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3.
PLoS One ; 19(6): e0304351, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38838037

RESUMEN

INTRODUCTION: Almost all patient-reported outcomes measures (PROMs) are text-based, which impedes accurate completion by low and limited literacy patients. Few PROMs are designed or validated to be self-administered, either in clinical or research settings, by patients of all literacy levels. We aimed to adapt the Patient Reported Outcomes Measurement Information System Upper Extremity Short Form (PROMIS-UE) to a multimedia version (mPROMIS-UE) that can be self-administered by hand and upper extremity patients of all literacy levels. METHODS: Our study in which we applied the Multimedia Adaptation Protocol included seven phases completed in a serial, iterative fashion: planning with our community advisory board; direct observation; discovery interviews with patients, caregivers, and clinic staff; ideation; prototyping; member-checking interviews; and feedback. Direct observations were documented in memos that underwent rapid thematic analysis. Interviews were audio-recorded and documented using analytic memos; a rapid, framework-guided thematic analysis with both inductive and deductive themes was performed. Themes were distilled into design challenges to guide ideation and prototyping that involved our multidisciplinary research team. To assess completeness, credibility, and acceptability we completed additional interviews with member-checking of initial findings and consulted our community advisory board. RESULTS: We conducted 12 hours of observations. We interviewed 17 adult English-speaking participants (12 patients, 3 caregivers, 2 staff) of mixed literacy. Our interviews revealed two distinct user personas and three distinct literacy personas; we developed the mPROMIS-UE with these personas in mind. Themes from interviews were distilled into four broad design challenges surrounding literacy, customizability, convenience, and shame. We identified features (audio, animations, icons, avatars, progress indicator, illustrated response scale) that addressed the design challenges. The last 6 interviews included member-checking; participants felt that the themes, design challenges, and corresponding features resonated with them. These features were synthesized into an mPROMIS-UE prototype that underwent rounds of iterative refinement, the last of which was guided by recommendations from our community advisory board. DISCUSSION: We successfully adapted the PROMIS-UE to an mPROMIS-UE that addresses the challenges identified by a mixed literacy hand and upper extremity patient cohort. This demonstrates the feasibility of adapting PROMs to multimedia versions. Future research will include back adaptation, usability testing via qualitative evaluation, and psychometric validation of the mPROMIS-UE. A validated mPROMIS-UE will expand clinicians' and investigators' ability to capture patient-reported outcomes in mixed literacy populations.


Asunto(s)
Alfabetización , Multimedia , Medición de Resultados Informados por el Paciente , Humanos , Femenino , Masculino , Persona de Mediana Edad , Adulto , Anciano , Alfabetización en Salud
4.
Minerva Pediatr (Torino) ; 76(3): 372-380, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38842381

RESUMEN

BACKGROUND: Nowadays children live in a digital world, exposed to relevant risks for their health and safety. The aim of this study is to investigate the use of multimedia devices in a sample of children and adolescents. METHODS: The study was performed between November 2018 and June 2019 in a third-level University Hospital, recruiting children and adolescents during general or specialistic follow-up visits. Anonymous, age-specific, questionnaires were distributed to 500 children and adolescents and 370 parents. RESULTS: Among children, 25 (17.1%) had their own mobile device, of which 84% Italian. The 54.1% of them uses multimedia devices half an hour/an hour per day and many of them (37.5% of Italian and 40% of foreign) use it without their parents' control. Most of adolescents had a mobile phone since the age of 10-12 years old. WhatsApp (Meta Inc., Cambridge, MA, USA) is the most used social network, followed by Instagram and Facebook. The use of multimedia devices was widespread between teenagers during classroom hours, meals and before sleeping and they are an important mean for cyberbullying. In addition, in the 29.9% of cases there is no correspondence between information given by parents and respective sons/daughters. CONCLUSIONS: This study shows more risks than advantages derived from the use of multimedia devices in children and adolescents. Therefore, it is essential to educate them about their correct and responsible use.


