Environmental Systems and Climate Change Programme, Africa Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria.
Department of Physics, College of Physical Sciences, