids and green algae (96 h).

Tecnologias educacionais em saúde para adolescentes e jovens lgbti+: revisão integrativa / Tecnologías educativas en salud para adolescentes y jóvenes lgbti+: revisión integradora / Educational technologies in health for adolescent and young lgbti+: integrative review

RESUMO Objetivo: analisar o desenvolvimento e o uso de tecnologias educacionais em saúde para adolescentes e jovens lésbicas, gays, bissexuais, travestis, transexuais, pessoas intersexo e mais da diversidade sexual e de gênero (LGBTI+). Método: revisão integrativa de literatura, conduzida pela estratégia PICo, com busca nas bases de dados: MEDLINE via PubMed, CINAHL, Embase, Scopus, LILACS e Web of Scienceatualizadaem abril e maio de 2023. Na etapa de seleção, o levantamento bibliográfico foi organizado pelo gerenciador de referências Mendeley® com auxílio do software colaborativo em revisões Rayyan®. Resultados: onze artigos compuseram a amostra final, evidenciando o uso de programas de intervenções virtuais, do vídeo interativo e a utilização de grupos focais e fóruns de discussão virtual como recursos significativos desenvolvidos como intervenções em saúde digital para adolescentes e jovens LGBTI+. Considerações Finais: as tecnologias analisadas têm potencial para lhes alcançar de modo consistente, apoiando seus processos de conhecimento e as tomadas de decisões sobre sua saúde, sendo fontes significativas de informação e aprendizagem, com o acesso virtual representando uma oportunidade-chave no contexto da saúde digital. Recomendam-se fontes digitais de base científica nos cuidados à saúde de adolescentes e jovens LGBTI+.

RESUMEN Objetivo: analizar el desarrollo y uso de tecnologías educativas en salud para adolescentes y jóvenes lesbianas, gays, bisexuales, travestís, transexuales, personas intersexuales y más de la diversidad sexual y de género (LGBTI+). Método: revisión integradora de la literatura, conducida por la estrategia PICo, con búsqueda en las bases de datos: MEDLINE vía PubMed, CINAHL, Embase, Scopus, LILACS y Web ofScience actualizada en abril y mayo de 2023. En la etapa de selección, el estudio bibliográfico fue organizado por el gestor de referencias Mendeley® con ayuda del software colaborativo en revisiones Rayyan®. Resultados: once artículos compusieron la muestra final, evidenciando el uso de programas de intervenciones virtuales, del vídeo interactivo y la utilización de grupos focales y foros de discusión virtual como recursos significativos desarrollados como intervenciones en salud digital para adolescentes y jóvenes LGBTI+. Consideraciones finales: las tecnologías analizadas tienen potencial para alcanzarles de manera consistente, apoyando sus procesos de conocimiento y las decisiones sobre su salud, siendo fuentes significativas de información y aprendizaje, con el acceso virtual representando una oportunidad clave en el contexto de la salud digital. Se recomiendan fuentes digitales de base científica en el cuidado de la salud de adolescentes y jóvenes LGBTI+.

ABSTRACT Objective: to analyze the development and use of educational health technologies for adolescent and young lesbians, gays, bisexuals, transvestites, transsexuals, intersex people and more of sexual and gender diversity (LGBTI+). Method: integrative literature review, conducted by the PICo strategy, with search in the databases: MEDLINE via PubMed, CINAHL, Embase, Scopus, LILACS and Web of Science updated in April and May 2023. In the selection stage, the bibliographic survey was organized by the reference manager Mendeley® with the aid of collaborative software in Rayyan®. Results: eleven articles composed the final sample, evidencing the use of virtual the use of focus groups and virtual discussion forums as significant resources developed as digital health interventions for adolescent and young LGBTI+. Final Thoughts: the technologies analyzed have the potential to reach them consistently, supporting their knowledge processes and decision making about their health, being significant sources of information and learning, with virtual access representing a key opportunity in the context of digital health. Scientific-based digital sources are recommended in the health care of adolescent and young LGBTI+.

The "DrownSafe" Project: Assessing the Feasibility of a Puppet Show in Teaching Drowning Prevention to Children and Parents.

Drowning remains a prominent global pediatric health concern, necessitating preventive measures such as educational initiatives for children and caregivers. In this study, we aimed to assess the feasibility and educational effectiveness of an interactive puppet show centered on teaching water safety to children and parents. A 30 min original theater performance, featuring two actors and three puppets (a girl, a crab, and a lifeguard), was conducted. Subsequently, 185 children (aged 4 to 8) and their 160 parents (134 mothers and 26 fathers) participated in this quasi-experimental study. Pre- and post-show tests were administered to evaluate knowledge and behaviors regarding aquatic environments. Prior to the puppet show, 78% of the children exhibited basic aquatic competency. Only 33% considered swimming alone risky. Following the intervention, 81.6% of the children changed their perception of the risks of solo beach activities, showing improved knowledge regarding contacting an emergency number (from 63.2% to 98.9%, p < 0.001). The intervention increased parents' intention to visit lifeguard-patrolled beaches and improved their CPR knowledge with regard to drowning victims by 58.8%. In conclusion, a drowning prevention puppet show positively impacted children and parents, potentially enhancing safety behaviors during water-related leisure activities, warranting its consideration part of comprehensive drowning prevention strategies.

