| 输水期间于桥水库流域水体中溶解态多环芳烃的分布特征与风险 |
| 摘要点击 1778 全文点击 883 投稿时间：2016-01-08 修订日期：2016-03-19 |
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| 中文关键词 多环芳烃 于桥水库 污染特征 健康风险 生态风险 |
| 英文关键词 polycyclic aromatic hydrocarbons (PAHs) Yuqiao Reservoir pollution characteristics health risk ecological risk |
| 作者 | 单位 | E-mail | | 昌盛 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012 | changsheng83@163.com | | 赵兴茹 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012 | | | 付青 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012 | fuqing@craes.org.cn | | 郭睿 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012 | | | 王山军 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012 | |
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| 中文摘要 |
| 为调查输水期于桥水库流域水中多环芳烃(PAHs)的分布特征,采用气相色谱-质谱法对该区16种US EPA优先控制的PAHs进行了分析,并对PAHs的健康风险和生态风险进行了评估.结果表明,在18个点位采集的水样中均有PAHs检出,且上游水域和库区PAHs组分和浓度均存在着显著差异.上游水域水体(除洒河大桥点位外)中的PAHs以2~3环为主,其百分比介于86%~95%,∑PAHs浓度介于13.7~104.1ng·L-1间,其中大黑汀水库渔业养殖密集区水体中PAHs污染水平较高;库区水体中低环数和高环数PAHs含量相当,∑PAHs浓度介于1.6~3512.5 ng·L-1间,其中库区北岸水中PAHs浓度最高.Flu/Pyr、Fla/(Fla+Pyr)比值分析表明,于桥水库流域PAHs主要来自村镇居民燃煤供暖、生物质燃烧.分别采用US EPA健康风险评价模型和Kalf等使用的商值法对PAHs的饮水致癌风险和生态风险进行了评估,结果显示,库区水体的饮水致癌风险水平超过了10-6,以及库区B[a]A、B[k]F、Bap的商值(实际浓度/最大允许参考浓度)也均大于1,说明库区水体PAHs引发的致癌风险和生态风险均应当引起重视. |
| 英文摘要 |
| In order to understand the pollution status of polycyclic aromatic hydrocarbons (PAHs) in the groundwater of Yuqiao Reservoir Watershed, the 16 US EPA priority control PAHs in the groundwater of this region were analyzed by gas chromatography-mass spectrometry. Not only the distribution characteristics and sources of PAHs, but also the potential probabilistic carcinogenic risk through drinking water and the ecological risk were assessed in this study. The results showed that PAHs could be detected in all the 18 samples. The results showed that the contents and concentration of PAHs were different between the upstream river and Yuqiao Reservoir. For the upstream river, the concentrations of ∑PAHs ranged from 13.7 ng·L-1 to 104.1 ng·L-1, and the low-ring number PAHs was dominant except the site of Sahe river bridge, and 2-3 ring number PAHs accounted for about 86%-95% of the ∑PAHs. The heavier contaminant level was monitored among the intensive fishery breeding areas located in Dahei river reservoir. For the Yuqiao Reservoir, the mass of 2-3 ring and 4-6 ring number PAHs was similar and the concentration of ∑PAHs ranged from 1.6 ng·L-1 to 3512.5 ng·L-1. The highest ∑PAHs was measured at the sampling sites located in the north of reservoir. The resource pollution of PAHs in this region was appointed by the molecular ratio of Flu/Pyr and Fla/(Fla+Pyr) and it showed that the combustion of coal and biomass was predominant during the sampling campaign. The health risk of drinking water in the study area was evaluated using the recommended method by US EPA and the cancer risk exceeded 10-6. The ecological risk was assessed by the value of risk quotient (RQ) adopted by Kalf and the RQs of B[a]A, B[k]F and BaP were all higher than 1. The above results indicated that the government should pay enough attention to the health risk and ecological risk of PAHs in the water of reservoir. |
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