Distribution, Sources and Impact Factors of Arsenic in the Major Rivers of Eastern China

Abstract

Abstract:

This paper aims to investigate the concentration, partitioning and sources of As in the major rivers of eastern China.Samples of filtered water and suspended particulate matter were sampled, from more than 30 rivers at the lower reaches in 2007 and 2008.The results indicated that the concentration of dissolved As is averaged to 3.1 μg/L, significantly higher than most other rivers in the world.The frequency distribution histogram with more than one peak showed that most of the rivers have been obviously polluted by anthropogenic activities, which was also confirmed by the enrichment factors (EF) of the suspended particulate matter samples.The partitioning of As in the river was dominated by the dissolved phase other than the particulate one.The distribution of As in the two phases was controlled by water pH and temperature.The concentration of As is also influenced by rock type in the river basins and is significantly higher in the rivers whose catchments were mostly covered by volcanic and pyroclactic rocks, whereas the content was relatively lower in the rivers with their catchments covered by the granite and metamorphic rocks.The sources of anthropogenic pollution of typical rivers were presumed mainly coming from industrial and domestic waste water. The order of main four rivers contribution was that, Haihe(46.7%)＞Huanghe(18.7%)＞Changjiang(13.5%)＞Zhujiang(8.3%)

Key words: arsenic(As), distribution, source, anthropogenic pollution, rivers of eastern China

LIU Jing-Jing, YANG Zhong-Fang, ZHOU Guo-Hua, JIA Hua-Ji, HOU Jing-Xie, TU Chao, DI Da-Xin. Distribution, Sources and Impact Factors of Arsenic in the Major Rivers of Eastern China[J]. Geoscience, 2012, 26(1): 114-124.

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