Are cytostatic drugs in surface waters a potential threat?

Cytostatic drugs are pharmaceuticals administered to cancer patients under chemotherapy. Their occurrence in surface waters has been reported worldwide, increasing environmental and human health concerns. This work addresses a question of worldwide interest: are these hazardous pharmaceuticals in surface waters a potential threat? For the first time, this study brings information on the presence of cytostatic drugs in Portuguese rivers. Furthermore, cutting-edge data on the occurrence of two cytostatic drugs is provided; up to the authors' best knowledge, flutamide and mycophenolate mofetil have never been monitored in worldwide surface waters. Nine out of thirteen cytostatic drugs were detected in Portuguese rivers. Despite bicalutamide being the cytostatic most frequently detected, the highest concentration was recorded for cyproterone (19 ± 3 ng/L). Three different scenarios were considered to estimate the risks from the exposure of humans to cytostatic drugs via surface waters. Two scenarios are associated with bathing practices in rivers, particularly in the spring and summer seasons (river beaches): (i) the exposure to cytostatic drugs by dermal contact with contaminated water and (ii) the exposure by accidental ingestion of contaminated water, which is less likely but also occurs. The third exposure scenario is related to (iii) the long-life consumption of drinking water produced from river water capture, under worst-case conditions, i.e. negligible degradation of cytostatic drugs at drinking water treatment plants. It was concluded that the third exposure context to cytostatics could represent a risk to children, if the highest concentration ever reported in the literature for cyclophosphamide in surface waters is considered. Still, attending to the carcinogenicity of some of these compounds (e.g., cyclophosphamide, chlorambucil, etoposide and tamoxifen), health risks might always be expected, regardless of the contamination level. Furthermore, health risks associated with synergic effects and/or long-term exposures cannot be ruled out, even for the remaining cytostatics/exposure contexts.

Can aged microplastics be transport vectors for organic micropollutants? - Sorption and phytotoxicity tests.

Microplastics have been investigated over the last decade as potential transport vectors for other pollutants. However, the specific role of plastic aging, in which plastics change their characteristics over time when exposed to environmental agents, has been overlooked. Therefore, sorption experiments were herein conducted using virgin and aged (by ozone treatment or rooftop weathering) microplastic particles of LDPE - low-density polyethylene, PET - poly(ethylene terephthalate), or uPVC - unplasticized poly(vinyl chloride). The organic micropollutants (OMPs) selected as sorbates comprise a diversified group of priority substances and contaminants of emerging concern, including pharmaceutical substances (florfenicol, trimethoprim, diclofenac, tramadol, citalopram, venlafaxine) and pesticides (alachlor, clofibric acid, diuron, pentachlorophenol), analyzed at trace concentrations (each ≤100 µg L-1). Sorption kinetics and equilibrium isotherms were obtained, as well as the confirmation that the aging degree of microplastics plays a major role in their sorption capacities. The results show an increased sorption of several OMPs on aged microplastics when compared to pristine samples, i.e. the sorption capacity increasing from one or two sorbed substances (maximum 3 µg g-1 per sorbate) up to nine after aging (maximum 10 µg g-1 per sorbate). The extent of sorption depends on the OMP, polymer and the effectiveness of the aging treatment. The modifications (e.g. in the chemical structure) between virgin and aged microplastics were linked to the increased sorption capacity of certain OMPs, allowing to better understand the different affinities observed. Additionally, phytotoxicity tests were performed to evaluate the mobility of the OMPs sorbed on the microplastics and the potential effects (on germination and early growth) of the combo on two species of plants (Lepidium sativum and Sinapis alba). These tests suggest low or no phytotoxicity effect under the conditions tested but indicate a need for further research on the behavior of microplastics on soil-plant systems.

Intensification strategies for cytostatics degradation by ozone-based processes in aqueous phase.

Over the past decade there has been an increasing concern on the presence of cytostatics (also known as anticancer drugs) in natural waterbodies. The conventional wastewater treatments seem not to be effective enough to remove them, and therefore new processes must be considered. This work investigates the performance of ozonation (O3), catalytic ozonation (O3/Fe2+) and peroxone (O3/H2O2) processes, under dark or UV radiation conditions, for the degradation of cytostatics of worldwide concern. The degradation of bicalutamide (a representative of recalcitrant cytostatics) was firstly assessed in batch and then in a tubular column reactor (continuous flow mode runs) using a wastewater treatment plant (WWTP) secondary effluent. Bicalutamide removal ranged between 66 % (O3) and 98 % (O3/H2O2/UV) in continuous flow mode runs, the peroxone process being the most effective. The performance of these processes was then assessed against a mixture of twelve cytostatics of worldwide concern spiked in the WWTP effluent (25-350 ng/L). After treatment, seven cytostatics were completely removed, whereas the five most recalcitrant ones were eliminated to an extent of 8-92 % in O3/H2O2, and 44-95 % in O3/H2O2/UV. Phytotoxicity tests revealed a noticeable reduction in the effluent toxicity, demonstrating the feasibility of these processes in realistic conditions as tertiary treatment.

