首页 | 官方网站   微博 | 高级检索  
     

汉江下游水体和鱼体多环芳烃分布特征及健康风险
引用本文:汪红军,郑金秀,李嗣新,梁友光,池仕运,周连凤,熊文.汉江下游水体和鱼体多环芳烃分布特征及健康风险[J].水生态学杂志,2016,37(6):51-58.
作者姓名:汪红军  郑金秀  李嗣新  梁友光  池仕运  周连凤  熊文
作者单位:水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室,水利部中国科学院水工程生态研究所 水利部水工程生态效应与生态修复重点实验室
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
摘    要:研究汉江下游水体及鱼体多环芳烃(PAHs)含量,进行健康风险评价,为汉江下游PAHs污染防治提供基础资料。在汉江下游8个代表性水厂取水口采集水样及在相应江段渔获物中选取7种典型鱼,利用气相色谱质谱联用仪(GC-MS)测定水样及鱼肌肉中16种优控多环芳烃的含量,并用美国环保局(USEPA)推荐的健康风险评价模型进行健康风险评价。8个采样断面水体中Nap、Ace、Phe、An、Ba A、Bk F检出率为100%,Bb F、In D等均未检出,其他多环芳烃检出率分别为Fle 50%、Acy 25%、Flu 62.5%、Pyr 25%、Chr 25%、Ba P 75%、Dah A 12.5%、Bghi P25%。汉江下游水体中16种PAHs总含量平均值为100.67 ng/L,最小值为65.8 ng/L,最大值为155.94 ng/L。结构组成主要以低环为主(70.4%),中环其次(22.2%),高环最低(7.4%)。7种鱼体内16种优控PAHs的含量范围为(43.42±0.50)~(113.06±3.57)ng/g,平均组成低环、中环、高环PAHs分别占总PAHs的57.9%、20.2%、21.9%。高环在鱼体内比例显著高于在水体中,表明高环PAHs在鱼体内的富集能力更强。饮用水健康风险估算总量为2.25×10~(-8)~5.32×10~(-8)/a,总体水平为风险不明显;7种鱼食用的PAHs健康风险估算范围为8.00×10~(-7)~2.08×10~(-6)/a,总体评价为可接受水平,均低于国际辐射防护委员会推荐的最大可接受风险水平5.0×10~(-5)/a,部分鱼食用的人体健康风险值高于USEPA建议的可接受风险1.0×10~(-6)/a。

关 键 词:汉江下游  多环芳烃  健康风险  水体  鱼体
收稿时间:2016/6/12 0:00:00
修稿时间:8/5/2016 12:00:00 AM

Distribution Characteristics and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Water and Fish of Lower Hanjiang River
WANG Hong-jun,ZHANG Jin-xiu,LI Si-xin,LIANG You-guang,CHI Shi-yun,ZHOU Lian-feng and XIONG Wen.Distribution Characteristics and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Water and Fish of Lower Hanjiang River[J].Journal of Hydroecology,2016,37(6):51-58.
Authors:WANG Hong-jun  ZHANG Jin-xiu  LI Si-xin  LIANG You-guang  CHI Shi-yun  ZHOU Lian-feng and XIONG Wen
Abstract:Gas chromatograph-mass spectrometer (GC-MS) was used to measure the content of 16 kinds of priority polycyclic aromatic hydrocarbons (PAHs) in water samples of water intakes of 8 representative water works and 7 species of typical fish muscle samples from the lower reaches of Hanjiang River and analyze the distribution characteristics of PAHs in water and fish. In addition, the health risk assessment model recommended by U.S. Environmental Protection Agency (USEPA) was applied to conduct a health risk assessment on the safety of drinking water and edible fish. Results showed that the detection rate of Nap, Ace, Phe, An, BaA and BkF in the water of 8 sampling cross-sections was 100% and BbF and InD were not detected. The detection rates of other PAHs were 50% for Fle, 25% for Acy, 62.5% for Flu, 25% for Pyr, 25% for Chr, 75% for BaP, 12.5% for DahA and 25% for BghiP. The average, minimum and maximum values of total content of 16 kinds of PAHs in water in the lower reaches of Hanjiang River were 100.67ng/L, 65.8ng/L and 155.94ng/L respectively. The structural composition of PAHs was mainly dominated by low molecular weight (LMW) PAHs (70.4%), followed by medium molecular weight (MMW) PAHs (22.2%). High molecular weight (HMW) PAHs took up the lowest proportion, namely 7.4%. The content of 16 kinds of priority PAHs in 7 species of fish varied from (43.42±0.50ng/g) to (113.06±3.57ng/g). LMW PAHs, MMW PAHs and HMW PAHs accounted for 57.9%, 20.2% and 21.9% of total content of PAHs respectively. From the composition structure of PAHs in water and fish, the proportion of HMW PAHs in fish was significantly higher than that in water, indicating that HMW PAHs had stronger enrichment ability in fish. The total estimated content of PAHs based on the health risk of drinking water was from (2.25E-08)/a to (5.32E-08)/a and the overall level was in obviously low risk. The estimation scope of health risk of PAHs eaten by fish varied from (8.00E-07)/a to (2.08E-06)/a and overall evaluation was in an acceptable level, lower than the maximum acceptable risk level (5.0E-05)/a recommended by International Commission on Radiological Protection. Meanwhile, the human health risk value of some PAHs eaten by fish was higher than the acceptable risk (1.0E-06)/a recommended by USEPA, indicating certain health risk.
Keywords:Lower reaches of Hanjiang River  Polycyclic Aromatic Hydrocarbons  health risk  water  fish
本文献已被 CNKI 等数据库收录!
点击此处可从《水生态学杂志》浏览原始摘要信息
点击此处可从《水生态学杂志》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号