Asunto(s)
Multimedia , Humanos , Niño , Adolescente , Italia , Femenino , Masculino , Encuestas y Cuestionarios , Teléfono Celular/estadística & datos numéricos , Padres/educación , Ciberacoso/estadística & datos numéricos , Medios de Comunicación Sociales , Hospitales Universitarios
5.
J Foot Ankle Res ; 17(3): e12018, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38943458

RESUMEN

BACKGROUND: Medical students face the challenge of learning vast amounts of complex information. Existing research suggests improved learning outcomes using multimedia resources but reports on their impact on podiatric education are scarce. To explore the potential of multimedia-based learning tools in enriching medical education, this study examined the impact of Osmosis, a platform featuring interactive videos, flashcards, and self-assessment quizzes on podiatric medical student outcomes. METHODS: This quasi-experimental study examined the impact of Osmosis, a multimedia learning platform with videos, flashcards, and quizzes, on podiatric medical students' learning outcomes. Two cohorts (T = Osmosis access, N = 86; C = no access, N = 87) took Pharmacology and Podiatric Medicine courses consecutively. Final exam scores, final course grades, platform usage metrics (median weekly videos watched, flashcards, and quizzes), and student experience surveys were analyzed. RESULTS: Analyses revealed no statistically significant differences in final exam scores between the groups in Pharmacology and Podiatric Medicine. While the treatment group exhibited a slight upward trend, further research is required for conclusive evidence. Student perceptions of Osmosis were overwhelmingly positive, with 90.2% of students agreeing that it facilitated concept learning and understanding compared to 54.9% for the textbook. Similarly, 80.4% of the treatment group felt that Osmosis enhanced their test performance, exceeding the 54.9% recorded for the textbook. Correlation analysis indicates a plausible connection between platform usage and academic success, as reflected by moderate positive correlations (r = [0.14, 0.28]) with final grades. Logistic regression analysis revealed that students with Osmosis access were 2.88 times more likely to score 90% or higher on the Pharmacology final exam (p < 0.05) and exhibited increased odds of achieving high (90%+) final course grades in Podiatric Medicine (OR = 2.71). CONCLUSIONS: These findings suggest that Osmosis holds promise as a tool to support podiatric medical student learning. While the lack of statistically significant differences in final exam scores warrants further investigation, the positive student perceptions, high engagement rates, and increased odds of high scores in specific areas indicate the potential for Osmosis to positively impact academic outcomes. Therefore, a multimedia-based resource like Osmosis appears to show promise as a tool to support podiatric medical education. The limitations inherent in the quasi-experimental design necessitate further studies to confirm its effectiveness and long-term impact on podiatric medical education.


Asunto(s)
Evaluación Educacional , Multimedia , Podiatría , Estudiantes de Medicina , Podiatría/educación , Humanos , Evaluación Educacional/métodos , Estudiantes de Medicina/estadística & datos numéricos , Educación de Pregrado en Medicina/métodos , Femenino , Masculino , Curriculum , Aprendizaje , Adulto Joven , Adulto
6.
Women Health ; 64(5): 416-426, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38706246

RESUMEN

This systematic review and meta-analysis aimed to explore the effectiveness of preoperative multimedia educational sessions on the levels of anxiety and satisfaction among women undergoing cesarean section (CS). The Scopus, PubMed, and Cochrane databases were searched without language limitations for eligible randomized controlled trials (RCTs) published from their inception up to October 15, 2023. A random-effect meta-analysis was conducted, and the quality of this meta-analysis was evaluated using the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) approach. Seven RCTs (n = 1006 women) met the inclusion criteria. Preoperative multimedia sessions were found to significantly reduce anxiety levels (n = 6 RCTs, weighted mean difference: -3.10; 95 percent confidence intervals (CI): -4.48, -1.73; I2 = 44.24 percent, moderate certainty of evidence) compared to the control group. However, there was no significant difference between the two groups regarding women's satisfaction after surgery (n = 5 RCTs, risk ratio: 1.37; 95 percent CI: 0.76, 2.50; I2 = 98.26 percent, moderate certainty of evidence). Leave-one-out sensitivity analysis showed robustness of the outcomes. The findings of this meta-analysis suggest that providing multimedia educational programs before surgery could potentially have a beneficial effect on the levels of anxiety experienced by women undergoing CS. However, it is imperative to validate these results through larger samples and multi-centered RCTs.


