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重工业区高脆弱岩溶含水层中多环芳烃污染的初步研究

孔祥胜 苗迎 栾日坚 杨奇勇 秦愫妮

孔祥胜, 苗迎, 栾日坚, 杨奇勇, 秦愫妮. 重工业区高脆弱岩溶含水层中多环芳烃污染的初步研究[J]. 中国岩溶, 2015, 34(4): 331-340.
引用本文: 孔祥胜, 苗迎, 栾日坚, 杨奇勇, 秦愫妮. 重工业区高脆弱岩溶含水层中多环芳烃污染的初步研究[J]. 中国岩溶, 2015, 34(4): 331-340.
KONG Xiang-sheng, MIAO Ying, LUAN Ri-jian, YANG Qi-yong, QIN Su-ni. Preliminary study on contaminant of polycyclic aromatic hydrocarbons in vulnerable karst aquifer in a heavy industry district[J]. CARSOLOGICA SINICA, 2015, 34(4): 331-340.
Citation: KONG Xiang-sheng, MIAO Ying, LUAN Ri-jian, YANG Qi-yong, QIN Su-ni. Preliminary study on contaminant of polycyclic aromatic hydrocarbons in vulnerable karst aquifer in a heavy industry district[J]. CARSOLOGICA SINICA, 2015, 34(4): 331-340.

重工业区高脆弱岩溶含水层中多环芳烃污染的初步研究

基金项目: 中国地质科学院岩溶地质研究所所控基金(编号:2015007);西南主要城市地下水污染调查评价项目(编号: 1212011121166)

Preliminary study on contaminant of polycyclic aromatic hydrocarbons in vulnerable karst aquifer in a heavy industry district

  • 摘要: 以西南岩溶地区某市重工业区为研究对象,采集水文地质单元内地下水和土壤样品,利用气相色谱-质谱法(GC-MS)测试美国环保署16 种多环芳烃(PAHs)优控物。初步研究表明,研究区地下水16种PAHs均被检出,浓度为1 135.79~1 361.26 ng/L,以菲、蒽、萘、屈、芘为主;地下水处于中等污染程度,其中苯并[a]蒽、屈、苯并[b]荧蒽、苯并[k]荧蒽4种浓度超过美国EPA2009《国家推荐的优先有毒污染物水质标准》标准;PAHs特征比值显示含水层中的PAHs来源于燃煤和炼焦污染源,与钢铁厂和化肥厂排放的特征有机污染物一致。研究区污染源下游大面积区域地下水已经受到PAHs污染,且出现排泄区PAHs浓度高于径流区的现象,岩溶含水层PAHs的污染主要受两方面影响:一是洼地、裂隙发育,断层破碎带和强风化白云岩等为PAHs在含水层中的运移提供了有利条件,同时污染源区内地下水大量开采加速了污染物向地下水的入渗;二是水电站建坝蓄水发电,江水水位抬高,河岸地下水排泄速度减慢,可能致使岩溶含水层中PAHs的自净能力减弱。生态风险评价显示地下水中菲、蒽、芘、苯并[a]蒽、苯并[b]荧蒽处于重污染风险,应采取措施降低污染风险。

     

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  • 刊出日期:  2015-08-25

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