赤泥对污染土壤Pb、Zn化学形态和生物可给性的影响  

Effects of red mud addition on fractionation and bio-accessibility of Pb and Zn in contaminated soil

作　　者：郝晓伟[1,2] 黄益宗[1] 崔岩山[2] 胡莹[1] 刘云霞[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]中国科学院研究生院,北京100049

出　　处：《环境工程学报》2010年第6期1431-1435,共5页Chinese Journal of Environmental Engineering

基　　金：国家高技术研究发展计划(863)项目(2007AA061001;2008AA06Z336);国家自然科学基金面上项目(30671204);中国科学院知识创新工程重要方向项目资助(KSCX2-YW-N-41-05)

摘　　要：通过土壤培养实验,研究添加赤泥对污染土壤中Pb、Zn化学形态和生物可给性的影响。结果表明,不同赤泥用量处理均可显著降低土壤中HOAc提取态Pb、Zn含量。当赤泥用量为5%时,培养1、2和3个月后,HOAc提取态Pb含量分别比对照下降62.5%、65.3%和73.5%;HOAc提取态Zn含量分别比对照下降56.7%、65.8%和67.4%。培养3个月后,只有1%赤泥用量处理显著降低了土壤中生物可给性Pb含量,而不同用量赤泥处理均显著降低了土壤中生物可给性Zn含量。研究表明赤泥是一种钝化污染土壤中Pb、Zn的潜力添加剂。Effects of red mud addition on the fractionation and bio-accessibility of Pb and Zn in soil were studied by batch soil column incubation experiment.The results showed that all treatments with red mud addition could significantly decrease the concentrations of HOAc-soluble Pb and Zn.Compared with the control,the treatment with 5% red mud addition could significantly decrease the concentrations of HOAc-soluble Pb and Zn after 1,2 and 3 months incubation（62.5%,65.3% and 73.5% decrease,56.7%,65.8% and 67.4% decrease,for Pb and Zn,respectively）.After 3 months incubation,the treatment with 1% red mud addition significantly decreased the concentration of bio-accessible Pb,however,all treatments including 1%,2% and 5% red mud addition,significantly decreased the concentration of bio-accessible Zn.The results highlighted the potential of red mud amendments to reduce Pb and Zn bioavailability in contaminated soil.

关 键 词：土壤 PB ZN 赤泥 化学形态 生物可给性 

分 类 号：X53[环境科学与工程—环境工程]