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目的了解佛山南海区市售无公害蔬菜中的农药残留与重金属污染情况;对比与本土种植以及市售普通蔬菜在重金属污染和农药残留的情况。方法采集标有无公害蔬菜标识的蔬菜40个样品、本土种植的蔬菜47种241个样品、市售普通蔬菜50个样品,进行5种重金属含量水平和9种有机磷农药残留监测。结果标有无公害蔬菜也存在不同程度的重金属污染,镉超标率20%,最高倍数1.6倍;铅超标率10%,最高倍数1.4倍;本土种植蔬菜以总汞、镉、铅超标为主,总汞超标率为36.9%,最高倍数27倍;镉超标率为24%,最高倍数4.6倍;铅超标率为14.9%,最高倍数5.95倍。市售无公害蔬菜和普通蔬菜样品上述9种有机磷农药残留量监测结果阴性。结论佛山市南海区本土种植蔬菜受总汞污染严重,经食用蔬菜摄入重金属对人们健康风险评估值得进一步探讨。
Objective To understand the pesticide residue and heavy metal pollution in the market of pollution-free vegetables in Nanhai District, Foshan City. Compare with the local planting and the common vegetables in the market in the case of heavy metal pollution and pesticide residues. Methods 40 samples of vegetables marked with pollution-free vegetables, 241 samples of 47 cultivated vegetables, 50 samples of common vegetables were collected, and the levels of 5 heavy metals and 9 residues of organophosphorus pesticides were monitored. Results showed that pollution-free vegetables also had different levels of heavy metal pollution, with the exceeding standard of 20% and the highest multiple of 1.6 times; the over-standard of lead of 10% and the highest of 1.4 times; native vegetables grown with total mercury, cadmium and lead exceeded the standard, Total mercury exceeded the standard rate of 36.9%, the highest multiple of 27 times; cadmium exceeded rate of 24%, the highest multiple 4.6 times; lead exceeded 14.9%, the highest multiple of 5.95 times. Commercial pollution-free vegetables and vegetables samples The above nine organophosphorus pesticide residues were negative. Conclusion The native vegetables grown in Nanhai District of Foshan City were seriously polluted by total mercury, and the assessment of human health risks through the intake of heavy metals by food vegetables deserved further exploration.