Usability of rice straw biochar for remediation and amelioration of vanadium contaminated soils in areas under acid rain leaching
| Autor: | Ya-qi Yu, Jin-xin Li, Jin-yan Yang |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Environmental Chemistry. 19:41-51 |
| ISSN: | 1449-8979 1448-2517 |
| DOI: | 10.1071/en21153 |
| Popis: | Environmental context Biochar produced by agricultural wastes can be used for vanadium treatment, soil fertility improvement, and agricultural waste disposal, whereas acid rain leaching may decrease its remediating efficiency of the metal contaminated soil. Therefore, vanadium behaviour in soil and soil quality change after biochar application were analysed under simulated acid rain leaching. Findings provide insights into acid rain leaching effects on soil quality, vanadium release from soil, and biochar remediating efficiency. Rationale Considering the effects of acid rain on the leaching of metals and nutrients in soil, rice straw biochar, with the potential to remediate and improve the quality of vanadium contaminated soil, was further evaluated for its remediating and ameliorating performance of soil under acid rain. Methodology The adsorption capacity and isotherm of vanadium by rice straw biochar were investigated. Simulated acid rain leaching experiments were performed to study the influence of acid rain on vanadium behaviour in soil and nutrients and on the structure of the soil. Results Isotherm adsorption studies indicated a preference for a monolayer process without transmigrations of the adsorbed vanadium onto the biochar surface. After leaching with simulated acid rain, compared with the untreated soil, the available vanadium (129.63 ± 3.75–76.10 ± 3.24 mg kg−1) in the soil decreased notably by adding 2–3 wt% biochar (P |
| Databáze: | OpenAIRE |
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