Asunto(s)
Ansiedad , Cesárea , Multimedia , Satisfacción del Paciente , Cuidados Preoperatorios , Femenino , Humanos , Embarazo , Ansiedad/prevención & control , Cesárea/psicología , Educación del Paciente como Asunto/métodos , Cuidados Preoperatorios/métodos
7.
Nurse Educ Today ; 139: 106253, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38788632

RESUMEN

BACKGROUND: Given the realities of global aging, maintaining Comprehensive Geriatric Assessment (CGA) abilities among clinical nurses is very important. Newer methods of continuing education are needed to engage nurses in CGA education. Using multimedia and game-based applications in CGA education (CGA APP) may be an effective method for continuing education. OBJECTIVES: To test the effectiveness of CGA APP in improving nurses' confidence in their abilities to perform geriatric care. DESIGN: A randomized, controlled trial were adopted. SETTING: An 1343-bed tertiary-care medical center in southern Taiwan. PARTICIPANTS: A total of 1250 nurses met inclusion criteria in 35 adult wards. We employed stratified sampling to recruit a total of 132 nurses proportional to the number of nurses in each ward, from January to March 2019. METHODS: Based on the Octalysis gamification framework, the CGA APP was developed. Participants were randomly assigned to either an CGA APP or a control group, which received traditional classroom learning of the same content. The main outcome was improvement in confidence in geriatric care ability were measured before and end of the training session, and six months later. RESULTS: There were no differences in baseline characteristics (except years of experience as a registered nurse), knowledge, attitudes or confidence of geriatric care between the two groups. Clinical nurses in the CGA APP group demonstrated significantly higher confidence in their geriatric care abilities than control group immediately after the intervention (75.85 ± 10.71 vs. 65.93 ± 8.49, p < 0.001) and six-months later (71.13 ± 9.69 vs. 63.57 ± 8.78, p < 0.001). After using GEE to control the confounding variable, the CGA APP group remained significantly higher confidence in their geriatric care abilities than control group. CONCLUSIONS: Use of multimedia game-based applications my better engage and teach practicing clinical than traditional learning methods. Our findings suggest that such interventions be further developed and tested for a larger variety of continuing education needs.


Asunto(s)
Competencia Clínica , Educación Continua en Enfermería , Multimedia , Humanos , Taiwán , Femenino , Masculino , Educación Continua en Enfermería/métodos , Competencia Clínica/normas , Competencia Clínica/estadística & datos numéricos , Evaluación Geriátrica/métodos , Adulto , Enfermería Geriátrica/educación , Enfermería Geriátrica/métodos , Juegos de Video , Anciano
8.
PLoS One ; 19(5): e0297394, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38781168

RESUMEN

Triple-masked three-armed feasibility parallel randomized controlled trial. Multimedia patient education materials are increasingly used in healthcare. While much research focuses on optimising their scientific content, research is equally needed to optimise design and implementation. This study aims to determine the feasibility of a study examining how the implementation of scientific advice on design affects patient outcomes. Participants aged 10-18 with radiographically confirmed adolescent idiopathic scoliosis will be recruited from community settings in Ireland and randomized into usual care or receiving multimedia educational videos with or without evidence-informed design principles. Participants will be masked in the two video intervention arms, as will the therapist sending the educational videos. Outcomes will include the number of participants recruited and randomized, the number analysed post-intervention and at week eight, and the outcomes for baseline, post-intervention, and week 8. Adverse events will also be reported. This feasibility randomized controlled trial will offer insight into the feasibility of implementing advice from the literature in designing a trial of multimedia patient education materials for a population with adolescent idiopathic scoliosis. Trial registration: Clinical Trail: Trial is registered on ClinicalTrials.gov as NCT06090344.


