Wang Jun, Chen Zhen-Lou, Wang Chu, Ye Ming-Wu, Shen Jing, Nie Zhi-Ling
Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environment Science, East China Normal University, Shanghai 200062, China.
Huan Jing Ke Xue. 2007 Mar;28(3):647-53.
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.
为了测定菜地中铜（Cu）、铅（Pb）、铬（Cr）、锌（Zn）和镉（Cd）的含量，从上海市重要生态型岛屿崇明岛的三个镇采集了土壤样本。这三个镇菜地土壤中Cu、Zn、Pb、Cr和Cd的平均含量分别为29.2 mg·kg⁻¹、91.2 mg·kg⁻¹、26.5 mg·kg⁻¹、79.4 mg·kg⁻¹和0.222 mg·kg⁻¹。除Cd含量超过国家土壤一级标准（GB 15618 - 1995）外，其他四种重金属含量均低于该标准一级，且该地块重金属含量符合生产绿色食品的重金属水平要求（NY/T 391 - 2000）。菜地土壤中Cu、Pb、Cr、Zn和Cd的含量分别比上海背景值高24.3%、24.4%、22.9%、18.8%和65.7%。生态风险预警评估结果显示，在全部23个采样点中，3个采样点为中警状态，10个为轻警状态，8个为警情状态，1个无警情。崇明岛总体处于轻警状态，I(ER)=1.562。生态风险排序为：堡镇（I(ER)=1.799）＞城桥镇（I(ER)=1.636）＞陈家镇（I(ER)=1.368）。三个镇均处于轻警状态。
