Organic residues and biochar to immobilize potentially toxic elements in soil from a gold mine in the Amazon
| Autor: | Renato Alves Teixeira, Antonio Rodrigues Fernandes, Yan Nunes Dias, Duane Azevedo Pinto, Danielle Monteiro de Oliveira, Hercília Samara Cardoso da Costa, Edna Santos de Souza, Newton Paulo de Souza Falcão |
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| Rok vydání: | 2018 |
| Předmět: |
Gold mining
Health Toxicology and Mutagenesis 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Mining Soil food Metals Heavy Biochar Humans Soil Pollutants Organic matter Revegetation 0105 earth and related environmental sciences chemistry.chemical_classification Waste Products 021110 strategic defence & security studies business.industry Public Health Environmental and Occupational Health General Medicine Biodegradable waste Lettuce Pollution food.food chemistry Environmental chemistry Charcoal Soil water Gold Soil fertility business Brazil Brazil nut |
| Zdroj: | Ecotoxicology and environmental safety. 169 |
| ISSN: | 1090-2414 |
| Popis: | Waste from gold mining (Au) is a threat to the ecosystem and human health because it contains high levels of potentially toxic elements (PTEs). Organic waste and biochar can be used to recover contaminated soils from mining areas because they have the potential to immobilize PTEs and improve soil fertility, enabling revegetation. The objective of this study was to investigate the efficiency with which organic residues and biochar immobilize PTEs in a multicontaminated soil of a small-scale Au mine in the state of Para. The soil from a gold mining area was mixed with different proportions (v/v) of coffee ground residues (Bcoffee), Brazil nut tegument residues (BN), acai palm stone residues (A), and Brazil nuts biochar residues to determine which treatment is best for immobilizing PTEs. The treatments with the addition of BN and A resulted in low pH and high contents of organic matter (OM) and phosphor (P) The BN increased the available levels of Ba and reduced the available levels of Ni. The addition of coffee ground residues and biochar increased the uptake of Ba, Pb, and Ni in lettuce plants compared to treatments with BN and A. Plants grown with A showed higher dry matter yield and lower absorption and translocation of PTEs. Thus, the addition of BN and A residues in PTE phytostabilization programs in PTE-multicontaminated soils is a potential possibility. |
| Databáze: | OpenAIRE |
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