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《Resources and Environment in the Yangtze Basin》 2017-02
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SPATIAL DISTRIBUTION, CONTAMINATION ASSESSMENTS AND SOURCES OF HEAVY METALS IN SURFACE WATER FROM THE NANFEI RIVER

WANG Xiu;WANG Zhen-xiang;PAN Bao;ZHOU Chun-cai;LIU Gui-jian;School of Resources and Environmental Engineering, Hefei University of Technology;School of Earth and Space Sciences,University of Science and Technology of China;  
Based on the water quality investigation data of the Nanfei River during the wet and dry season, the single factor water quality identification index method and a improved fuzzy comprehensive evaluation model were employed to evaluate the quality status of heavy metals. The main pollution factors and the priority control section were determined. The principal component analysis(PCA) was applied to estimate the sources of heavy metal. The results showed that the average concentrations of Cr, Cu, Pb in dry season were higher than that in wet season, but the average concentrations of As, Cd in wet season were higher than that in dry season. The results of single factor water quality identification index method showed that the main pollution factors of heavy metal pollution in river Nanfeihe was Cd. The concentration of Cd in each sampling point exceeded the Class V according to standards of the national groundwater environmental quality during the wet and dry season. The highest value is 2.6 times Class V standard. The improved fuzzy comprehensive evaluation results showed that the water quality of the Nanfei River basically belonged to Class II according to standard.The pollution of the section of Qianshan North Road Bridge was the most serious, and this section belongs to the priority control section. The water quality of the Nanfei River belonged to Class III in dry season. Overall, the water quality of Nan Fei River reached the goal of water body function area. The contamination sources of heavy metals through the principal component analysis(PCA) revealed that the heavy metals contamination in Nan Fei River were caused by pesticides and fertilizers and wastewaters from mechanical manufacturing and electroplating industry and the boat in the river.
【Fund】: 安徽省环境保护科研课题(2015-011)~~
【CateGory Index】: X824;X52
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