Asunto(s)
Estudios de Factibilidad , Multimedia , Educación del Paciente como Asunto , Escoliosis , Humanos , Escoliosis/terapia , Adolescente , Educación del Paciente como Asunto/métodos , Niño , Femenino , Masculino , Grabación en Video
9.
Sci Rep ; 14(1): 9133, 2024 04 21.
Artículo en Inglés | MEDLINE | ID: mdl-38644370

RESUMEN

Multimedia is extensively used for educational purposes. However, certain types of multimedia lack proper design, which could impose a cognitive load on the user. Therefore, it is essential to predict cognitive load and understand how it impairs brain functioning. Participants watched a version of educational multimedia that applied Mayer's principles, followed by a version that did not. Meanwhile, their electroencephalography (EEG) was recorded. Subsequently, they participated in a post-test and completed a self-reported cognitive load questionnaire. The audio envelope and word frequency were extracted from the multimedia, and the temporal response functions (TRFs) were obtained using a linear encoding model. We observed that the behavioral data are different between the two groups and the TRFs of the two multimedia versions were different. We saw changes in the amplitude and latencies of both early and late components. In addition, correlations were found between behavioral data and the amplitude and latencies of TRF components. Cognitive load decreased participants' attention to the multimedia, and semantic processing of words also occurred with a delay and smaller amplitude. Hence, encoding models provide insights into the temporal and spatial mapping of the cognitive load activity, which could help us detect and reduce cognitive load in potential environments such as educational multimedia or simulators for different purposes.


Asunto(s)
Encéfalo , Cognición , Electroencefalografía , Multimedia , Humanos , Cognición/fisiología , Masculino , Femenino , Encéfalo/fisiología , Adulto Joven , Adulto , Estimulación Acústica , Lingüística , Atención/fisiología
10.
AJR Am J Roentgenol ; 222(5): e2431287, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38598355
11.
Proc Natl Acad Sci U S A ; 121(12): e2309054121, 2024 Mar 19.
Artículo en Inglés | MEDLINE | ID: mdl-38466840

RESUMEN

COVID-19 forced students to rely on online learning using multimedia tools, and multimedia learning continues to impact education beyond the pandemic. In this study, we combined behavioral, eye-tracking, and neuroimaging paradigms to identify multimedia learning processes and outcomes. College students viewed four video lectures including slides with either an onscreen human instructor, an animated instructor, or no onscreen instructor. Brain activity was recorded via fMRI, visual attention was recorded via eye-tracking, and learning outcome was assessed via post-tests. Onscreen presence of instructor, compared with no instructor presence, resulted in superior post-test performance, less visual attention on the slide, more synchronized eye movements during learning, and higher neural synchronization in cortical networks associated with socio-emotional processing and working memory. Individual variation in cognitive and socio-emotional abilities and intersubject neural synchronization revealed different levels of cognitive and socio-emotional processing in different learning conditions. The instructor-present condition evoked increased synchronization, likely reflecting extra processing demands in attentional control, working memory engagement, and socio-emotional processing. Although human instructors and animated instructors led to comparable learning outcomes, the effects were due to the dynamic interplay of information processing vs. attentional distraction. These findings reflect a benefit-cost trade-off where multimedia learning outcome is enhanced only when the cognitive benefits motivated by the social presence of onscreen instructor outweigh the cognitive costs brought about by concurrent attentional distraction unrelated to learning.


