摘要
随着煤层气开发利用商业化进程推进,煤层气井排出水作为开采过程中的副产品对环境的影响越来越引起人们的关注。以沁水盆地为研究区域,根据地下水流向将沁水盆地划分为5个区块。对采集区块内40口煤层气井的排出水水样中的TOC、典型阴离子、重金属离子以及有机物进行了测定,分析其污染特征,并根据《地下水质量标准》进行评价。分析表明各区块萘和Cl-质量浓度高,井位质量浓度差别大。对于Cr,Mn,Ni,沁水区块Mn质量浓度较高,襄垣、太原和阳泉区块中Cr质量浓度较高。不同区块间水质污染特征存在差异,沁水和长治区块有机物污染明显;除长治区块外,其他区块普遍受到重金属污染。评价结果表明:在所研究的5个区块中,排出水整体F-污染最为严重,平均超标7.32倍;有机物污染在沁水区块表现突出,其中苯酚、甲基酚和萘分别超标4.4倍、4.21倍、2.19倍;重金属主要表现为Cr污染,襄垣区块平均超标1.55倍,太原区块平均超标2.71倍,阳泉区块平均超标3.11倍。襄垣区块水质较差,其他区块均为极差,应引起足够重视。
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.
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2018年第2期63-73,共11页
Journal of Henan Polytechnic University（Natural Science）
基金
山西省煤炭联合基金资助项目(2013012016)
河南省高校科技创新团队项目(16IRTSTHN014)
河南省科技攻关项目(152102310330)
关键词
沁水盆地
煤层气井排出水
污染特征
污染评价
Qinshui basin
coalbed methane produced water
pollution characteristics
pollution assessment
