贵州省9个小品种蔬菜重金属污染风险评估

Risk Assessment of Heavy Metals Pollution in 9 Small Vegetable Varieties of Guizhou Province

通过采集贵州省各地区9种小品种蔬菜样品,探究小品种蔬菜重金属Pb、Cd、Hg、As的污染状况,以及4种重金属对人体的健康风险。结果表明:贵州省小品种蔬菜的重金属Hg、Pb、Cd、As超标率均低于3%,风险较低;在一定程度上存在综合污染,其中芫荽、茼蒿和细香葱重金属综合污染相对严重,南瓜和丝瓜则受到重金属综合污染的影响比较小;由聚类分析和计算暴露风险指数值可知,细香葱、芫荽、茼蒿相对于其他几种小品种蔬菜风险较高,但平均含量均未超过MRL值,总体风险较小,9种小品种蔬菜的As、Cd、Hg和Pb的HQ蔬菜值〈1,健康风险可以接受。

By collecting 9 kinds of vegetable samples from different regions of Guizhou province, to explore the Pb, Cd, Hg, As pollu- tion of 9 vegetable varieties, analysis health risks of four kinds of heavy metals to human body. The results showed that the heavy metal Hg, Pb, Cd and As of the short species vegetables in Guizhou province were lower than 3%, and the risk was lower; To a certain ex- tent, four kinds of heavy metal pollution cross contamination, the poluttion of Coriandrum sativum L. , Chrysanthemum coronarium L. and Allium schoenoprasum is relatively serious, effect of Cucurbita moschata （ Duch. ex Lam. ） Duch. ex Poiret and Luffa cylindriea （ L. ） Roem. is relatively less contaminated by heavy metals; By clustering analysis and calculated exposure risk index shows, Corian- drum sativum L. , Chrysanthemum coronarium L. and Allium schoenoprasum have greater risk than other vegetables, but the average content did not exceed the MRL value, the overall risk is smaller,the value of, Cd, and HQ of 9 kinds of vegetables,Hg, Pb and As, health risks can be accepted.