Chen Jia-Lin, Li Ren-Ying, Xie Xiao-Jin, Wang Hong, Xu Jing, Shao Jing, Jian Jing, Wuerman Akejuli, Shen Jia, Yang Zong
Department of Agricultural Resources and Environment, College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Nanjing Academy of Landscape and Forestry, Nanjing 210037, China.
Huan Jing Ke Xue. 2021 Feb 8;42(2):909-916. doi: 10.13227/j.hjkx.202005203.
Concentrations and the spatial distribution of heavy metals (Cr, Cu, Zn, Pb, and Cd) in greenbelt soils in the main areas of Nanjing City, Jiangsu Province, were investigated and pollution levels were assessed using the single factor pollution index (SFPI), Nemerow integrated pollution index (NIPI), and potential ecological risk coefficient (PERC). The results showed that the average concentrations of heavy metals in greenbelt soils exceeded their background values, with the SFPI results ranked Cd > Pb > Cr > Cu > Zn, and the mean NIPI was 2.72 indicating that the greenbelt soils are moderately polluted. The PERC of each heavy metal (Cr, Cu, Zn, and Pb) was less than 10, indicating that the greenbelt soils present a slight ecological risk, while the PERC of Cd reached 97.32, indicating a strong ecological risk. The composite PERC of all heavy metals was less than 150, indicating a slight ecological risk overall. The five heavy metals showed a patchy spatial distribution, with high concentrations of Cr, Cu, Zn, and Pb in the greenbelt soils of northeast areas, and high concentrations of Cd in the southwest and northwest. Based on the results of study, Cd pollution in greenbelt soils in main areas of Nanjing City is relatively serious, which requires further attention.
对江苏省南京市主要区域绿化带土壤中重金属（铬、铜、锌、铅和镉）的含量及空间分布进行了调查，并采用单因子污染指数（SFPI）、内梅罗综合污染指数（NIPI）和潜在生态风险系数（PERC）对污染水平进行了评估。结果表明，绿化带土壤中重金属的平均含量超过了其背景值，SFPI结果排序为镉>铅>铬>铜>锌，平均NIPI为2.72，表明绿化带土壤受到中度污染。各重金属（铬、铜、锌和铅）的PERC小于10，表明绿化带土壤存在轻微生态风险，而镉的PERC达到97.32，表明存在较强生态风险。所有重金属的综合PERC小于150，表明总体生态风险轻微。这五种重金属呈现出斑块状空间分布，东北部地区绿化带土壤中铬、铜、锌和铅含量较高，西南部和西北部镉含量较高。基于研究结果，南京市主要区域绿化带土壤中的镉污染相对严重，需要进一步关注。
