滹沱河冲洪积扇深层孔隙水中多环芳烃和酞酸酯的污染水平与饮水健康风险评估

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摘要 2015年2月采集石家庄地区滹沱河冲洪积扇深层孔隙水地下水水样，采用气相色谱-质谱法测定了US EPA优先控制的多环芳烃（PAHs）和酞酸酯（PAEs），并对PAEs的饮水健康风险进行了评估.结果显示，7个采样点均检出PAHs和PAEs，∑PAHs范围为34.4~598.5ng/L，且2~3环PAHs的质量分数介于50%~83%；∑PAEs范围为27.6~25236.7ng/L，其中有3个点位∑PAEs达到20μg/L水平，且7个点位均以DBP、DEHP为主.与国内其他研究区相比，本研究区∑PAHs浓度与国内非岩溶地下水的污染水平接近，而∑PAEs浓度较高.饮水健康风险评估结果显示，仅G2点位的PAHs终生致癌风险指数小于US EPA推荐的可接受的水平（10^-6），其致癌风险可以忽略外，其他点位均具有潜在致癌风险；而对于PAEs饮水终生致癌风险而言，G1、G6、G73个点位的PAEs终生致癌风险也均高于10^-6，因此，研究区深层孔隙水中的PAHs和PAEs污染均应当引起重视.

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	耿梦娇
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关键词 ：滹沱河, 深层孔隙水, 多环芳烃, 酞酸酯, 污染特征, 风险评估

Abstract：In order to investigate the pollution status of polycyclic aromatic hydrocarbons (PAHs) and phthalate esters (PAEs) in the deep shallow pore water of Hutuo River Pluvial Fan, the US EPA priority control PAHs and PAEs in the groundwater of this region were analyzed by gas chromatography-mass spectrometry. The occurrence, distribution characteristics and their potential probabilistic carcinogenic risk through drinking water were also assessed in this present study. The results showed that both PAHs and PAEs could be detected in all the 7deep shallow pore water samples. The concentration of the ∑PAHs was ranged from 34.4 to 598.5ng/L. The percent of the 2~3ring PAHs was accounted about 50%~83%, which indicated that the 2~3ring PAHs was predominated. While the concentration of the ∑PAEs was ranged from 27.6 to 25236.7ng/L and there were three samples that the concentration were reached 20μg/L, and in addition, the DBP and DEHP were the dominant constitutes. As compared to other surveyed groundwater research regions in China, the PAHs pollution level of this research area was closed to the others, however, the PAEs pollution level of this research area was higher than the others. The health risk of drinking groundwater in the study area was evaluated by the recommended method by US EPA. It showed that the cancer risk of PAHs of all the samples were excessed acceptable level (10-6) except G2 sample point. Besides, the cancer risk of G1, G6 and G7 sample were larger than 10-6 for the health risk assessment of PAEs. The results of this study suggested that the quality of groundwater in this research region should be pay enough attention by government.

Key words： Hutuo River groundwater PAHs PAEs pollution distribution health risk assessment

收稿日期: 2016-04-22

PACS:

X821

基金资助:环境保护公益性行业科研专项（201409029）；国家自然科学基金项目（51508539）；国家水体污染控制与治理科技重大专项（2014ZX07405-001）

通讯作者: 昌盛,助理研究员,changsheng@craes.org.cn E-mail: changsheng@craes.org.cn

作者简介: 耿梦娇(1988-),女,河北保定人,硕士,主要从事水环境中有毒有害有机污染物研究.发表论文5篇.

引用本文:

耿梦娇, 昌盛, 刘琰, 王山军, 韩向云. 滹沱河冲洪积扇深层孔隙水中多环芳烃和酞酸酯的污染水平与饮水健康风险评估[J]. 中国环境科学, 2016, 36(12): 3824-3830. GENG Meng-jiao, CHANG Sheng, LIU Yan, WANG Shan-jun, HAN Xiang-yun. Pollution status and health risks of drinking water of the polycyclic aromatic hydrocarbons and phthalate esters in the deep shallow pore water of Hutuo River Pluvial Fan. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(12): 3824-3830.

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http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2016/V36/I12/3824

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