合肥市大兴镇水稻重金属累积与健康风险分析

Accumulation of heavy metals and related health risks from rice grains in Daxing Town,Hefei City

通过对合肥市周边中心城镇大兴镇的标准农田中水稻稻粒的重金属质量比等调查研究发现,稻粒中的Ni、Cd、Hg超标率分别为70%、16.67%、6.67%,Cu虽然没有发现超标现象,但也有部分样品接近国家农业行业标准(NY 861-2004)。从重金属污染风险的角度来看,需要优先控制重金属Cd和Hg。

A field experiment was conducted in the standard farmland around Taxing Town in Hefei to investigate the effects of heavy metal concentration in rice grains. Thirty samples of rice grains were collected, and the concentration of As, Cd, Hg, Pb, Cu, Zn, Cr and Ni were measured. The concentrations of Ni, Cd and Hg in rice grains were 70%, 16. 67% and 6.67% higher, respectively, than the China National Extractive Industry Standard for Food. The concentration of Cu in some samples were near, although still lower than, the China National Extractive Industry Standard for Food. Cd and Hg should be frequently monitored and closely controlled as the priorities in consideration of human health risks associated with consumption of the grain of rice grown in Daxing area.