第9卷第3期2011年6月南水北调与水利科技South-to-NorthWaterDiversionandWaterScience&TechnologyVOL9No.3Jun2011doi:10,3724/SP.J.1201.2011.03109某水源地地下水四氯化碳污染特征分析郭英1,田西昭2⋯,张立宝1,’何微4,单强3(1.唐山市自来水公司,河北唐山063004;2.桂林理工大学环境科学与工程学院,广西桂林541004;3.河北省环境地质勘查院,石家庄050021;4.河北省地质矿产局第二地质大队,河北唐山063004)摘要:通过对某水源地地下水的四氯化碳污染调查和日常监测数据分析。研究了该水源地四氯化碳污染晕的形态和变化特征,并选取典型水源井对其四氯化碳动态特征进行了分析。在污染发现初期,污染面积为2.73kmz,最高污染浓度为249.7/-g/L,随着后期污染治理工作的开展,污染面积减小到1.24kmz,最高污染浓度下降到3.62ttg/L。分析认为,污染晕形态在空间分布上主要受地下水流场的控制,同时受降水量、地下水位标高及开采量等多种因素控制,污染物由北区井群向南区井群扩散。单井四氯化碳含量动态则呈现出南北区的相反特征:在北区,四氯化碳含量随着地下水位的上升而上升,并随地下水流向南扩散;在南区,四氯化碳含量随着地下水位的上升而下降,并随地下水流向地下水漏斗中心汇集。这是由于赋存于SDl井附近包气带中的四氯化碳尚未清除造成的。关键词:孔隙水;水源井;四氯化碳;污染晕;动态特征;包气带;污染治理中图分类号:X523文献标识码:A文章编号:1672—1683(2011)03-0109-05CharacteristicsofCarbonTetrachloridePollutioninGroundwaterinaWaterSourceGUO-Yin91。TLd小J-Xi—zhaoz”,ZHANGLi-ba01,HEWei4,SHANOiangs(1.TangshanWaterSupplyCo.,Tangshan063004,China;2.CollegeofEnvironmentalScienceandEngineering,GuilinUniversityofTechnology。Guilin541004,China;3.HebeiInstituteofEnvironmentalGeologyExploration,Shijiazhuang050021,China;4.No.2GeologicalTeamofHebeiBureauofGeology&MineralResources,Tangshan063004,China)Abstract:Basedontheinvestigationandeverydaymonitoringdataofthecarbontetrachloride(cT)pollutioninthegroundwateroccurringatawaterSOurcezone,thispaperstudiestheformofthecontaminantplumeasweltasthechangingfeatures,andalSOitanalyzesthedymm.iccharacteristicsoftheCTinseveralchcIsenwaterSOurcewells.Thecontaminatedar毁Ttattheinitialstagereached2.73kmz。withthenlaxcontaminantconcentrationof249.7tLg/LAsthepollutioncontroliscarriedOUtatthelaterstage,thecontaminatedareareducesto1.24km2,withthemaxcontaminantconcentrationreducestO3.62弘g/LTheresultsindicatedthattheformofcontaminantplumewasspatiallydeterminedbythegroundwaterflowfieldasaprimaryfactor,andotherfactorsincludedprecipitation。elevationofgroundwaterlevelaswellastheyieldetc.ThecontaminantplumeextendsforlnthenorthernwellstOtheSOuthernones.IntermsofthedynamiccontentoftheCTinasinglewell,it'sq1=titedifferentinthenorthernandsouthernareas:forthefoITfler,theconcentrationincreaseswiththerisingofthegroundwater,andtheCTdiffusionmovessouthwardsalongwiththegroundwaterflow;forthelatter,theconcentrationdecreaseswiththerisingofthegroundwa—ter.andthegroundwaterflowcarriestheCTtowardsthecenterofthefunnel-shapedzone.Thereasonforcausingsuchadiffer-eneeiSthatthe口formedintheaerationzoneneartheSDlwellhasn'tbeenclearedaway.Keywonb:porewater,watersourcewell;carbontetrachloride;contaminantplume;dynamiccharacteristics;theaerationzone;pollutioncontrol四氯化碳是有机化工厂、石油化工厂以及机电设备等企业生产中常用的溶剂,以商业用途用于工业生产已100余年叫。四氯化碳相当稳定很难分解,在地下水中,因挥发扩散较少。在没有生物分解的情况下,地下水一旦受到四氯化碳污染,很难自净消除脚。该物质...