云贵川主产区核桃中重金属污染水平及其风险评估

发布时间：2018-07-07 20:13

本文选题：核桃 + 重金属　；参考：《林业科学》2017年11期

【摘要】：【目的】研究云南、贵州和四川主产区核桃的重金属污染状况,评价食用核桃摄入重金属的人体健康风险,为云贵川核桃绿色食品生产和健康消费提供科学依据。【方法】在云贵川核桃主产区采集204批次核桃样品,采用石墨炉原子吸收光谱法(GF-AAS)和原子荧光光谱法(AFS)对样品中Pb、Cd和As进行测定,应用单因子污染指数法和内梅罗综合污染指数法进行核桃重金属污染水平评价,并结合中国居民核桃的消费量和体质量信息,采用美国环保局(USEPA)的健康风险模型对核桃中As、Pb和Cd的膳食风险和致癌风险进行评估。【结果】云贵川核桃样品中重金属As、Pb和Cd的检出范围分别为ND~0.064 mg·kg-1,ND~0.095 mg·kg-1,ND~0.017 mg·kg-1,3种重金属的平均含量均低于标准LY/T1777—2008《森林食品质量安全通则》的限量值(ML,0.2、0.2、0.1 mg·kg-1),说明3个省份核桃中As、Pb和Cd的污染状况总体较轻。研究区域核桃样品中重金属的单因子污染指数总体PbAsCd,而云南省核桃样品中As的单因子污染指数最高,四川省Pb的单因子污染指数最高,分别达到0.15和0.17。内梅罗综合污染指数表明,3个省份核桃样品重金属污染排序为四川省云南省贵州省,但其综合污染指数都小于0.15,远小于警戒值1。【结论】云贵川主产区核桃样品中Pb和As是主要的重金属污染物,对人体健康的风险PbAsCd;儿童因摄食核桃导致的重金属潜在健康风险约是成人健康风险的25倍;但无论儿童还是成人,重金属的膳食风险和致癌风险值均低于风险阈值,风险尚在可接受水平内。
[Abstract]:[objective] to study the heavy metal pollution of walnut in Yunnan, Guizhou and Sichuan provinces, and to evaluate the risk of heavy metal intake in edible walnut. To provide scientific basis for green food production and healthy consumption of walnut in Yungui Sichuan. [methods] 204 batches of walnut samples were collected from the main producing areas of walnut in Yungui Sichuan. Graphite furnace atomic absorption spectrometry (GF-AAS) and atomic fluorescence spectrometry (AFS) were used to determine Pb, CD and as in the samples. The pollution level of heavy metals in walnut was evaluated by single factor pollution index method and Nemero comprehensive pollution index method. And combined with the consumption and body mass information of walnut in China, The health risk model of USEPA was used to evaluate the dietary risk and carcinogenic risk of aspartate Pb and CD in walnut. [results] the detection range of heavy metal As-Pb and CD in walnut samples from Yungui Sichuan was 0.064 mg / kg ~ (-1) NDN 0.095 mg / kg ~ (-1) and 0.017 mg / kg ~ (-1) heavy gold, respectively. The average contents of the genus were lower than the limit value of the standard LY / T1777-2008 General rules for quality and Safety of Forest Food (MLT 0.2N 0.2mg kg-1), which indicated that the pollution status of As-Pb and CD in walnut was relatively light in three provinces. The single factor pollution index of heavy metals in walnut samples was the highest in Yunnan province and 0.15 and 0.17 in Sichuan province, respectively. The comprehensive pollution index of Nemero shows that the heavy metal pollution order of walnut samples in three provinces is Sichuan Province, Yunnan Province, Guizhou Province, Guizhou Province. But the comprehensive pollution index is less than 0.15, which is far less than the warning value. [conclusion] Pb and as are the main heavy metal pollutants in walnut samples from the main producing areas of Yungui Sichuan. The potential health risk of heavy metals caused by eating walnut in children is about 25 times higher than that in adults, but the dietary risk and carcinogenic risk of heavy metals in both children and adults are lower than the risk threshold. The risk is still within acceptable levels.
【作者单位】：中国林业科学研究院亚热带林业研究所;
【基金】：中国林业科学研究院基本科研业务费专项(CAFYBB2017QC002) 国家林业公益性行业科研专项(201304705)
【分类号】：S664.1;X56;X820.4

【相似文献】