G Protein-Coupled Receptors as Potential Intercellular Communication Mediators in Trypanosomatidae.

Detection and transduction of environmental signals, constitute a prerequisite for successful parasite invasion; i.e., Leishmania transmission, survival, pathogenesis and disease manifestation and dissemination, with diverse molecules functioning as inter-cellular signaling ligands. Receptors [i.e., G protein-coupled receptors (GPCRs)] and their associated transduction mechanisms, well conserved through evolution, specialize in this function. However, canonical GPCR-related signal transduction systems have not been described in Leishmania, although orthologs, with reduced domains and function, have been identified in Trypanosomatidae. These inter-cellular communication means seem to be essential for multicellular and unicellular organism's survival. GPCRs are flexible in their molecular architecture and may interact with the so-called receptor activity-modifying proteins (RAMPs), which modulate their function, changing GPCRs pharmacology, acting as chaperones and regulating signaling and/or trafficking in a receptor-dependent manner. In the skin, vasoactive- and neuro- peptides released in response to the noxious stimuli represented by the insect bite may trigger parasite physiological responses, for example, chemotaxis. For instance, in Leishmania (V.) braziliensis, sensory [Substance P, SP, chemoattractant] and autonomic [Vasoactive Intestinal Peptide, VIP, and Neuropeptide Y, NPY, chemorepellent] neuropeptides at physiological levels stimulate in vitro effects on parasite taxis. VIP and NPY chemotactic effects are impaired by their corresponding receptor antagonists, suggesting that the stimulated responses might be mediated by putative GPCRs (with essential conserved receptor domains); the effect of SP is blocked by [(D-Pro 2, D-Trp7,9]-Substance P (10-6 M)] suggesting that it might be mediated by neurokinin-1 transmembrane receptors. Additionally, vasoactive molecules like Calcitonin Gene-Related Peptide [CGRP] and Adrenomedullin [AM], exert a chemorepellent effect and increase the expression of a 24 kDa band recognized in western blot analysis by (human-)-RAMP-2 antibodies. In-silico search oriented towards GPCRs-like receptors and signaling cascades detected a RAMP-2-aligned sequence corresponding to Leishmania folylpolyglutamate synthase and a RAMP-3 aligned protein, a hypothetical Leishmania protein with yet unknown function, suggesting that in Leishmania, CGRP and AM activities may be modulated by RAMP- (-2) and (-3) homologs. The possible presence of proteins and molecules potentially involved in GPCRs cascades, i.e., RAMPs, signpost conservation of ancient signaling systems associated with responses, fundamental for cell survival, (i.e., taxis and migration) and may constitute an open field for description of pharmacophores against Leishmania parasites.

Antibiotics removal from aquaculture effluents by ozonation: chemical and toxicity descriptors.

Antibiotics are often applied in aquaculture to prevent fish diseases. These substances can cause disturbances on receiving waters, when not properly eliminated from the aquaculture effluents. In this work, ozone (O3) was investigated as a possible oxidizing agent to remove fishery antibiotics from aquaculture effluents: florfenicol (FF), oxytetracycline (OTC), sulfadimethoxine (SDM), sulfamethoxazole (SMX), and trimethoprim (TMP). Batch experiments were performed using ultrapure water and aquaculture effluents spiked with a mixture of target antibiotics at relatively high concentrations (10 mg L-1 each). OTC, SMX and TMP were fully removed (< 30 min) regardless of the tested conditions, mainly by O3 direct attack. In contrast, FF was partially removed in 30 min (∼ 10 and 60%, in aquaculture effluents and ultrapure water, respectively), but only in the presence of hydroxyl radicals (HO•), the FF concentrations reaching levels below the detection limits in ultrapure water after 60 min. In the case of SDM, its degradation was highly influenced by the selected water matrix, but with removals always higher than 68%. In continuous-flow experiments applying more environmentally relevant antibiotic concentrations (100 ng L-1 each) and low O3 doses (1.5 mg L-1), ozonation highly removed (> 98%) all tested antibiotics from aquaculture effluents with a hydraulic retention time (HRT) of 10 min, except FF (68%). Although by-products were detected in treated samples, zebrafish (Danio rerio) embryotoxicity tests did not show a toxicity increase by applying this ozonation treatment. Ozonation is thus a possible solution to remove antibiotics from aquaculture effluents. Still, full-scale studies in aquaculture farms are needed, and generation of HO• may be favoured to readily oxidize the FF antibiotic.