临澧县垃圾填埋场投产前后周围水稻中铅镉含量比对监测

Comparison of the levels of lead and cadmium in rice nearby landfill before and after operation in Linli county

目的比对临澧垃圾填埋场投产前后周围水稻中铅镉含量差异,了解其对当地农业环境及居民健康影响。方法分别采集2011年投产前和2012年投产后该垃圾填埋场周围17户农民自产大米,用石墨炉原子吸收法检测其铅镉含量。结果 2011年产大米中铅含量平均值为0.021 mg/kg,镉含量平均值为0.189 mg/kg,2012年产大米铅含量平均值为0.043 mg/kg,镉含量平均值为0.180 mg/kg。结论该垃圾填埋场目前尚未显示对周围水稻有严重铅镉污染,但水稻中铅含量有增高趋势,应持续加强监测,以保障人群健康。

Objective To compare the levels of lead and cadmium in rice nearby landfill before and after operation in Linli county, and investigate the effect of landfill on local agricultural environment and health. Methods The self - produced rice samples were collected form 17 farmers nearby landfill in 2011 （before landfill operation） and 2012 （after landfill operation） to detect the levels of lead and cadmium by graphite furnace atomic absorption spectrometry. Results In 2011 before landfill operation, the average contents of lead and cadmium in rice were 0. 021 mg/kg and 0. 189 mg/kg, while in 2012 after landfill operation, they were 0.043 mg/kg and 0. 180 mg/kg. Conclusion At present, the landfill had no severe pollution of lead and cadmium in rice, but the lead content in rice had a tendency to increase, so reinforcing the surveillance of rice to protect crowd health should not be neglected.