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Assessing phytotoxicity of heavy metals in remediated soil

Por: Branzini, Agustina.
Colaborador(es): Zubillaga, Marta Susana.
ISSN: 1522-6514.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): CHROMIUM | COMPOST | COPPER | FERTILIZER | SESBANIA | TOXICITY | ZINC | HEAVY METAL | PLANT EXTRACT | BIOREMEDIATION | CHEMISTRY | DRUG EFFECT | GERMINATION | METABOLISM | SESBANIA | SOIL | SOIL POLLUTANT | TOXICITY TESTING | BIODEGRADATION, ENVIRONMENTAL | METALS, HEAVY | PLANT EXTRACTS | SOIL POLLUTANTS | TOXICITY TESTS | SESBANIA PUNICEA | SESBANIA VIRGATA | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR. En: International Journal of Phytoremediation vol.12, no.4 (2010) p.335-342Resumen: Copper [Cu], zinc [Zn] and chromium [Cr] are pollutants that usually are accumulated in soils. Their toxicity can be decreased by applying amendments. We proposed to evaluate changes in Cu, Zn, and Cr availability, due to the application of amendments, through chemical analysis and phytotoxicity tests. The phytotoxicity test was carried out using species belonging to Sesbania genus; plant parameters were measured 48, 72, 96, and 168 hours after the start of incubation. The treatments included enriched soil, in addition to biosolid compost and triple superphosphate. Cu and Zn amounts were higher in treatments without amendments, indicating immobilization on the part of these. The amounts of Cr tended to decrease with amendments application. The amendments increased pH values and decreased EC; however, this had no impact on the results. No relationship was found among pH, EC, and plant parameters. Different behaviors were observed. S. virgata showed germination seed delay. In addition, while in S. virgata the IG increased during the assay, in S. punicea it diminished. The application of compost, fertilizer or both combined could be of interest for contaminated soils remediation. The use of chemical analysis and phytotoxicity tests allowed to estimate heavy metal availability and the effect on both Sesbania species.
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Copper [Cu], zinc [Zn] and chromium [Cr] are pollutants that usually are accumulated in soils. Their toxicity can be decreased by applying amendments. We proposed to evaluate changes in Cu, Zn, and Cr availability, due to the application of amendments, through chemical analysis and phytotoxicity tests. The phytotoxicity test was carried out using species belonging to Sesbania genus; plant parameters were measured 48, 72, 96, and 168 hours after the start of incubation. The treatments included enriched soil, in addition to biosolid compost and triple superphosphate. Cu and Zn amounts were higher in treatments without amendments, indicating immobilization on the part of these. The amounts of Cr tended to decrease with amendments application. The amendments increased pH values and decreased EC; however, this had no impact on the results. No relationship was found among pH, EC, and plant parameters. Different behaviors were observed. S. virgata showed germination seed delay. In addition, while in S. virgata the IG increased during the assay, in S. punicea it diminished. The application of compost, fertilizer or both combined could be of interest for contaminated soils remediation. The use of chemical analysis and phytotoxicity tests allowed to estimate heavy metal availability and the effect on both Sesbania species.

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