Long-term leaching of As, Cd, Mo, Pb, and Zn from coal fly ash in column test
| Autor: | M. Flues, Camila Neves Lange, Maria Eugênia Gimenez Boscov, Iara Maria Carneiro de Camargo, Goro Hiromoto |
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| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
010504 meteorology & atmospheric sciences chemistry.chemical_element 010501 environmental sciences Management Monitoring Policy and Law complex mixtures 01 natural sciences Coal Ash Rainwater harvesting Arsenic Soil Metals Heavy medicine Groundwater 0105 earth and related environmental sciences General Environmental Science Molybdenum Cadmium technology industry and agriculture General Medicine Seasonality equipment and supplies medicine.disease Pollution CARVÃO Waste Disposal Facilities Zinc chemistry Lead Environmental chemistry Fly ash Environmental science Acid rain Leaching (metallurgy) Brazil Environmental Monitoring Power Plants |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1573-2959 |
| Popis: | Globally, millions of tons of coal fly ash (CFA) are generated per year, and the majority of this material is usually stored in stock piles or landfills, and in a long-term, it can be an environmental hazard if rainwater infiltrates the ashes. Long-term leaching studies of Brazilian ashes are scarce. The purpose of this study was to evaluate arsenic, cadmium, molybdenum, lead, and zinc leaching behavior from a Brazilian CFA by a column experiment designed to simulate field conditions: slightly acid rain considering seasonality of precipitation and temperature for a long-term leaching period (336 days). All elements were leached from CFA, except lead. Elements leaching behavior was influenced by leaching time, leaching volume, and temperature. Higher leachability of As and Cd from CFA during warm and wet season was observed. Results indicate a potential risk to soil and groundwater, since ashes are usually stored in uncovered fields on power plants vicinity. |
| Databáze: | OpenAIRE |
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