Key Laboratory of Grassland Ecosystem of Ministry of Education, College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu Province, China.
PeerJ. 2024 Nov 15;12:e18510. doi: 10.7717/peerj.18510. eCollection 2024.
Industrial parks in China are centers of intensive chemical manufacturing and other industrial activities, often concentrated in relatively small areas. This concentration increases the risk of soil pollution both within the parks and in surrounding areas. The soils of the Tibetan Plateau, known for their high sensitivity to environmental changes, are particularly vulnerable to human activity. In this study, we examined the concentrations (mg/kg) of 10 metal elements (As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, Se, and Zn) in soils at depths of 0-10 cm, 10-20 cm, and 20-30 cm from the surface at three distances (500 m, 1000 m, and 1500 m from the park boundary) on the east, south, west, and north sides of the Tianzhu Industrial Park on the Qinghai-Tibet Plateau. The concentrations of As, Cr, Mn, and Pb were close to the standard reference values for the Qinghai-Tibet Plateau, while Cu, Ni, Se, and Zn levels were found to be 1.6-2.2 times higher than the reference values. Cd and Hg concentrations were particularly concerning, at 8.0 and 6.5 times higher than reference values, respectively. The potential ecological risk indexes indicated persistent risk levels for Cd and Se across various directions and distances. Variations in soil depth and direction were observed for the concentrations of As, Cd, Hg, Pb, Se, and Zn, underscoring the need for regular or long-term monitoring. Cd, in particular, presents a significant hazard due to its high concentration and its propensity for uptake by plants in the study area.
中国的工业园区是密集型化工制造和其他工业活动的中心，通常集中在相对较小的区域内。这种集中增加了园区内和周边地区土壤污染的风险。青藏高原的土壤以对环境变化高度敏感而闻名，特别容易受到人类活动的影响。在本研究中，我们检测了青藏高原天祝工业园区东、南、西、北四个方向，距离园区边界 500m、1000m 和 1500m 处 0-10cm、10-20cm 和 20-30cm 深度土壤中 10 种金属元素（砷、镉、铬、铜、汞、锰、镍、铅、硒和锌）的浓度（mg/kg）。砷、铬、锰和铅的浓度接近青藏高原的标准参考值，而铜、镍、硒和锌的浓度分别比参考值高出 1.6-2.2 倍。镉和汞的浓度尤其令人担忧，分别是参考值的 8.0 倍和 6.5 倍。潜在生态风险指数表明，在各个方向和距离上，镉和硒都存在持续的风险。土壤深度和方向的变化对砷、镉、汞、铅、硒和锌的浓度产生了影响，这表明需要进行定期或长期监测。特别是镉，由于其高浓度和在研究区域内被植物吸收的倾向，构成了重大危害。
