贵溪冶炼厂周边农田土壤重金属污染特性及评价

在对贵溪冶炼厂周边区域的农田土壤及生产的稻谷进行采样调查和数据处理分析的基础上,对农田土壤重金属污染特性和现状进行了监测和初步评价,结果表明:农田土壤重金属污染可能来源于贵溪冶炼厂废水的排放及尾矿渣的堆放,与灌溉水源无关;用国家土壤环境质量二级标准进行评价可知,农田土壤重金属的综合污染指数较高,土壤污染已处于重度污染等级,单项重金属污染指数表明Cu、Cd的含量已严重超标,并处于重度污染等级,Zn、Pb和As的含量未构成污染;水泉村、竹山村与所生产的稻谷三者之间呈显著或极显著正相关,即农田生态系统呈复合污染的趋势。

Assessment on the Characteristic of Heavy Metals Contaminated Farmland Soil Around Guixi Smeltery Jiangxi Province

Characteristic and current situation of heavy metals pollution of soils and grains around Guixi smeltery were monitored and analyzed.The results indicated that the heavy metals in the contaminated farmland mainly originated from brooking refinery waste water and discharging tail gangue,but not from the irrigation water source;According to the second standards levels of the national soil environment quality,the farmland contamination indexes heavy metals was high,being in the specific heavy contamination range.Single-gene contaminated comprehensive indexes indicated that Cu,and Cd contents seriously exceeded the allowed value,and at the same time,they were in the specific heavy contamination range,while Zn,Pb and As content did not exeed the allowed value.There was compound pollution tendency on the farmland ecosystem.