水土保持学报2018，Vol.32Issue(1)：286-290,5.DOI:10.13870/j.cnki.stbcxb.2018.01.045
生物炭与沸石混施对不同污染土壤镉形态转化的影响
Influence of Fixed Addition of Biochar and Natural Zeolite on the Fraction Transform of Cadmium in Different Contaminated Soil
摘要
Abstract
The different cadmium (Cd) contaminated (1.0 and 10.0 mg/L) soils were simulated in laboratory.And the effects of fixed addition of biochar and zeolite (1:1) on soil pH and the changes of Cd morphology were studied.The addition amounts of the mixture were low (0.4％),medium (2％) and high (10％),respectively.Results showed that the values of pH were higher in the contaminated soil than the control,and increased with the increasing addition amount of mixture.With the increasing incubation time,the value of pH was gradually decreased in the lowly contaminated soil,whereas increased earlier,then decreased,and finally stable in the highly contaminated soil.In the late stages of incubation,the decreased percentages of effective Cd with the mixture addition of 2％ and 10％ were highest for the lowly contaminated and highly contaminated soil respectively,i.e.56.78％ and 27.33％.The exchangeable Cd percentage was gradually increased with the addition of biochar and zeolite mixture in soil.The percentages of exchangeable Cd were reduced by 8.35％,13.81 ％ and 20.65％,respectively,compared with the control soil in the lowly contaminated soil,and by 10.02％,22.34％ and 33.01％,respectively in the highly contaminated soil.The contents of exchangeable Cd could be reduced in soil with the passivation agent,through increasing the Cd contents of Carbonate bound,Fe-Mn oxide-bound,organic-bound and residual Cd.The Cd content of organic-bound Cd was higher in the lowly contaminated soil than the highly contaminated soil.Thus,the fixed addition of biochar and zeolite could reduce the bioavailability of heavy metals in soil,providing a theoretical foundation for farmland soil remediation.关键词
生物炭/沸石/镉污染土壤/pH/镉形态Key words
biochar/zeolite/Cd contaminated soil/pH/Cd form分类
资源环境引用本文复制引用
吴岩,杜立宇,梁成华,张盼,王沛文,郭炜辰..生物炭与沸石混施对不同污染土壤镉形态转化的影响[J].水土保持学报,2018,32(1):286-290,5.基金项目
沈阳农业大学校青年基金项目 （）
国家重点研发计划项目(2016YFC0501205-04) （2016YFC0501205-04）
国家科技支撑计划项目(2015BAD05B00) （2015BAD05B00）
