Sun Ye-fang, Xie Zheng-miao, Xu Jian-ming, Li Jing, Zhao Ke-li
Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China.
Huan Jing Ke Xue. 2005 May;26(3):152-6.
The contents of heavy metals (Cu, Zn, Pb and Cd) in soils from a lead-zinc mine in Shangyu, Zhejiang Province, China, were analyzed and their toxicity was assessed by toxicity characteristic leaching procedure (TCLP), which was developed by US EPA. 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 mg x kg(-1), 23-143 mg x kg(-1), 6.4-1367 mg x kg(-1) and 0.41-2.2 mg x kg(-1), respectively, while the international standard were 15 mg x kg(-1), 25 mg x kg(-1), 5 mg x kg(-1) and 0.5 mg x kg(-1), respectively. The results show that soils around the mine are polluted with heavy metals Cu, Zn, Pb and Cd, especially polluted by Zn and Pb, followed by Cd and Cu. Moreover, the heavy metals in the soils extracted by TCLP indicate that fluid 2 is more effective than fluid 1 in extracting the heavy metals from the polluted soils and there is a positive correlation between fluid 1 and fluid 2. The contents of available heavy metals by TCLP are correlated with contents of total heavy metals.
对中国浙江省上虞市某铅锌矿土壤中的重金属（铜、锌、铅和镉）含量进行了分析，并采用美国环境保护局开发的毒性特征浸出程序（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 mg·kg⁻¹、23 - 143 mg·kg⁻¹、6.4 - 1367 mg·kg⁻¹和0.41 - 2.2 mg·kg⁻¹，而国际标准分别为15 mg·kg⁻¹、25 mg·kg⁻¹、5 mg·kg⁻¹和0.5 mg·kg⁻¹。结果表明，矿区周边土壤受到铜、锌、铅和镉等重金属污染，尤其是锌和铅污染严重，其次是镉和铜。此外，TCLP提取的土壤中的重金属表明，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。TCLP提取的有效重金属含量与总重金属含量相关。
