铅锌矿渣酸性淋溶下重金属释放特征及其对植物幼苗生长的影响  

Release characteristics of heavy metals in Pb/Zn tailings under acid leaching and the effects of leachate on plant seedlings growth

作　　者：王兰[1] 刘方[1] 王俭[1] 李金娟[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵阳550003

出　　处：《生态学杂志》2010年第6期1121-1126,共6页Chinese Journal of Ecology

基　　金：国家基础研究发展计划前期研究专项资助项目(2008CB417209)

摘　　要：探讨了贵州省赫章铅锌矿区铅锌矿渣及尾矿酸性淋溶下重金属的释放特征及淋溶水对植物幼苗生长的影响。结果表明,随着淋溶时间的延长,淋溶水中Cu、Zn、Pb、Cd含量均呈下降趋势,其浓度范围分别为0.038～2.509、0.0001～0.850、0.040～0.605和0.004～0.021mg.L-1,淋溶水以Cd、Pb污染为主。前期(1～5d)淋溶水对幼苗的根长、芽长有显著的抑制作用,后期(20～25d)抑制作用明显下降;物种耐性由强到弱的大小顺序为白菜>油菜>黑麦草。A leaching experiment was conducted to study the release characteristics of heavy metals in the Pb/Zn tailings from Hezhang County of Guizhou Province, and the effects of the leachate on the growth of plant seedlings. With the increasing time of leaching, the contents of Cu, Zn, Pb, and Cd in the leachate had a decreasing trend, with their concentrations being 0. 038-2. 509, 0. 0001-0. 850, 0. 040-0. 605, and 0. 004-0. 021 mg · L^-1 , respectively. Cd and Pb were the main components in the leachate. At early stage （days 1-5） , the leachate had significant inhibitory effects on the growth of seedling＇ s roots and buds; but at late stage （days 20-25）, the inhibitory effects decreased. Among the test plants, cabbage had the strongest resistance capability, followed by rape, and ryegrass.

关 键 词：铅锌矿渣 酸性淋溶 重金属 幼苗生长 

分 类 号：X50[环境科学与工程—环境工程] X173