生态与农村环境学报2017，Vol.33Issue(5)：453-459,7.DOI:10.11934/j.issn.1673-4831.2017.05.010
秸秆生物炭对矿区污染土壤重金属形态转化的影响
Effects of Application of Straw-Derived Biochar on Forms of Heavy Metals in Mining Contaminated Soil.
摘要
Abstract
An in-lab incubation experiment was conducted on applying biochar derived from wheat straw as a soil remediation amendment to study effect of the application, relative to rate, on forms of heavy metals in mining contaminated soil.Results show that after 150 days of incubation, biochar in the soil significantly increased soil pH and organic carbon content by 0.96%-2.62% and 9.1%-38.6%, respectively.With increasing biochar application rate, the content of acid-extractable Cu, Zn and Cd in the contaminated soil decreased by 7.0%-16.9%, 6.7%-11.8% and 5.3%-9.6%, respectively, while acid-extractable Pb remained almost unchanged.Biochar reduced the contents of reducible Cd and oxidizable Cu, Zn and Pb.The content of residual Cu, Zn, Cd and Pb increased obviously by 10.6%-46.8%, 5.9%-15.7%, 40.9%-191.9% and 1.5%-2.6%, respectively, in biochar amended treatments.Correlation analysis shows that soil pH values and organic carbon contents were significantly correlated with the contents of acid-extractable and residual heavy metals.In short, biochar can promote transformation of Cu, Zn, Cd and Pb in the contaminated soil from acid-extractable, reducible and oxidizable forms to residual form.关键词
生物炭/重金属复合污染/BCR连续提取/形态转化Key words
biochar/complex contamination of heavy metals/BCR sequential extraction/form transformation分类
资源环境引用本文复制引用
吴萍萍,李录久,王家嘉,李敏..秸秆生物炭对矿区污染土壤重金属形态转化的影响[J].生态与农村环境学报,2017,33(5):453-459,7.基金项目
国家科技支撑计划(2012BAD05B0206) （2012BAD05B0206）
公益性行业(农业)科研专项(201503118) （农业）
安徽省农业科学院创新基金(15B1013,17A1023) （15B1013,17A1023）
