污染谷物中重金属的分布及加工过程的影响

Distribution of Heavy Metals in Polluted Crops Seeds and the Effect of Heavy Metals in the Food Processing

对污染水稻、小麦和玉米籽实中 Cd、Pb、Cu的分布及加工过程的去除进行了研究 .结果表明 ,Cd、Pb、Cu在水稻、小麦和玉米籽实各形态结构中的浓度分布不均 ,胚中浓度显著高于胚乳 ,且皮层和颖壳中浓度也较高 .但从单位重量籽实中的 Cd、Pb、Cu总量分布看 ,胚乳中占据绝对优势 .稻、麦籽实中 3种元素的浓度随样品加工浓度的升级去除率增加 ,水稻中 Cd、Pb、Cu的去除率可达 2 4 .1 0 %、56.93%和 41 .0 0 % ,小麦分别为 61 .66%、81 .2 7%、78.37% .

In this paper,the distribution of cadmium,lead and copper in polluted seeds of rice,wheat and corn,and the removal of heavy metals in processing were discussed.The results showed that the concentrations of Cd,Pb and Cu in different parts of seeds were varies.The concentrations of Cd,Pb and Cu in embryo were higher than that in endosperm.The accumulating contents of Cd,Pb and Cu in endosperm were predominant.The removal ratio of Cd,Pb and Cu in rice was 24 1%,56 9% and 41.0%,respectively,and that in wheat was 61 7%,81 3% and 78 4%,respectively.