黄河中下游水体中邻苯二甲酸酯的分布特征_沙玉娟

中国环境科学2006,26(1)：120~124ChinaEnvironmentalScience黄河中下游水体中邻苯二甲酸酯的分布特征沙玉娟1,夏星辉1*,肖翔群2(1.北京师范大学环境学院,水环境模拟国家重点实验室,北京100875；2.黄河水资源保护科学研究所,河南郑州450004)摘要：采集了黄河中下游12个断面的河水、沉积物和悬浮颗粒物样品,用气相色谱法对样品中邻苯二甲酸酯类(PAEs)有机物含量进行测定,分析其在黄河水体中的分布特征.结果表明,在小浪底-东明桥之间,干流水相PAEs浓度分布范围为3.99×10-3~45.45×10-3mg/L;支流浓度范围为15.80×10-3~49.53×10-3mg/L,远远高于干流的浓度.在所研究支流中,洛阳石化污水沉积相中的PAEs含量最高,达到331.70mg/kg;PAEs在干流各断面沉积相中的浓度变化范围为30.52~85.16mg/kg;沿程变化主要受支流的汇入和各处沉积物理化性质的影响.在干流焦巩桥至东明桥区间,悬浮颗粒相的PAEs总量水平沿程呈上升趋势,浓度由40.56mg/kg增至94.22mg/kg.邻苯二甲酸双(2-乙基己基)酯(DEHP)和邻苯二甲酸二丁酯(DBP)所占比例相对较大.干流与支流水相中的DEHP,除孟津和焦巩大桥处未超标,其余各处均已超标.关键词：邻苯二甲酸酯；沉积物；黄河中图分类号：X132文献标识码：A文章编号：1000-6923(2006)01-0120-05DistributioncharactersofphthalicacidesterinthewatersmiddleandlowerreachesoftheYellowRiver.SHAYu-juan1,XIAXing-hui1*,XIAOXiang-qun2(1.StateKeyLaboratoryofWaterEnvironmentSimulation,SchoolofEnvironment,BeijingNormalUniversity,Beijing100875,China；2.InstituteofWaterResourceProtectionoftheYellowRiver,Zhengzhou450004,China).ChinaEnvironmentalScience,2006,26(1)：120~124Abstract：Samplesofwater,sedimentandsuspendedparticulateswerecollectedin12sectionsinthemiddleandlowerreachesoftheYellowRiver.Phthalicacidesters(PAEs)contentsinthesamplesweredeterminedusingGasChromatogramtechnique;andtheirdistributioncharactersinthewatersoftheYellowRiverwereanalyzed.BetweentheXiaoLangdiandDongmingBridge,PAEsconcentrationinwaterphaseofthemainriverrangedfrom3.99×10-3to45.45×10-3mg/L;andthatofthetributariesrangedfrom15.80×10-3to49.53×10-3mg/L,beingmuchhigherthanthoseofthemainriver.Inthestudiedtributaries,thePAEscontentsinsedimentphaseoftheLuoyangpetrochemicalsewagewasthehighest,reaching331.70mg/kg;thevariationrangeofPAEsconcentrationinsedimentphaseofthemainriverwas30.52~85.16mg/kg;thisvariationalongthemainriverwasinfluencedmainlybytheconvergenceofthetributariesandphysical-chemicalcharacteristicsofthesedimentineachsite.ThetotalamountlevelofPAEsinsuspendedparticulatestendedtoincreasealongJiaogongBridgetoDongmingBridgeareasfrom40.56mg/kgto94.22mg/kg.Inthestudiedphthalicacidest