Heavy-metal contents in suspended solids of Meiliang Bay,Taihu Lake and its environmental significances

作     者：ZHUGuang-wei CHIQiao-qiao QINBo-qiang WANGWen-min 

作者机构：NanjingInstituteofGeographyandLimnologyChineseAcademyofSciencesNanjing210008China JiangxiAgriculturalUniversityNanchang330045China NanjingInstituteofGeographyandLimnologyChineseAcademyofSciencesNanjing210008China／／GraduateChina SchoolofChineseAcademyofSciencesBeijing100039 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2005年第17卷第4期

页      面：672-675页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：TheNationalNaturalScienceFoundationofChina(No.40 2 0 30 0 7)andtheKeyProjectofChineseAcademyofSciences(KZCX1 SW 1 2 ) 

主　　题：shallow lakes suspended solids heavy metals Taihu Lake 

摘      要：Surface water was taken from river mouth to the central area of Meiliang Bay, Taihu Lake, a large shallow eutrophic lake in China. Suspended solids were condensed by centrifugation 25 L surface water samples from each selected site. Suspended solids and surface sediments were further freeze-dried and microwave digested before determining the metals by ICP-AES. Among the metals analyzed in suspended solids and sediments, contents of Cr, Cu, Mn, Ni, and Zn in suspended solids were significantly higher than those in sediments while contents of Al, Ba, Be, Ca, Co, Fe, K, Mg, Pb, and V in suspended solids were 10%—30% higher than those in sediments. Sr and Ti contents in suspended solids and sediments were very similar. Na content in suspended solids was lower than that in sediments. Heavy metals were significantly accumulated in suspended solids. From the river mouth to the center of Meiliang Bay, contents of Cr, Cu, Pb, and Zn in suspended solids showed a gradual decreasing trend indicating the river(Zhihugang River) still discharged large quantity of heavy metals to Meiliang Bay. The study suggests that the geochemical behaviors and ecological effects of heavy metals in suspended solids may serve as a good indicator for the pollution of lake.