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引用本文:桂雨婷,王健,余建波,皮杰,李德亮.洞庭湖流域湘江铜锈环棱螺(Bellamya aeruginosa)的重金属富集特征及其膳食风险评估.湖泊科学,2019,31(3):724-733. DOI:10.18307/2019.0311
GUI Yuting,WANG Jian,YU Jianbo,PI Jie,LI Deliang.Accumulation characteristics of heavy metals and dietary risk assessment of Bellamya aeruginosa in the Xiangjiang River, Lake Dongting Basin. J. Lake Sci.2019,31(3):724-733. DOI:10.18307/2019.0311
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洞庭湖流域湘江铜锈环棱螺(Bellamya aeruginosa)的重金属富集特征及其膳食风险评估
桂雨婷1, 王健1, 余建波1,2, 皮杰1, 李德亮1,2
1.湖南农业大学动物科学技术学院, 湖南省特色水产资源利用工程技术研究中心, 长沙 410128;2.水产高效健康生产湖南省协同创新中心, 常德 415000
摘要:
洞庭湖流域对湘江湖南段6个城市江段铜锈环棱螺(Bellamya aeruginosa)腹足和内脏团的As、Cd、Pb、Cu、Zn、Cr富集量进行分析,运用单因子污染指数法评价其受污染程度,并分别采用平均每周/每月摄入量法和目标危害系数法对其膳食风险进行评估,旨在为湘江流域居民铜锈环棱螺的消费安全提供参考.结果显示,铜锈环棱螺腹足As、Cd、Pb、Cu和Zn的富集量均值分别为0.92、1.65、0.90、13.01和67.62 mg/kg,Cr未检出,As、Cd、Pb和Cu的超标率分别为87.06%、27.06%、24.72%和2.35%.内脏团As、Cd、Pb、Cu、Zn和Cr的富集量均值分别为9.61、3.21、3.75、33.58、169.05和1.23 mg/kg,As、Cd、Pb、Cu和Cr超标率分别为100%、71.76%、65.88%、14.12%和75.8%.所有江段成人As、Cu和Zn的每周摄入量均值和最高值均低于FAO/WHO食品添加剂联合专家委员会(JECFA)提出的暂定每周耐受摄入量参考值(PTWI),但株洲成人Cd的每月摄入量均值超过其每月耐受摄入量参考值,且最大值是其参考值的3.44倍,永州、湘潭地区成人Cd的每月摄入量最大值也分别是其参考值的1.16和1.68倍.所有江段铜锈环棱螺摄入的单一重金属健康风险值除As外均小于1,但多种重金属复合暴露健康风险值均接近或大于1.结果表明,湘江湖南段6个城市江段铜锈环棱螺均受到一定程度的污染,其中衡阳、湘潭和株洲江段较为严重,且各江段铜锈环棱螺内脏团重金属富集量整体上均高于腹足,故当地居民长期食用后存在潜在的健康风险.
关键词:  湘江  铜锈环棱螺  重金属污染  膳食风险
DOI:10.18307/2019.0311
分类号:
基金项目:国家公益性行业(农业)科研专项经费项目(201503108)、湖南省教育厅重点项目(17A099)和湖南省重点研发计划项目(2017NK2291)联合资助.
Accumulation characteristics of heavy metals and dietary risk assessment of Bellamya aeruginosa in the Xiangjiang River, Lake Dongting Basin
GUI Yuting1, WANG Jian1, YU Jianbo1,2, PI Jie1, LI Deliang1,2
1.Hunan Engineering Technology Research Center of Featured Aquatic Resources Utilization, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, P.R.China;2.Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde 415000, P.R.China
Abstract:
To provide food safety information of Bellamya aeruginosa in Hunan, six populations from urban sections along Xiangjiang River, Lake Dongting Basin were collected for analyzing their bioaccumulation characteristics of six heavy metals (As, Cd, Pb, Cu, Zn and Cr)in foot and visceral masses. The pollution and dietary risk of heavy metals were also assessed using different approaches, including the single factor pollution index method, the weekly/monthly average intakes method and the target hazard quotient (THQ)method, respectively. The results showed that the average bioaccumulation values of As, Cd, Pb, Cu and Zn in the foot were 0.92, 1.65, 0.90, 13.01 and 67.62 mg/kg, respectively, while Cr was not detected. The excesses of As, Cd, Pb and Cu in the foot were 87.06%, 27.06%, 24.72% and 2.35%, respectively. The average bioaccumulation values of As, Cd, Pb, Cu, Zn and Cr in the visceral masses were 9.61, 3.21, 3.75, 33.58, 169.05 and 1.23 mg/kg, respectively. The excesses of As, Cd, Pb, Cu and Cr in the visceral masses were 100%, 71.76%, 65.88%, 14.12% and 75.8%, respectively. The mean and maximum weekly intakes of As, Pb, Cu, and Zn for adult in all analyzed sections were lower than the tentative weekly tolerable intake reference value (PTWI)proposed by the Joint FAO/WHO Joint Committee of Experts on Food Additives (JECFA). However, the average monthly Cd intake of adults along the Zhuzhou sections exceeds the monthly tolerance intake reference value, and the maximum value is 3.44 times of the reference value. The maximum monthly Cd intake of adults in the Yongzhou and Xiangtan sections are 1.16 and 1.68 times of their corresponding reference values, respectively. Except As, the THQ value of Bellamya aeruginosa was far less than 1, but all TTHQ values were equal or greater than 1. Overall, the results indicated that the B. aeruginosa in the six urban sections along Xiangjiang River were under a certain pollution, especially in Hengyang, Xiangtan and Zhuzhou. Furthermore, the amount of heavy metal bioaccumulation in the visceral masses of the B. aeruginosa in each river section was higher than that of the foot. Therefore, there are potential health risks of B. aeruginosa via long-term consumption by residents along the Xiangjiang River.
Key words:  Xiangjiang River  Bellamya aeruginosa  heavy metal pollution  dietary risk assessment
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