农安县耕地土壤重金属污染评价

The evaluation of heavy metal pollution in farmland soils,Nong'an County

以吉林省长春地区的农安县为研究区域,采用单项污染指数法、单因子和多因子综合污染指数法及SPSS技术,全面评价了县域内耕地土壤重金属的污染状况.结果显示,农安县土壤环境质量总体良好.Pb、As、Cd、Cr的单项污染指数、单因子指数和多因子综合指数均达到NY/P391-2000标准.Hg单项污染指数有107个样点符合NY/P391-2000标准,157个符合GB/T18407-2001标准,5个不合格;Hg多因子综合污染指数有103个样点符合NY/P391-2000标准的安全、清洁水平,157个样点符合GB/T18407-2001标准的安全、清洁水平,5个样点处于警戒级、尚清洁水平;Hg单因子污染指数有7个乡镇达到NY/P391-2000标准,15个乡镇仅达到GB/T18407-2001标准.

Taking farmland soils in Nong＇an County as study area,this paper evaluated roundly the heavy metal contamination in farmland soils adopting single pollution indexes, single-factor composite indexes,multi-factor integrated indexes and SPSS technology. The conclusions showed that the quality of the most soil environment was good in Nong＇an County. The single pollution indexes,single-factor composite indexes and multi-factor integrated indexes of Pb, As, Cd, Cr all reached NY/P391-2000 standard. As for Hg,the single index was that 107 samples met NY/P391-2000 standard, 157 samples met GB/T18407 2001 standard and 5 samples failed; the multi-factor integrated index was that 103 samples met NY/P391-2000,in the safe and clean level, 157 samples met GB/T18407-2001 ,in the safe and clean level,and 5 samples failed,in the alert level but still clean the single-factor composite index was that 7 townships met NY/P391 2000 standard and 15 townships only met GB/T18407-2001 standard.