城市土壤污染的磁学监测研究  

Magnetic Techniques Used for Monitoring Urban Soil Pollution

作　　者：李晓庆[1] 胡雪峰[1] 孙为民[2] 张甘霖[1] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [2]上海大学环境科学与工程系,上海200072

出　　处：《土壤》2006年第1期66-74,共9页Soils

基　　金：国家自然科学基金重点项目(40235054);面上项目(40101013);中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室基金项目;上海市高等学校青年科学基金项目联合资助。

摘　　要：对上海市典型工业区（宝山区凇南镇）与农业区（宝山区罗泾镇）土壤磁性特征和重金属含量进行研究，结果表明：工业区土壤磁化率（Xlf）平均为271×10^-8m^3/kg，最高达1660×10^-8m^3/kg，频率磁化率（Xfd）平均〈2％；农业区土壤Xlf平均为32．5×10^-8m^-3/kg，变化范围为；（15～58．6）×10^-8m^3／kg。工业区土壤磁性异常增值，与工业活动与交通运输中含Fe磁性颗粒的排放有关：工业区土壤斯与土壤Cu、Zn、Pb、Cd、Cr、Mn、Fe的含量存在极显著正相关性，表明土壤磁性可作为监测城市／工业土壤污染的有效手段。农业区土壤Xlf接近土壤背景值，与土壤重金属的相关性不显著。Magnetic susceptibility and heavy metal contents of the soils in typical industrial （Songnan Town） and agricultural （Luojing Town） areas in Baoshan District, Shanghai, were analyzed. The results show that the average value of magnetic susceptibility （Xlf） of the industrial soils is 271×10^-8 m^3/kg, with the highest reaching 1660×10^-8 m^3/kg, and the average value of 7sd being less than 2%. The average value of Xlf of the agricultural soils is 32.5×10^-8 m^3/kg, varying in the range of （15-58.6）× 10^-8 m^3/kg. The extreme enhancement of Xlf in the industrial soils is mainly attributed to the accumulation of ferrimagnetic particles emitted from industrial activities and automobiles. The Xlf values in the industrial soils are significantly correlated with contents of Cu, Zn, Pb, Cd, Cr, Mn and Fe, which implies that the magnetic technique can be used for monitoring industrial/urban soil pollution. The Xlf values in the agricultural soils are close to the background value, showing no significant correlation with contents of heavy metals.

关 键 词：城市土壤 磁化率 重金属 

分 类 号：X53[环境科学与工程—环境工程]