Asunto(s)
Aprendizaje , Multimedia , Humanos , Cognición/fisiología , Memoria a Corto Plazo/fisiología , Estudiantes
12.
Chemosphere ; 354: 141641, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38460850

RESUMEN

The knowledge of polycyclic aromatic hydrocarbons (PAHs) in wetlands remains limited. There is a research need for the dynamics between interfaces of multimedia when ice is present in this fragile ecosystem. In this study, sediment, open-water, sub-ice water, and ice samples were collected from the Songhua wetland to study the behaviors of PAHs with and without influences from ice. The concentration of all individual PAHs in sub-ice water (370-1100 ng/L) were higher than the open-water collected from non-ice-covered seasons (50-250 ng/L). Enrichment of PAHs in the ice of wetland was found, particularly for high-molecular-weight PAHs (HMW). This could be attributed to the relatively lower polarity of hydrocarbons compounds, making them more likely to remain in the ice layer during freezing. Source assessments reveal common sources for sub-ice water and ice, which differ from those in the open water in non-ice-covered seasons. This difference is primarily attributed to heating activities in the Harbin during winter. The average percentage contributions were 79% for sub-ice water and 36% for ice related to vehicle exhausts and coal combustion. Additionally, wood burning contributed 25% to sub-ice water and 62% to ice. Sediment in the wetland was found to serve as a final deposit particularly for heavier PAHs, especially those with 6 rings. Sediment also has the potential to act as a source for the secondary emission of low-molecular-weight PAHs (LMW) congeners into the water. PAHs in wetland displayed low ecological risk, while HMW PAHs with relative higher ecological risk is recommended to be further monitored.


Asunto(s)
Hidrocarburos Policíclicos Aromáticos , Contaminantes Químicos del Agua , Hidrocarburos Policíclicos Aromáticos/análisis , Estaciones del Año , Humedales , Ecosistema , Multimedia , Monitoreo del Ambiente , Agua , China , Contaminantes Químicos del Agua/análisis , Sedimentos Geológicos
13.
Eval Program Plann ; 103: 102416, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38452409

RESUMEN

Child marriage has continued to rear its ugly head in Nigerian society. This study aimed to evaluate the impact of storytelling and multimedia music interventions in improving knowledge of the Child Rights Act and reducing the propensity to engage in child marriage. The researchers applied a quasi-experimental design and collected data using a structured questionnaire. The children were assigned into three groups (control, storytelling and multimedia music) of 173 participants. It was found that the interventions were effective. In particular, while storytelling contributed more to reducing the propensity to engage in child marriage, multimedia music contributed more to improving knowledge of the Child Rights Act. These results suggest that storytelling and multimedia music interventions can be effective approaches for addressing the lingering problem of child marriage in Nigeria.


Asunto(s)
Musicoterapia , Música , Niño , Humanos , Multimedia , Matrimonio , Evaluación de Programas y Proyectos de Salud
14.
Korean J Med Educ ; 36(1): 105-110, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38462246

RESUMEN

PURPOSE: Although interest in various forms of learning media is increasing due to the coronavirus disease 2019 (COVID-19) pandemic there is relatively little research on influencing student motivation by intervening in cognitive processing. The purpose of this study was to present the optimal form of learning materials provided to medical students. METHODS: This study provided learning materials in class at a level according to social cues (script, video [artificial intelligence (AI) voice], video [professor voice]) based on the principle of voices among the principles of personalization, voices, image, and embodiment of social cues in multimedia learning, and surveyed students' opinions. RESULTS: There was no statistically significant difference according to social clues in satisfaction and learning help, but both appeared in the order of silent videos containing the professor's voice, followed by videos containing the AI voice. CONCLUSION: This study is significant in that there is no research on the impact of student motivation on the provision of learning materials for medical school education in Korea, and we hope that it will help provide learning materials for self-directed learning of medical students in the post-COVID-19.


Asunto(s)
COVID-19 , Estudiantes de Medicina , Humanos , Señales (Psicología) , Estudiantes de Medicina/psicología , Multimedia , Inteligencia Artificial
15.
PLoS One ; 19(2): e0298861, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38416731

RESUMEN

Multimedia technology holds paramount importance in driving innovation within vocational education, significantly influencing learning satisfaction. Its integration facilitates dynamic and interactive learning environments, catering to diverse learning styles and preferences. Moreover, multimedia technology enables educators to simulate real-world scenarios, providing practical and hands-on training opportunities. This aspect is particularly valuable in vocational education, where practical skills and application are required. The paper investigates the impact of multimedia technology in enhancing learning satisfaction within innovative vocational education. It delves into the utilization of multimedia tools and their correlation with learner satisfaction, exploring how these technologies augment engagement and comprehension in vocational training. The primary data from 515 students of vocational colleges of China has been collected and regression analysis is applied for empirical analysis. The findings of the study highlight that multimedia technology has positive relationship with innovative vocational education and learning outcome. The findings contribute valuable insights for policymakers regarding significant role multimedia plays in fostering enhanced learning experiences and overall satisfaction among vocational learners.


