Presence, mobility and bioavailability of toxic metal(oids) in soil, vegetation and water around a Pb-Sb recycling factory (Barcelona, Spain).
Environ Pollut
; 237: 569-580, 2018 Jun.
Article
em En
| MEDLINE
| ID: mdl-29525624
ABSTRACT
The work was conducted to establish contamination from improper disposal of hazardous wastes containing lead (Pb) and antimony (Sb) into nearby soils. Besides other elements in the affected area, the biological role of Sb, its behaviour in the pedosphere and uptake by plants and the food chain was considered. Wastes contained 139532⯱â¯9601â¯mgâ¯kg-1 (≈14%) Pb and 3645⯱â¯194â¯mgâ¯kg-1 (≈0.4%) Sb respectively and variability was extremely high at a decimetre scale. Dramatically high concentrations were also found for As, Cd, Cu, Mn, Ni, Sn and Zn. In adjacent natural soils metal(oid)s amounts decreased considerably (Pb 5034⯱â¯678â¯mgâ¯kg-1, Sb 112â¯mgâ¯kg-1) though largely exceeded the directives for a given soil use. Metal(oid)s potential mobility was assessed by using H2OâKNO3âEDTA sequential extractions, and EDTA extracts showed the highest concentration suggesting stable humus-metal complexes formation. Nevertheless, selected plants showed high absorption potential of the investigated elements. Pb and Sb values for Dittrichia viscosa grown in wastes was 899⯱â¯627â¯mgâ¯kg-1 and 37⯱â¯33â¯mgâ¯kg-1 respectively. The same plant showed 154⯱â¯99â¯mgâ¯kg-1 Pb and 8⯱â¯4â¯mgâ¯kg-1 Sb in natural soils. Helichrysum stoechas had 323⯱â¯305â¯mgâ¯kg-1 Pb, and 8⯱â¯3â¯mgâ¯kg-1 Sb. Vitis vinifera from alongside vineyards contained 129⯱â¯88â¯mgâ¯kg-1 Pb and 18⯱â¯9â¯mgâ¯kg-1 Sb, indicating ability for metal uptake and warning on metal diffusion through the food chain. The biological absorption coefficient (BAC) and the translocation factor (TF) assigned phytoextraction potential to Dittrichia viscosa and Foeniculum vulgare and phytostabilization potential to Helichrysum stoechas. Dissolved metal (oid)s in the analysed water strongly exceeded the current directive being a direct threat for livings. Data warned against the high contamination of the affected area in all its compartments. Even though native plants growing in metal-contaminated sites may have phytoremediation potential, high risk of metal diffusion may threat the whole ecosystem.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes do Solo
/
Metais Pesados
País/Região como assunto:
Europa
Idioma:
En
Revista:
Environ Pollut
Assunto da revista:
SAUDE AMBIENTAL
Ano de publicação:
2018
Tipo de documento:
Article