论文部分内容阅读
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 To investigate and monitor the pollution of lead, cadmium and roundworm eggs in the dry land in the rural area of Ludian County, and provide scientific basis and technical support for the objective evaluation of rural environmental health. Methods Field investigation and sampling analysis were conducted on the dry farmland in 52 administrative villages in 11 villages and towns in Ludian County. Results According to the national secondary standard of Soil Environmental Quality Standard (GB 15618-1995), the lead content of one soil sample in each of Longtoushan Town and Lehong Town exceeded the national standard limits of 1.44 Times and 1.15 times the rest of the soil samples are within the national secondary standard limits; 11 townships 49 soil samples cadmium content exceeds the national standard limit of up to 5.1 times the standard limit of 9.63 times the 7, for the heavy Pollution. Conclusion The lead content in 97% of the soil in Ludian rural dry land does not exceed the national second-class standard, but 43.33% of the soil samples exceed the background value of Yunnan Province. The content of cadmium in 81.67% of the soil samples exceeds the national second-class standard, and 90% Exceeding the background value of Yunnan Province, no live Ascaris eggs were detected in 100% of the upland soil.