水土保持学报2012，Vol.26Issue(6)：194-198,5.
淹水条件下生物炭对污染土壤重金属有效性及养分含量的影响
Impacts of Biochar on Availability of Heavy Metals and Nutrient Content of Contaminated Soil Under Waterlogged Conditions
摘要
Abstract
Biochar as modifying agent was used to study impacts of applying different amounts of biochar(1%,3% and 5%) to contaminated soil on available concentrations of Zn,Cd,Pb,Cu and nutrition contents under waterlogged condition.This article also assessed immobilization effect by using TCLP(toxicity characteristic leaching procedure).The results showed that application of biochar could effectively reduce the availability of Zn,Cd,Pb and Cu compared with control treatment.Compared with the treatment without biochar,the decreasing rate of concentration of exchangeable Zn,Cd,Pb,and Cu ranged from 0.15% to 24.11%,from 1.22% to 16.09%,from 0.47% to 21.51%,and from 3.05% to 77.30%,respectively,and the decreasing rate decreased gradually as biochar application rate increased.Compared with the treatment without biochar,the decreasing rate of concentrations of Zn,Cd,Pb and Cu extracted by TCLP ranged from 0.74% to 21.47%,from 6.67% to 47.62%,from 2.02% to 16.74%,and from 0.29% to 21.20%,respectively,and its decreasing rate decreased gradually as biochar application rate increased.Besides,as compared with the treatment without biochar,pH value,organic matter,ammonium nitrogen,and nitrate nitrogen of the treatment applied biochar increased by(-0.01)~0.35 units,0.09%~20.02%,1.59%~38.28% and 2.74%~90.14%,respectively.Concentration of exchangeable Cu was significantly negatively correlated with soil pH,and concentration exchangeable Zn was significantly negatively correlated with soil organic matter content.Using biochar in contaminated soil could reduce the availability of Zn,Cd,Pb,Cu and ecological risk under waterlogged condition,and it also could improve the soil nutrient content.关键词
生物炭/重金属/有效性/污染土壤/淹水Key words
biocahr/heavy metal/availability/contaminated soil/waterlogged分类
资源环境引用本文复制引用
许超,林晓滨,吴启堂,汤海涛,廖育林,秦晓波..淹水条件下生物炭对污染土壤重金属有效性及养分含量的影响[J].水土保持学报,2012,26(6):194-198,5.基金项目
国家自然科学基金项目 （）
广东省自然科学基金项目 （）
湖南省科技支撑计划项目 （）
