Distribution and Speciation Analysis of Heavy Metal Elements in Urumqi Urban Soils
A selective sequential extraction method developed by Tessier et al was used to study the speciation of heavy metal elements, Cr, Cu, Zn, and Pb, in soils taken from six different functional areas in Urumqi.The results showed that the contents of Pb, Zn, Cr, and Cu were significantly above their average background values, as high as 3.6 times, 2.3 times, 2.1 times, and 1.9 times, respectively.In urban soils, Pb existed mainly as residual fraction and Fe-Mn oxides, accounted for 45.4％ and 38.9％ totally.Cr and Zn elements were mostly in residual fraction as 94.9％ and 52.7％, respectively.In the soil of Industrial Area, Cu element dominated as organic form of 58.2％ among the four elements.In other functional areas, Cu contents reached the highest proportion of 71.7％～78.7％ in residual fraction.The activity of the heavy metal elements in soil was assessed by the activation of the elements.The activation sequence was obtained as Pb > Zn > Cu > Cr.It indicates that the Pb and Zn contents in Urumqi urban soils have potential ecological risks, and should be in strict control
heavy metal speciation activity urban soil Urumqi
QIAN Yi WANG Ya-yu ZHU Jian-wen YANG Li-jie
School of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao,P. Light Chemistry Engineering Departments Xinjiang institute of light industry technology Urumqi,P.R.C College of Grassland and Environmental Science Xinjiang Agricultural University Urumqi,P.R.China 830
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）