生态环境学报Issue(9)：1534-1539,6.DOI:10.16258/j.cnki.1674-5906.2015.09.017
铅锌冶炼废渣堆场土壤重金属污染特征研究
Study of the Characteristics of Heavy Metal Pollution at Pb/Zn Smelting Slag Site
摘要
Abstract
A large amount of slags rich in heavy metals had been produced during nonferrous smelting process. These smelting slags were directly piled and no recycling technology was used on them, thus heavy metals entered into the soil under the weathering and leaching of rain. Heavy metal content and distribution at or around Pb/Zn smelting slag site were studied applying sampling investigation, chemical analysis and assessment in the paper. The conclusion shows:The weight of Pb, Zn, Cd and Cu is 1 889.60, 5 682.00, 48.40 and 1 848.60 mg·kg-1 individually in the surface soil (0~20 cm) at Pb/Zn smelting slag site, the content is far beyond the national standard (GB 15618─1995), Pb content is 5.40 times of the national standard, Zn、Cd and Cu is 18.94, 80.67 and 18.49 times of the national standard individually. So heavy metals such as Pb, Zn, Cd and Cu are severely polluted the surface soil at Pb/Zn smelting slag site. At the site of 10 m far away from the slag field,the weight of Pb, Zn, Cd and Cu is 641.01, 1 509.61, 38.45 and 1 240.10 mg·kg-1 individually, which is 2.14, 6.04, 128.17 and 12.40 times of the national standard. Pb, Zn, Cd and Cu weight is individual 309.80, 685.71, 8.81 and 875.13 mg·kg-1 at the site of 1 000 m far away from the slag field, and Pb content is 1.03 times of the national standard, Zn is 2.74 times of the national standard, Cd is 29.33 times of the national standard, Cu is 8.75 times of the national standard. Thus the surface soil around Pb/Zn smelting slag site is also polluted inordinately. In vertical, the content of Pb, Zn, Cd and Cu decreased with the increasing of the soil depth, e.g. Pb, Zn, Cd and Cu content in the surface soil is higher than under the surface soil. In horizon, Pb, Zn, Cd and Cu content at Pb/Zn smelting slag site is higher than both 10 m far away from and 1 000 m far away from Pb/Zn smelting slag site. So with the increasing of the distance from pollution sources, Pb, Zn, Cd and Cu content is decreased. Smelting slags of stacking results in the pollution of environment so that it is necessary to strengthen the management and disposal of smelting slag.关键词
冶炼废渣/重金属/土壤/污染特征Key words
smelting slag/heavy metal/soil/characteristic of pollution分类
资源环境引用本文复制引用
邓新辉,柴立元,杨志辉,袁艺宁..铅锌冶炼废渣堆场土壤重金属污染特征研究[J].生态环境学报,2015,(9):1534-1539,6.基金项目
国家自然科学基金项目（51474102）；湖南省自然科学基金项目 （）
