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Contamination patterns in river water from rural Beijing: A hydrochemical and multiple stable isotope study TEXT SIZE: A A A
The pollution of urban river has reached a critical level. In the present study, the hydrochemical composition of local surface water collected during two seasons from the rural area around urban Beijing, China, was examined. Concentrations of selected cations and anions reveal the temporal and spatial distribution of anthropogenic and natural pollution. Multiple stable isotopes (delta N-15(oitrate), delta O-18(nitrate). delta S-34(sulfate), delta O-18(sulfate), Delta S-33(sulfate)) analyses were applied for detecting of specific hydrochemical processes and identifying the major sources of contamination.

Twenty-eight percent of the river water samples from the wet season and 34% from the dry season exhibit a minor water quality of class IV (poor) and below due to high pH values as well as high nitrate, sulfate and fluoride concentrations. This water is hazardous for human health and the aquatic ecology. The seemingly better liver water quality in the wet season is caused by higher precipitation and, hence, dilution of the water constituents. Multiple isotopes identify urban wastewater as the prime pollution source.The higher fraction of deteriorated river water in the southern rural area (42%) compared to the north (24%) points to a higher contribution of urban effluents to the downstream rivers in the rural south. It can, thus, be concluded that less discharge of wastewater to the local surface and subsurface environments by better controls of public and private sewage disposal combined with the renewal of leaking sewer pipes would reduce the risk of anthropogenic contamination of river water. (C) 2018 Elsevier B.V. All rights reserved.
 

Publication name

 SCIENCE OF THE TOTAL ENVIRONMENT, 654 226-236; 10.1016/j.scitotenv.2018.10.423 MAR 1 2019

Author(s)

 Peters, Marc; Guo, Qingjun; Strauss, Harald; Wei, Rongfei; Li, Siliang; Yue, Fujun

Corresponding author(s) 

 GUO Qingjun 
 guoqj@igsnrr.ac.cn  
 -Chinese Acad Sci, Ctr Environm Remediat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
 -Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China

Author(s) from IGCAS   YUE Fujun

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