文章摘要
珠江河网淡水鱼,虾和河蚬重金属污染特性及安全性评价
Pollution characteristics and safety assessment of heavy metals in natural fish, shrimp and shellfish from Pearl River waterway
投稿时间:2019-04-12  修订日期:2019-04-29
DOI:
中文关键词: 珠江河网  水产品  重金属  健康风险评价
英文关键词: freshwater fish  Pearl River Delta  health risk assessment
基金项目:
作者单位E-mail
谢文平 中国水产科学研究院珠江水产研究所 xwp7118@163.com 
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中文摘要:
      为了全面评价珠江河网水产品重金属残留,生态及食用安全风险,对鱼,虾和河蚬重金属的含量进行了检测分析,同时采用单因子污染指数(Pi)、综合污染指数(MPI)和多种健康风险评价模型对其污染程度、食用致癌和非致癌风险进行了评价。结果表明,水产品中重金属的含量范围和均值分别为Cr (0.031~0.223, 0.161 ), Ni (0.070~0.836, 0.278 ), Cu (0.199~27.208,7.668), Zn (3.422~49.456,13.447), As (0.112~4.192,0.637), Cd (0.004~3.605,0.312), Hg (0.002~0.046, 0.022 ) ,Pb (0.025~0.230,0.113) (mg/kg,湿重)。
英文摘要:
      In order to comprehensively evaluate residual, ecological and edible health risks of natural aquatic products caused by heavy metal in the Pearl River waterway,the concentrations of heavy metals in fish, shrimp and shellfish were determined. The pollution degree, carcinogenic and non-carcinogenic risksof aquatic products were evaluated by single factor pollution index (Pi), comprehensive pollution index (MPI) and various health risk assessment models, respectively. The results showed that the content range and mean of Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Hg and Pb in aquatic products are Cr (0.031-0.223, 0.161 ), Ni (0.070-0.836, 0.278 ), Cu (0.199-27.208,7.668), Zn (3.422-49.456,13.447), As (0.112-4.192,0.637), Cd (0.004-3.605,0.312), Hg (0.002-0.046, 0.022 ) ,Pb (0.025-0.230,0.113) (mg/kg,wet weight) , respectively. Compared with different aquatic products, the metal residues in fish and shrimp samples were within the quality safety value, but the As and Cd residues of shellfish slightly exceeded the standard value. The decreasing orders of single factor pollution index of heavy metal pollution degree of aquatic products was Cd>As>Pb>Hg>Cr >Zn >Cu>Zn. MPI values showed that the pollution degree of different aquatic products was shellfish (1.038) > shrimp (0.353) > fish (0.101-0.292). The heavy metal residues in different fishes are mainly related to their different feeding habits, living environment and accumulation ability to specific heavy metals. In health risk assessment, the order of TTHQ of aquatic products is as follows: Shellfish>Shrimps>Eleotridae>Catfish>Crucian>Culter alburnus>Perch>Mrigal carp>Carp>Tilapi>Silver carp>Dace>Grass carp>Barbel Chub>Bighead fish. The total TTHQ of complex heavy metals is more than 1, the contribution rate of As was the highest, with an average contribution rate of 51.7%. There is a certain risk of carcinogenesis in edible shellfish..
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