AI Article Synopsis
- The study highlights the ecological risks posed by compound pollutants in soil, specifically in Changchun, an industrial city.
- Samples were analyzed for 13 heavy metals, 16 polycyclic aromatic hydrocarbons, 7 polychlorinated biphenyls, and 8 organochlorine pesticides, finding PAHs to be the most hazardous, followed by PCBs and heavy metals, while OCPs posed the least risk.
- The research predicts that without intervention, the risk level for PAHs could escalate to "ultra-high severity" by 2035, emphasizing the need for proactive measures to manage soil pollution.
Article Abstract
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.
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| http://dx.doi.org/10.1016/j.envpol.2020.116038 | DOI Listing |
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