湖南湘东矿区镉污染状况调查

Investigation of Cadmium Pollution in Irion Miner Region of Eastern Hunan

[目的]了解湘东矿区镉污染状况。[方法]调查湖南湘东地区2县10个乡镇3类地块的镉污染状况。[结果]湘东地区含有较高浓度的镉,其含量相对国家标准均已达到严重污染程度。煤铁矿是主要的镉污染源,且铁矿区的镉含量高于煤矿区。土壤p H和电导率是导致镉生物有效性差异的重要因素,其中,煤矿开采带来有效态镉污染的风险更大。该地区以籼稻为主,容易积累镉。[结论]湘东地区土壤的镉污染可能会威胁当地食品安全,应加强重视。

[ Objective ] To understand the status quo of cadmium pollution in mining area of eastern Hunan. [ Method J Situation of cadmium pollution of eastern Hunan in 2 counties 10 towns 3 block was investigated. [ Result] The results showed that eastern Hunan contain higher concentrations of cadmium,the content of relative national standards had reached the severity of pollution. Coal mine and iron ore were the main sources of cadmium pollution, and the cadmium content of soil in iron ore area was higher than that in coal mine area. Soil pH and conductivity were the important factors that lead to the bioavailability of cadmium, among which the risk of cadmium pollution was more serious. Eastern Hunan was dominated by indica rice ,which was easy to accumulate cadmium. [ Conclusion] Cadmium pollution in eastern Hunan soil may threaten local food safety,should pay more attention.