Asunto(s)
Multimedia , Educación Vocacional , Humanos , Aprendizaje , Satisfacción Personal , Estudiantes
17.
BMC Med Educ ; 24(1): 113, 2024 Feb 05.
Artículo en Inglés | MEDLINE | ID: mdl-38317141

RESUMEN

BACKGROUND: Medical education increasingly relies on digital learning materials. Despite recognition by the Association of American Medical Colleges Institute for Improving Medical Education, medical education design often fails to consider quality multimedia design principles. Further, the AAMC-IIME issued a call to study the role of design principles in medical education. Thus, the current study investigated the cognitive and affective effects of redesigning PowerPoint slides used to support pharmacology content during the preclinical years of medical school training. METHODS: Researchers implemented a quasi-experimental design, using traditionally-designed (original) slides with a Traditional group (n = 100) and slides redesigned to follow principles from the Cognitive Theory of Multimedia Learning with an Experimental group (n = 40). Participants in the Experimental group completed a post-survey incorporating the Situational Interest Survey for Multimedia to indicate motivational engagement with the media. Students in the Experimental group also responded to additional preference questions. Researchers analyzed survey responses and students' scores in pharmacology-related coursework across the preclinical Foundations Phase of training to determine the impact on achievement and motivation. RESULTS: Findings related to learner achievement showed a modest but significant increase in the Experimental group compared to the Traditional group in the Cardiac, Pulmonary, and Renal (CPR) educational block (105%, normalized to Traditional group, p = 0.013) and cumulative pharmacology grades (101%, normalized to Traditional group, p = 0.043). Additionally, participants in the Experimental group indicated a significantly higher average triggered situational interest in redesigned slides (M = 4.85, SD = 0.25) than the original slides (M = 3.23, SD = 1.40, t=-6.33, p < 0.001). Similarly, the interest rating of the redesigned slides (M = 4.87, SD = 0.24) was significantly greater than that of the original slides (M = 3.89, SD = 0.86, t=-6.824, p < 0.001). Moreover, results further indicated significant differences in the maintained-feeling and maintained-value constructs, and all participants in the Experimental group indicated a preference for the redesigned slides. CONCLUSIONS: The findings provide strong evidence in support of using the Cognitive Theory of Multimedia Learning design principles to intentionally design media in medical education. In addition to increased achievement scores, students in the Experimental group demonstrated significantly higher levels of situational interest in the redesigned slides, especially triggered interest and maintained-feeling interest. Medical education learning designers should seriously consider redesigning media to achieve similar results.


Asunto(s)
Aprendizaje , Multimedia , Humanos , Estudiantes , Motivación , Evaluación Educacional
18.
J Health Commun ; 29(3): 220-231, 2024 Mar 03.
Artículo en Inglés | MEDLINE | ID: mdl-38354319

RESUMEN

Public participation in precision medicine (PM) research is essential to achieving effective health care but has been impeded by a lack of awareness and basic knowledge. There is a critical need for educational materials that can clearly explain PM to foster involvement. This randomized controlled trial with a posttest-only control group design aims to assess the effects of educational messages delivered through animations relative to live-action videos and leaflets on intentions of involvement in PM research. Knowledge as the moderator and four mediators (engagement, vividness, trustworthiness, and cognitive value) of the intended effects were also evaluated. A total of 326 U.S. adults were sampled from Amazon Mechanical Turk. Among participants with less knowledge about PM, animations produced stronger information-seeking intentions and willingness to participate than leaflets. The effects of three message modalities were not significantly different among average and highly knowledgeable participants. Engagement and vividness mediated the effects of animations relative to two other message modalities. Trustworthiness and cognitive value mediated the effects of animations relative to live-action videos. Overall, animations can be an effective communication strategy to motivate involvement in PM but its effectiveness could decline as knowledge increases. The explanations and implications of the findings were discussed.


