Pollution characteristics and assessment of coalbed methane produced water in Qinshui Basin
ZHAO Tongqian
LI Peng
TAI Chao
WANG Baoyu
HU Bin
Abstract：With the commercialization of coalbed methane,the influence of the produced water which is the residual product of the mining process on the environment has attracted wide attention.Qinshui basin was divided into five blocks base on the groundwater flow direction.The samples of produced water from forty coalbed methane wells in the study area were analyzed,which including total organic carbon,typical anions,heavy metal ions and organic compounds.The pollution characteristics were analyzed and evaluated according to the groundwater quality standard.The results show that each block has high content of naphthalene and chloride ion,and varied across wells.For Cr,Mn,Ni,the high content of Mn in Qinshui block,the high content of Cr in Xiangyuan,Taiyuan and Yangquan block.Water quality pollution characteristics are differences between blocks.Organic pollution is heavy in Qinshui and Changzhi block.In addition to the Changzhi block,other blocks are generally polluted by heavy metals.Assessment results show that the average fluoride exceed the standard 7.32 times totally.In Qinshui block,organics pollution is most serious,with phenol,methyl phenol and naphthalene exceeding the standard by 4.4 times,4.21 times and 2.19 times respectively.For heavy metal pollution,Cr is the most prominent.Xiangyuan block exceeding the standard 1.93 times,Taiyuan block exceeding the standard 2.71 times and Yangquan block exceeding the standard 3.11 times.The water quality of Qinshui basin is polluted and need to pay more attention.
Keywords：Qinshui basincoalbed methane produced waterpollution characteristicspollution assessment
Publication Date：2018-03-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 63-73 )