生物炭
环境化学
修正案
环境修复
堆肥
植物毒性
生物利用度
化学
土壤水分
土壤改良剂
土壤污染
污染
溶解有机碳
土壤污染物
总有机碳
环境科学
农学
土壤科学
热解
生态学
有机化学
生物
法学
生物信息学
政治学
作者
Luke Beesley,Eduardo Moreno-Jiménez,Jose L. Gomez-Eyles
标识
DOI:10.1016/j.envpol.2010.02.003
摘要
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.
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