TITLE

基于梯度扩散薄膜技术的太湖金属和营养盐区域污染特征分析

AUTHOR(S)
周春羊; 管冬兴; 韩永和; 潘岳; 房煦; 王兴雨; 郑建伦; 李亚青; 魏天娇; 邹宜涛; 崔昕毅; 罗军
PUB. DATE
June 2016
SOURCE
Journal of Agro-Environment Science;2016, Vol. 35 Issue 6, p1144
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Concentrations of metals and nutrients in water and sediments from 7 different regions in Lake Taihu were measured using in situ diffusive gradients in thin-films(DGT) technique. Their regional pollution characteristics were evaluated. Results showed that the concentrations of metals and nutrients measured by DGT were lower than those by chemical extraction. Simultaneous measurements of multiple elements at ultra-low concentration levels were obtained using DGT. No obvious differences were found in DGT-measured concentrations of metals in water among 7 regions, while large differences were observed in DGT-measured concentrations of metals in sediments among these regions. Iron, As, Zn, Ni and W were heavily polluted in Zhushan Bay, Meiliang Bay and Lake Gong, compared to the central Lake, Lake Xu and East Lake Taihu. Overall, the order of DGT-measured concentrations of metals in sediments was Fe> Mn> Zn> Ni> As> W> Co> Mo> Cu. Unlike metals, the average P concentrations measured by DGT in water were high, with the highest value(83.2 μg·L-1) appeared in Lake Gong. As for DGT-measured P in the sediments, Zhushan Bay, Meiliang Bay and Coastal region were heavily polluted, with the highest value of 500 μg·L-1 detected. By comparing P concentrations in sediments with those in water, it was found that the sediments in Zhushan Bay, Meiliang Bay and Coastal region probably acted as P sources, which potentially released P to the overlying water.
ACCESSION #
118016656

 

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