鲁甸县农村旱地土壤中铅、镉及蛔虫卵污染调查与监测

Survey and monitoring of lead and cadmium and ascaris eggs of dry land in Ludian county

目的通过对鲁甸县农村旱地土壤中重金属铅、镉及蛔虫卵的污染调查与监测,为客观评价农村环境卫生状况提供科学依据和技术支持。方法对鲁甸县的11个乡镇52个行政村的农村旱地土壤进行现场调查和采样分析。结果以国家《土壤环境质量标准》（GB 15618-1995）二级标准作为评价标准,龙头山镇和乐红镇各有一个土样中铅含量超过国家标准限值,分别达标准限值的1.44倍和1.15倍,其余土样均在国家二级标准限值内;11个乡镇49个土样中镉含量超过国家标准限值,达标准限值5.1倍~9.63倍的有7个,为重度污染。结论鲁甸县农村旱地97%土壤中铅含量没有超过国家二级标准,但43.33%的土样超过云南省的背景值;81.67%土样中镉含量超过国家二级标准,90%的土样超过云南省的背景值,100%旱地土壤中没有检出活的蛔虫卵。

Objective By the survey and monitoring of pollution of heavy metal lead cadmium and ascaris eggsof dry land in Ludian county, providing scientific basis and technological support for jictively evaluating the obenvironmental and health conditions in rural areas. Methods Do soil sampling and analysis of field survey to the dry land of 52 administrative villages in 11 villages of Ludian county. Results With the national ＂soil environmental quality standard＂ （GB 15618 -1995） second stand- ard as the evaluation criteria, the Longtoushan town and the Lehong town have a soil sample than the national standard limit re- speetively, up to the standard limit value with 1.44 times and 1.15 times. And the rest of the soil samples are lower than the second national standard limit internal; cadmium content exceeded the national standard limit for 49 soil samples of 11 towns. There are 7 samples＇ cadmium content up to the standard limit value of 5.1 times -9.63 times, which are severe pollution. Conclusion Though the lead content of 97% rural dry land in Ludian county haven＇t exceeded the second national standards, but 43.33% of the soil samples in Yunnan province are more than the background value; cadmium content of 81.67% soil sampies are more than the second national standards, 90% soil samples in Yunnan province are more than the background value. Ascaris eggs haven＇t been checked out in dry land.