2017年-2019年霸州市农村土壤重金属检测结果分析

Detection results and analysis of heavy metal in rural soil in Bazhou City from 2017 to 2019

目的了解河北省霸州市农村土壤中重金属污染情况及变化趋势,为治理污染提供科学依据。方法按照河北省农村环境卫生监测项目技术方案要求,依据《土壤质量铅、镉的测定石墨炉原子吸收分光光度法》(GB/T 17141—1997)和《土壤总铬的测定火焰原子吸收分光光度法》(HJ 491—2009),2017年-2019年对霸州市5个乡镇20个行政村的60份农田土壤进行检测,并依据《土壤环境质量标准》(GB 15618—1995)进行评价。结果2017年-2019年霸州市农村土壤中铅检测结果平均值为18.1 mg/kg、19.0 mg/kg和36.5 mg/kg,镉检测结果平均值为0.065 mg/kg、0.111 mg/kg和0.185 mg/kg,铬检测结果平均值为41.6 mg/kg、49.9 mg/kg和73.7 mg/kg,2019年与2017年和2018年铅、镉、铬检测结果差异有统计学意义(P<0.01)。结论霸州市农村土壤均符合二级标准,但土壤中重金属有加重的趋势,相关部门应加强土壤污染监测和综合治理。

Objective To understand the situation and trend of heavy metal pollution in rural soil of Bazhou City,Hebei Province,so as to provide scientific basis for pollution control.Methods In accordance with the requirements of technical scheme for rural environmental health monitoring project in Hebei Province,based on the Soil Quality of Lead,Cadmium Determination of Graphite Furnace Atomic Absorption Spectrophotometric Method(GB/T 17141-1997)and the Soil,Determination of Total Chromium,Flame Atomic Absorption Spectrophotometry(HJ 491-2009).The soil samples from 60 farmland in 20 administrative villages in 5 townships of Bazhou City were tested and evaluated according to the Standard of Soil Environmental Quality(GB 15618-1995)2017-2019.Results From 2017 to 2019,the average results of lead detection in rural soil of Bazhou City were 18.1 mg/kg,19.0 mg/kg and 36.5 mg/kg,the mean of cadmium detection was 0.065 mg/kg,0.111 mg/kg and 0.185 mg/kg,the mean of chromium detection was 41.6 mg/kg,49.9 mg/kg and 73.7 mg/kg,and the differences between 2019 and 2017,2018 was statistically significant(P<0.01).Conclusion The soil in rural area of Bazhou City conforms to the secondary standard,but the heavy metals in the soil tend to increase,so it is necessary to strengthen soil pollution monitoring and comprehensive treatment.