Level and fate of heavy metals in the Changjiang estuary and its adjacent waters |
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Authors: | Changyou Wang Xiulin Wang Bodong Wang Chuansong Zhang Xiaoyong Shi Chenjian Zhu |
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Institution: | (1) Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, P.R. China;(2) College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, P.R. China;(3) First Institute of Oceanography, State Oceanic Administration of China, Qingdao, P.R. China |
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Abstract: | Dissolved concentrations of Cu, Pb, Zn, and Cd were measured in the Changjiang estuary and its adjacent waters. The results
indicate that the ranges of dissolved heavy metals in the studied waters are as follows: Cu = 1.0−6.9 μg/L, Pb = 0.10−0.39
μg/L, Zn = 3.2−9.1 μg/L, and Cd = 0.011−0.049 μg/L. The behavior of the dissolved Cu was essentially conservative, but a high
scatter was observed for the high salinity samples, and it is the same with Zn and Pb. The overall concentrations of dissolved
Cd increase with the salinity. There were no differences between the surface, middle, and bottom layer for Cu, Pb, Zn, and
Cd. Seasonal changes of their averages were not obvious on the whole. River discharges, sedimentary dynamics, and biological
processes might determine the profiles of heavy metals.
The text was submitted by the authors in English. |
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