2011—2012年攀枝花市仁和区农田土壤中铅镉监测结果

Monitoring results of lead and cadmium in soil of the rural field of Renhe District of Panzhihua City from 2011-2012

目的了解攀枝花市仁和区农田土壤中铅、镉污染现状,并为治理污染提供科学依据。方法按照"四川省农村环境卫生监测项目技术方案"的要求,2011—2012年共对辖区内10个乡镇40个行政村的40份农田土壤进行了检测,并依据《土壤环境质量标准》(GB 15618-1995)进行评价。结果铅含量均合格。2011年20份土壤中镉含量均超标,平均值为4.12 mg/kg,最高超标7.7倍;2012年仅有1份土壤超标,10份超过自然背景值,9份比自然背景值低。结论该区农田土壤中镉污染范围较宽、程度重,矿产资源开发可能是导致污染的关键因素,应加强监测与综合治理,尽快消除危害。

[ Objective] To understand the pollution situation of lead and cadmium in farmland soil, and provide scientific basis for pollution control. [Methods ] According to the requirements of ＂ The technical plan of rural environmental health monitoring projeet in Sichuan Province ＂. There were 40 field soil samples were detected within the jurisdiction of 40 administrative villages in 10 townships during 2011-2012. The evaluation basis was ＂ Environmental quality standard for soil＂ （ GB 15618-1995 ）. [ Results ] Lead content of the all soil samples were qualified. The cadmium content in 20 samples of soil were all over the standard and the average value was 4.12 mg/kg in 2011. The highest exceeded the standard 7.7 times. In 2012 only 1 soil sample exceeded the standard, 10 exceeded the natural background, 9 were lower than the natural background. [ Conclusion] The pollution range of cadmium in farmland soil is wide and severe in Renhe District. The exploitation of mineral resources may be the key factors leading to pollution. Strengthening the monitoring and comprehensive management should be done to eliminate the hazards of cadmium pollution as soon as possible.