摘要
选取成都经济区内成都、德阳、蒲江彭山3类典型城市作为研究对象,对其城郊土壤中Cd,Hg,As,Zn,Cr,Cu,Pb 7种重金属元素含量作了对比研究。与国家土壤二级质量标准比较,成都、德阳、彭山蒲江Cd含量均超标,超标率分别为11.67%,70.67%,39.00%,彭山蒲江Cr含量超标,超标率为20.25%,其它元素含量均未超标。比较3类不同城市城郊土壤重金属含量,成都城郊Hg,As,Zn,Pb含量最高,Cd,Cr含量相对最低;德阳Cd,Cu最高;蒲江和彭山Cr相对最高,Hg,As,Zn,Cu,Pb含量则相对最低。与国内其他城市比较,成都、德阳城郊土壤Hg含量,彭山蒲江、德阳Cr含量在全国处于较高水平;成都的As,Cd含量,德阳的Cd,Zn含量,蒲江彭山的Hg,As,Zn,Pb含量处于全国较低水平。
Choosing the three types of typical cities （Chengdu, Deyang, Pengshan-Pujiang） of Chengdu economic area as research objects, this paper did a comparative study on concentrations of seven heavy metals including Cd, Hg, As, Zn, Cr, Cu, Pb in suburb soil of these areas. Compared with the national grade Ⅱ quality standard of soil, the Cd contents in soils of Chengdu,Deyang, Pengshan-Pujiang exceed the standard, and the exceeding rate are 11.67 %, 70.67 %, 39.00 % respectively; the Cr concentrations in soil of Pengshan-Pujiang exceed the standard, and the exceeding rate are 20.25%;however the contents of other heavy metals not exceed the standard. The comparison of heavy metal concentrations in soils between the three different cities showed that the concentrations of Hg, As, Zn,Pb in Chengdu suburb soil get to the highest,and the concentrations of Cd,Cr are relatively the lowest;the concentrations of Cd,Cu in Deyang suburb soils are the highest;the concentration of Cr in Pengshan- Pujiang suburb soils is relatively the highest,and the concentrations of Hg, As, Zn, Cu, Pb are relatively the lowest. Compared with the other cities in China,the concentrations of Hg in Chengdu and Deyang suburb soil,and the concentrations of Cr in Pujiang-Pengshan are higher than that of other cities, the concentrations of As, Cd in Chengdu, the concentrations of Cd ,Zn in Deyang,and the concentrations of Hg,As,Zn,Pb in Pengshan-Pujiang are lower than that of other cities.
出处
《水土保持研究》
CSCD
北大核心
2008年第2期266-269,共4页
Research of Soil and Water Conservation
基金
中国地质调查局资助项目(200314200015)
高等学校博士学科点专项科研基金(20060616020)
关键词
重金属
城市生态地球化学
城郊土壤
heavy metals
city ecological geochemistry
city suburb soils
