[Heavy metal content and ecological risk warning assessment of vegetable soils in Chongming Island, Shanghai City].
In order to determine the content of copper (Cu), lead (Pb), chromium (Cr), zinc (Zn) and cadmium (Cd) in vegetable field, soil samples were collected from three towns of Chongming Island, an important ecotypic island of Shanghai City. The average content of Cu, Zn, Pb, Cr and Cd in vegetable soil of the three towns is 29.2 mg x kg(-1), 91.2 mg x kg(-1), 26.5 mg x kg(-1), 79.4 mg x kg(-1) and 0.222 mg x kg(-1), respectively. Except for the content of Cd exceeded the first grade of national soil standard (GB 15618-1995), the contents of the other four heavy metals were less than the first grade of the standard, and the content of heavy metals in this fireld met the request of heavy metal level to produce green foods (NY/T 391-2000). The contents of Cu, Pb, Cr, Zn and Cd in the vegetable soils are 24.3%, 24.4%, 22.9%, 18.8% and 65.7% higher than the background value of Shanghai, respectively. The result of ecological risk warning assessment showed that three sampling sites were medium warning situation, ten were light warning situation, eight were warning situation and one was no warning, in all the 23 sampling sites. The total situation of Chongming Island was light warning, and the I(ER) = 1.562. The order of ecological risk was Baozhen town (I(ER) = 1.799) > Chengqiaozhen town (I(ER) = 1.636) > Chenjiazhen (I(ER) = 1.368). The three towns were all light warning situation.
Wang
Jun
J
Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environment Science, East China Normal University, Shanghai 200062, China. jwang@geo.ecnu.edu.cn
Chen
Zhen-Lou
ZL
Wang
Chu
C
Ye
Ming-Wu
MW
Shen
Jing
J
Nie
Zhi-Ling
ZL
D002681:China; D002857:Chromium / Q000032:analysis; D003300:Copper / Q000032:analysis; D017753:Ecosystem; D005506:Food Contamination / Q000032:analysis*; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis*; D014675:Vegetables / Q000737:chemistry* / Q000254:growth & development
D019216:Metals, Heavy; D012989:Soil Pollutants; D002857:Chromium; D007854:Lead; D003300:Copper