浙江省7个地区冬笋中铅、镉、铬、砷、汞的 含量及风险评价

Content of Pb, Cd, Cr, As, Hg and risk assessment in winter bamboo shoots in 7 areas of Zhejiang province

中文关键词:  冬笋  铅  镉  铬  砷  汞  风险评价

英文关键词:winter bamboo shoots  Pb  Cd  Cr  As  Hg  risk assessment

中文摘要:

      目的 评价浙江省7个地区冬笋中Pb、Cd、Cr、As、Hg 5种重金属的污染程度。方法 采用石墨炉原子吸收光谱法和原子荧光光谱法测定84个冬笋样品中Pb、Cd、Cr、As、Hg 5种重金属的含量, 并与国家标准中的限量值进行比较, 通过计算单因子污染指数和尼梅罗综合污染指数评价冬笋的污染状况。结果 所测定的84个冬笋样品中, Pb、Cd、Cr、As、Hg的单因子污染指数平均值分别为0.96、0.59、0.10、0.01、0.03; 尼梅罗综合污染指数评价分析的结果表明, 67份样品处于未污染状态, 占总样本的79.8%; 8份样品处于警戒范围内, 占总样本的9.5%; 8份样品处于轻污染状态, 占总样本的9.5%; 1份样品受到中度污染, 占总样本的0.2%。结论 浙江省所采样地区的冬笋样品中的重金属污染风险主要来自Pb, 其次是Cd, Cr、As和Hg的污染风险最低。

英文摘要:

      Objective To evaluate the heavy metal pollution level of Pb, Cd, Cr, As and Hg in winter bamboo shoots in 7 areas of Zhejiang province. Methods The content of Pb, Cd, Cr, As and Hg in bamboo shoots was detected by graphite furnace atomic absorption spectrometry and atomic fluorescence spectrometry, and the data was compared with the food contaminants in national standards. The contamination status in winter bamboo shoots was evaluated by the single factor pollution index and the Nemerow comprehensive pollution index. Results The average values of single factor pollution index of Pb, Cd, Cr, As and Hg in 84 winter bamboo shoots were 0.96, 0.59, 0.10, 0.01 and 0.03, respectively. The analysis result of Nemerow comprehensive pollution index showed that 67 samples were safe and clean, which accounted for 79.8% in the total samples; 8 samples (9.5%) were in the warning area, 8 samples(9.5%) were in the low-grade pollution level, and only one sample (0.2%) was polluted in middle degree. Conclusion The pollution risk of heavy metal in bamboo shoots in sampling areas from Zhejiang province is mainly caused by Pb, followed by Cd, and the pollution risks of Cr, As, and Hg are the lowest.