Asunto(s)
Multimedia , Medicina de Precisión , Adulto , Humanos , Intención
19.
Environ Sci Technol ; 58(5): 2574-2583, 2024 Feb 06.
Artículo en Inglés | MEDLINE | ID: mdl-38266484

RESUMEN

To recover multimedia mercury from coal-fired power plants, a novel N-containing conjugated polymer (polyaniline and polypyrrole) functionalized fly ash was prepared, which could continuously adsorb 99.2% of gaseous Hg0 at a high space velocity of 368,500 h-1 and nearly 100% of aqueous Hg2+ in the solution pH range of 2-12. The adsorption capacities of Hg0 and Hg2+ reach 1.62 and 101.36 mg/g, respectively. Such a kind of adsorbent has good environmental applicability, i.e. good resistance to coexisting O2/NO/SO2 and coexisting Na+/K+/Ca2+/Mg2+/SO42-. This adsorbent has very low specific resistances (6 × 106-5 × 109 Ω·cm) and thus can be easily collected by an electrostatic precipitator under low-voltage (0.1-0.8 kV). The Hg-saturated adsorbent can desorb almost 100% Hg under relatively low temperature (<250 °C). Characterization and theoretical calculations reveal that conjugated-N is the critical site for adsorbing both Hg0 and Hg2+ as well as activating chlorine. Gaseous Hg0 is oxidized and adsorbed in the form of HgXClX(ad), while aqueous Hg2+ is adsorbed to form a complex with conjugated-N, and parts of Hg2+ are reduced to Hg+ by conjugated-N. This adsorbent can be easily large-scale manufactured; thus, this novel solid waste functionalization method is promising to be applied in coal-fired power plants and other Hg-involving industrial scenes.


Asunto(s)
Contaminantes Atmosféricos , Mercurio , Ceniza del Carbón/química , Contaminantes Atmosféricos/análisis , Mercurio/análisis , Multimedia , Polímeros , Carbón Mineral , Pirroles , Gases , Centrales Eléctricas
20.
J Hazard Mater ; 465: 133436, 2024 Mar 05.
Artículo en Inglés | MEDLINE | ID: mdl-38190795

RESUMEN

Although the combined pollution of trace elements and antibiotics has received extensive attention, the fate and toxicity risk of trace elements with high antibiotic risk are still unclear. The multimedia distributions, partitioning, sources, toxicity risks and co-occurrence network characteristics of trace elements in surface water (SW), overlying water (OW), pore water (PW) and sediment (Sedi) samples of 61 sites from Baiyangdian (BYD) Lake were investigated. The trace elements in the SW and OW are derived mainly from traffic and agricultural sources, and those in PW and Sedi samples are primarily from lithogenic and industrial sources. The total toxicity risk index (TRI) of nine trace elements (ΣTRI) in Sedi samples showed a very high toxicity risk (18.35 ± 8.84), and a high combined pollution toxicity risk (ΣΣTRI) was observed in PW (149.17 ± 97.52) and Sedi samples (46.37 ± 24.00). The co-occurrence network from SW to PW became more vulnerable. Generally, total antibiotics and TP may be keystones of trace elements in water and sediment. The high antibiotic risk significantly influenced ΣΣTRI in water samples but not in Sedi samples. The findings provide new implications for the monitoring and control of combined antibiotic-trace element pollution in shallow lakes.


Asunto(s)
Oligoelementos , Contaminantes Químicos del Agua , Monitoreo del Ambiente , Oligoelementos/análisis , Lagos , Antibacterianos/análisis , Multimedia , Contaminantes Químicos del Agua/análisis , Sedimentos Geológicos , Agua , China , Medición de Riesgo
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