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目的:监测广西主要农产品铅、镉、砷、汞污染状况,探讨污染来源,提出相应的预防和控制措施,同时为政府决策提供科学依据。方法:于2002~2004年在严格的质量控制下,按照统一的方法,选择广西5个市(南宁、桂林、百色、玉林、北海)的主要农产品为监测点,于每年秋冬两季采样,共采样品8大类846件农产品,进行了重金属铅、镉、砷、汞4个指标的监测。结果:共获得1460个有效数据。其中:29件蔬菜、2件鸭肝、5件黄豆、7件皮蛋、3件鲜奶铅含量超标;4件大米、27件蔬菜、18件肾、10件蟹、18件螺、1件花生、1件黄豆镉含量超标,其余农产品中铅、镉、砷、汞含量均低于国家标准。结论:农产品中受到砷、汞重金属污染风险较少,有部分农产品受到不同程度铅、镉重金属污染,尤其是皮蛋中的铅污染和猪肾、甲壳类海产品中的镉污染严重,污染主要来源与工业“三废”排放、污泥、城市垃圾和食品加工中的二次污染有关。应加强对环境的综合治理。
Objective: To monitor the pollution status of lead, cadmium, arsenic and mercury in Guangxi’s main agricultural products, explore the sources of pollution, put forward the corresponding prevention and control measures, and provide the scientific basis for government decision-making. Methods: From 2002 to 2004, under the strict quality control, we selected the main agricultural products of five cities (Nanning, Guilin, Baise, Yulin and Beihai) of Guangxi as the monitoring points according to a unified method and sampled them every year in autumn, Samples of 8 major categories of 846 agricultural products, conducted a heavy metal lead, cadmium, arsenic, mercury four indicators of monitoring. Result: A total of 1460 valid data were obtained. Of which: 29 vegetables, 2 duck liver, 5 soybeans, 7 preserved eggs, 3 fresh milk lead content exceeded; 4 rice, 27 vegetables, 18 kidney, 10 crabs, 18 snails, a peanut , 1 case of cadmium content exceeded, the remaining agricultural products lead, cadmium, arsenic, mercury content is lower than the national standard. Conclusion: There is less risk of arsenic and mercury heavy metal contamination in agricultural products, and some agricultural products are polluted by lead and cadmium to some extent, especially lead contamination in preserved eggs and cadmium in porcine kidney and crustacean seafood, and the main sources of pollution And industrial “three wastes” emissions, sludge, urban garbage and food processing in the secondary pollution. Should strengthen the comprehensive management of the environment.