School of Environment, Northeast Normal University, Changchun, 130024, China; Key Laboratory for Vegetation Ecology, Ministry of Education, Changchun, 130024, China.
College of Water Conservancy and Environmental Engineering, Changchun Institute of Technology, Changchun, 130012, China.
Environ Pollut. 2021 Mar 1;272:116038. doi: 10.1016/j.envpol.2020.116038. Epub 2020 Nov 27.
Soil ecological risk caused by compound pollutants is a topic that deserves increasing attention, and soil risk early warning is a more in-depth discussion on this topic. In this study, we collected soil samples from Changchun, a typical industrial city, and determined the contents of 13 heavy metals (HMs) (0.00 mg kg-6380 mg kg), 16 polycyclic aromatic hydrocarbons (PAHs) (0.00 mg kg-27.7 mg kg), 7 polychlorinated biphenyls (PCBs) (0.30 μg kg-168 μg kg), and 8 organochlorine pesticides (OCPs) (0.00 mg kg-4.52 mg kg). The soil ecological risks of compound pollutants were assessed. The results showed that PAHs were the greatest risk pollutants, followed by PCBs and HMs, and OCPs were the smallest risk pollutants. Most of the ecological risks of compound pollutants were classified as "moderate severity" level according to the (contamination severity index) CSI evaluation criteria. With the help of modern industrial economic theory, through the analysis of the annual accumulation of pollutants, it is possible to predict the future pollutant content in Changchun, and the soil risks could be forewarned. The results showed that if active measures were not taken to reduce the accumulation of PAHs in Changchun soil, the CSI-PAHs would be classified as "ultra-high severity" level in 2035.
土壤中复合污染物造成的生态风险是一个值得日益关注的话题，而土壤风险预警则是对此话题的更深入探讨。在本研究中，我们采集了长春市典型工业城市的土壤样本，测定了 13 种重金属（HMs）（0.00mgkg-6380mgkg）、16 种多环芳烃（PAHs）（0.00mgkg-27.7mgkg）、7 种多氯联苯（PCBs）（0.30μgkg-168μgkg）和 8 种有机氯农药（OCPs）（0.00mgkg-4.52mgkg）的含量。评估了复合污染物的土壤生态风险。结果表明，PAHs 是最大的风险污染物，其次是 PCBs 和 HMs，OCPs 是最小的风险污染物。根据（污染严重指数）CSI 评价标准，大多数复合污染物的生态风险被归类为“中度严重”水平。借助现代工业经济理论，通过对污染物年积累量的分析，可以预测长春未来的污染物含量，实现土壤风险预警。结果表明，如果不采取积极措施减少长春市土壤中 PAHs 的积累，到 2035 年，CSI-PAHs 将被归类为“超高严重”水平。
