%0 Journal Article
%T Accumulation, Distribution and Pollution Assessment of Heavy Metals in Surface Sediment of Caohai Plateau Wetland, Guizhou Province<br>草海典型高原湿地表层沉积物重金属的积累、分布与污染评价
%A ZHANG Qing-hai
%A LIN Chang-hu
%A TAN Hong
%A LIN Shao-xia
%A YANG Hong-bo
%A <br>张清海
%A 林昌虎
%A 谭红
%A 林绍霞
%A 杨鸿波
%J 环境科学
%D 2013
%I 
%X The objective of this paper is to investigate the concentrations and distribution characteristics of heavy metals in surface sediments of different areas in the Caohai plateau wetland. 16 samples of surface sediments were collected and 7 heavy metals were analyzed. Heavy metal pollution in surface sediments of different areas in the Caohai plateau wetland was estimated by the Tomlinson Pollution Load Index (PLI) method. The analyzed results indicated that the average contents of Cd, Hg, As, Pb, Cr, Cu, Zn were 0.985, 0.345, 15.8, 38.9, 38.6, 22.8 and 384 mg·kg-1, respectively. The heavy metal distributions varied with regional environment changes, the order of average contents of Cd and Hg in different regions was E(the eastern region)>S(the southern region)>N(the northern region), the order of the average content of Pb was N>E>S, and that of Zn was S>E>N. The results also suggested a medium heavy metal pollution level in the surface sediment of the Caohai plateau wetland with the PLIzone reaching 1.17.The order of pollution level in surface sediments of different regions was E>S>N. The results showed medium pollution levels in E and S region and non-polluted level in N region. The order of pollution parameter was Zn>Hg>Cd>Pb>As>Cu>Cr. Elements Zn and Hg which reached the extreme intensity pollution level were also the major polluted elements in surface sediments of the Caohai plateau wetland. And also, results showed medium pollution levels of Cd and Pb in surface sediments of Caohai plateau wetland. Cluster analysis results showed similar pollution sources of Cd, Zn, Pb and Hg, which should be attached great importance in terms of the prevention of the Caohai plateau wetland.
%K Caohai
%K plateau wetlands
%K surface sediments
%K heavy metals
%K distribution
%K pollution load index<br>草海
%K 高原湿地
%K 表层沉积物
%K 重金属
%K 分布
%K 污染负荷指数法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FC6019F66A5ADD3A85&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=38B194292C032A66&sid=309A221A57FE8496&eid=29036368246435B2&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=25