基于GMS对典型石油烃场地地下水中污染物运移模拟研究
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摘要
为探究城市典型石油烃污染场地地下水污染物运移规律,以珠三角某有机化工污染场地为研究对象,在结合水文地质条件调查和地下水污染源与污染途径分析的基础上,运用GMS软件建立了研究区地下水流场模型,对场地地下水中石油烃污染物的时空分布特征和运移规律进行了模拟预测研究。研究结果表明:在模拟期内污染羽在潜水含水层与微承压含水层中最大扩散面积分别达到了644 m~2、3219 m~2,潜水中预测的污染物浓度峰值为60 mg/L,微承压水中预测的污染物浓度峰值为6.6 mg/L;其中对流-弥散作用是石油烃污染物迁移的主要驱动力,污染物在迁移过程中由于生物降解及吸附作用污染物浓度持续衰减,这可为场地调查和场地修复中污染物运移范围的预估提供参考。
To explore the regularity of the groundwater contamination transport in a typical petroleum hydrocarbon site of a city, an organic chemical contaminated site in the Pearl River Delta is chose as the research subject. Based on the investigation of hydrogeological conditions and the analysis of sources and pollution of groundwater, a groundwater flow model of the area is developed by GMS, which simulates and predicts the spatial and temporal distribution and characteristics as well as the regularity of transport of petroleum hydrocarbon pollutants in groundwater. The research shows that during the simulation, the maximum diffusion of pollutant plume in unconfined aquifer and micro-confined aquifer were 644 and 3219 square meters respectively, the peak of pollutant concentration which was predicted in unconfined aquifer was 60 mg/L, while that in micro-confined aquifer was 6.6 mg/L. Convection-dispersion effect is the main driving force for the transport of petroleum hydrocarbon pollutants, and during the transport, the pollutant concentration attenuates gradually due to biodegradation and absorption. The result of the research may provide a reference for the prediction of pollutant transport scope in site investigation and remediation.
To explore the regularity of the groundwater contamination transport in a typical petroleum hydrocarbon site of a city, an organic chemical contaminated site in the Pearl River Delta is chose as the research subject. Based on the investigation of hydrogeological conditions and the analysis of sources and pollution of groundwater, a groundwater flow model of the area is developed by GMS, which simulates and predicts the spatial and temporal distribution and characteristics as well as the regularity of transport of petroleum hydrocarbon pollutants in groundwater. The research shows that during the simulation, the maximum diffusion of pollutant plume in unconfined aquifer and micro-confined aquifer were 644 and 3219 square meters respectively, the peak of pollutant concentration which was predicted in unconfined aquifer was 60 mg/L, while that in micro-confined aquifer was 6.6 mg/L. Convection-dispersion effect is the main driving force for the transport of petroleum hydrocarbon pollutants, and during the transport, the pollutant concentration attenuates gradually due to biodegradation and absorption. The result of the research may provide a reference for the prediction of pollutant transport scope in site investigation and remediation.
引文
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[13]吴吉春,薛禹群,黄海,等.山西柳林泉局部区域溶质运移二维数值模拟[J].水利学报,2001,(8)38-42.
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[2]赵勇胜.地下水污染场地风险管理与修复技术筛选[J].吉林大学学报(地球科学版),2012,42(5)1426-1432.
[3]刘明柱,陈鸿汉,胡丽琴.北方某城市浅层地下水中有机污染物迁移转化的数值模拟研究[J].中国地质,2005,32(3):507-511.
[4]姚丽利,胡立堂,龚芳芳,等.北京市平原区地下水开采量反演的数值模拟方法[J].北京师范大学学报(自然科学版),2017,53(4):436-441.
[5]姜凤成,李义连,杨国栋,等.某化工场地地下水中污染物运移模拟研究[J].安全与环境工程.2017,24(2):8-15.
[6]沈媛媛,蒋云钟,雷晓辉,等.地下水数值模拟中人为边界的处理方法研究[J].水文地质工程地质质,2008,(6):12-15.
[7]Douchko R,Franci G,Wolfgang D.The impact of hydrochemical boundary conditions on the evolution of limestone karst aquifers[J].Journal of Hydrology,2003,276(1-4):240-253
[8]高小文,吕敬,李秀娟,等.铜矿尾矿库污染物在地下水中运移规律数值模拟[J].水资源与水工程学报.2017,28(2)120-125.
[9]薛禹群.地下水动力学[M].北京:地质出版社,1986:28-45.
[10]ZHENG C,WANG P.MT3DMS:A Modular three-dimensional multispecies transport model for simulation of advection,dispersion and chemical reactions of contaminants in groundwater systems;documentation and User’s Guide.University of Alabama,1999.
[11]Michael G.Mc Donald,Arlen W.Harbaμgh.A modular three-dimensional finite-difference ground-water flow model:U.S.Geological Survey Techniques of Water-Resources Investigations[M].Washington:united states government printing office.1988.
[12]陆海建,蓝俊康,黎容伶.广西平果铝赤泥堆场对岩溶含水层污染风险评价[J].安全与环境学报,2015,15(3):295-300.
[13]吴吉春,薛禹群,黄海,等.山西柳林泉局部区域溶质运移二维数值模拟[J].水利学报,2001,(8)38-42.
[14]邓红卫,贺威.防渗帷幕对污染物阻滞的数值模拟[J].环境工程学报,2015,9(7)3235-3239.
[15]Bennett G D,Zheng Chunmiao.地下水污染物迁移模拟(第2版).孙晋玉,卢国平译.北京:高等教育出版社,2009
[16]赵春兰,凌成鹏,吴勇,等.垃圾渗滤液对地下水水质影响的数值模拟预测:以冕宁县漫水湾生活垃圾填埋场为例[J].环境工程,2017,35(2):163-167.
[17]丁爱中,杨双喜,张宏达.地下水砷污染分析[J].吉林大学学报(地球科学版),2007,37(2)319-325.