Effects of biochar and greenwaste compost amendments on mobility, bioavailability and toxicity of inorganic and organic contaminants in a multi-element polluted soil
Effects of biochar and greenwaste compost amendments on mobility, bioavailability and toxicity of inorganic and organic contaminants in a multi-element polluted soil
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DOI：
10.1016/j.envpol.2010.02.003
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发表时间：
2010-06-01
影响因子：
8.9
通讯作者：
Gomez-Eyles, Jose L.
中科院分区：
文献类型：
--
作者：
Beesley, Luke;Moreno-Jimenez, Eduardo;Gomez-Eyles, Jose L.
对多元素污染的土壤施用改良剂可能会对特定元素的流动性、生物利用度和毒性产生相互矛盾的影响，这取决于改良剂。在污染土壤中添加生物炭和绿色垃圾堆肥，监测60天以上的田间暴露，微量元素和多环芳烃，之后通过一个简单的生物指示剂测试进行植物毒性评估。铜和砷在土壤孔隙水中的浓度增加了30倍以上，加入这两个修正案，与溶解性有机碳和pH值显着增加，而锌和镉显着下降。生物炭是最有效的，导致在孔隙水中的镉减少10倍，从而减少植物毒性。生物炭还降低了多环芳烃的浓度，较重、毒理学相关的多环芳烃浓度降低了50%以上。研究结果突出了生物炭用于污染土地修复的潜力。(C)2010爱思唯尔有限公司版权所有。
Applying amendments to multi-element contaminated soils can have contradictory effects on the mobility, bioavailability and toxicity of specific elements, depending on the amendment. Trace elements and PAHs were monitored in a contaminated soil amended with biochar and greenwaste compost over 60 days field exposure, after which phytotoxicity was assessed by a simple bio-indicator test. Copper and As concentrations in soil pore water increased more than 30 fold after adding both amendments, associated with significant increases in dissolved organic carbon and pH, whereas Zn and Cd significantly decreased. Biochar was most effective, resulting in a 10 fold decrease of Cd in pore water and a resultant reduction in phytotoxicity. Concentrations of PAHs were also reduced by biochar, with greater than 50% decreases of the heavier, more toxicologically relevant PAHs. The results highlight the potential of biochar for contaminated land remediation. (C) 2010 Elsevier Ltd. All rights reserved.