2010年-2014年包头市土壤中重金属含量监测结果分析

Analysis of the monitoring results of heavy metal content in soil from Baotou during 2010-2014

目的了解包头市土壤中重金属的含量状况及变化趋势。方法按《内蒙古自治区农村环境卫生监测工作方案》的要求,选取包头市城区、农区、牧区3个地区,采集农田土壤进行重金属铅、镉、铬的监测分析,依据GB/T 17141—1997《土壤质量铅、镉的测定》中的方法检测铅、镉,依据HJ 491—2009《土壤总铬的测定》中的方法检测铬。结果通过5年对具有代表性的3个地区的农田土壤进行检测,铅100%符合国家一级土壤质量标准;镉96%符合国家一级土壤质量标准、4%符合国家二级土壤质量标准;铬24%符合国家一级土壤质量标准、76%符合国家二级土壤质量标准。结论包头市土壤中重金属污染总体水平不算高,但部分金属项目仍存在污染,通过对5年间数据比对,表明土壤质量有逐年下降的趋势,需要引起有关部门的重视,积极采取针对性措施。

Objective To learn the contents and changing tendency of heavy metal in the soil from Baotou. Methods According to the Programs of Monitoring of Hygiene in Inner Mongolia,choosing soil from city,rural area and raising animal area in Baotou for monitoring and analyzing Pb,Cr and Cd. Based on the GB / T 17141—1997 the Determination of Pb and Cr in Soil,to determine Pb and Cr in the soil,and HJ 491—2009 the Determination of Cd in Soil to determine Cd in soil. Results According to the determination of the three soils in the past five years,100% was keeping with the national regulation of the first class soil with Pb,96% was keeping with the national regulation of the first class soil with Cr,4% was keeping with national regulation of the second soil with Cr,24% was keeping with the national regulation of the first class with Cd,76% was keeping with the second class with Cd. Conclusion The pollution of heavy metal in Baotou is still in a low level,but some of the metal are polluting. According to the data comparison of the five years,the quality of soil is reducing and needs the attention of the government to take active measures.