研究报告
王尊波,孙玉川,梁作兵,江泽利,廖昱,谢正兰,张媚.重庆青木关地下河流域水中多环芳烃的污染和迁移特征[J].环境科学学报,2016,36(3):812-819
重庆青木关地下河流域水中多环芳烃的污染和迁移特征
- Contamination and migration of polycyclic aromatic hydrocarbons in water of Qingmuguan Karst underground river catchment in Chongqing, China
- 基金项目：重庆市科委院士专项(No.cstc2013jcyjys20001);中央高校基本科研业务费专项(No.XDJK2013B021);西南大学博士基金项目(No.SWU110258);应对全球气候变化地质调查综合研究项目(No.12120113006700);岩溶动力学重点实验室开放课题项目(No.KDL201104,KDL201303)
- 作者
- 单位
- 王尊波
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 孙玉川
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 梁作兵
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 江泽利
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 廖昱
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 谢正兰
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 张媚
- 西南大学地理科学学院/三峡库区生态环境教育部重点实验室, 重庆 400715
- 摘要：为探究典型岩溶槽谷区重庆青木关地下河流域水中多环芳烃(PAHs)的含量、组成、来源及污染特征,于2014年对青木关地下河流域中3种不同类型水体进行了连续7个月的采样监测,并利用气相色谱-质谱联用仪(GC-MS)测定了水中16种优控多环芳烃含量.结果表明,地下河水、表层岩溶泉水和地表水中∑PAHs含量变化范围分别为73.9~339.0、76.2~212.0和81.9~272.0 ng·L-1,平均值分别为134、138和173 ng·L-1;PAHs组成以2~3环为主,平均占总含量的82%.通过对PAHs的组成对比分析表明,PAHs在迁移过程中地下环境介质对PAHs存在吸附作用.燃烧源是流域内水中PAHs的主要来源,PAHs污染水平较低,个别中低环PAHs含量超过水质标准,高环PAHs超标仅出现在2014年11月的地表水和地下河出口水样中.
- Abstract：In order to explore the concentrations, compositions, sources and contamination characteristics of polycyclic aromatic hydrocarbons (PAHs) in waters of typical karst valley area of Qingmuguan underground river watershed in Chongqing, three different types of waters had been monitored and sampled for 7 months in 2014, and the concentrations of sixteen priority PAHs in waters were measured by Gas Chromatography-Mass Spectrometer(GC-MS). Results showed that the concentrations of PAHs in groundwater, epikarst springs and surface waters of Qingmuguan watershed ranged from 73.9 to 339 ng·L-1, 76.2 to 212 ng·L-1 and 81.9 to 272 ng·L-1 with average concentrations of 134 ng·L-1, 138 ng·L-1 and 173 ng·L-1, respectively. The PAHs facies were characterized by (2~3) rings in waters, accounting for 82% of the total PAHs concentrations. The underground environmental medium showed an obvious adsorption on PAHs during their migration process revealed by the compositions of PAHs in different waters. The PAHs were primarily derived from the combustion sources in the watershed. The PAHs pollution level was low, of which the concentrations of some low MW PAHs in all waters exceeded the limitation of the water quality standards, and only the concentrations of high MW PAHs in surface and outlet waters exceeded the limitation of the water quality standards in November, 2014.
- Key words：polycyclic aromatic hydrocarbons contamination migration underground river Chongqing Qingmuguan
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