Sun Yefang, Xie Zhengmiao, Li Jing, Xu Jianming, Chen Zuliang, Naidu Ravi
Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China.
Environ Geochem Health. 2006 Feb-Apr;28(1-2):73-8. doi: 10.1007/s10653-005-9014-0. Epub 2006 Mar 10.
The concentrations of Cu, Zn, Pb and Cd in soils near a lead-zinc mine located in Shangyu, Zhejiang Province, China, were determined and their toxicity was assessed using the toxicity characteristic leaching procedure (TCLP) developed by the United States Environmental Protection Agency. The TCLP method is a currently recognized international method for evaluation of heavy metal pollution in soils. The available levels of Cu, Zn, Pb and Cd were 8.2-36, 23-143, 6.4-1367 and 0.41-2.2 mg kg(-1), respectively, while the international standards were 15, 25, 5 and 0.5 mg kg(-1), respectively. Soils around the mine were more polluted with Zn and Pb, followed by Cd and Cu. Moreover, the levels of heavy metals in the soils extracted by TCLP indicated that extraction fluid 2 was more effective than extraction fluid 1 in extracting the heavy metals from the polluted soils and there was a positive correlation between fluids 1 and 2. Available heavy metal contents determined by TCLP were correlated with soil total heavy metal contents.
测定了位于中国浙江省上虞市的某铅锌矿附近土壤中铜、锌、铅和镉的含量，并采用美国环境保护局制定的毒性特性浸出程序（TCLP）对其毒性进行了评估。TCLP方法是目前国际上公认的评估土壤重金属污染的方法。铜、锌、铅和镉的有效含量分别为8.2 - 36、23 - 143、6.4 - 1367和0.41 - 2.2 mg kg⁻¹，而国际标准分别为15、25、5和0.5 mg kg⁻¹。矿区周围土壤受锌和铅污染更严重，其次是镉和铜。此外，TCLP提取的土壤中重金属含量表明，提取液2在从污染土壤中提取重金属方面比提取液1更有效，且提取液1和提取液2之间存在正相关。通过TCLP测定的有效重金属含量与土壤总重金属含量相关。
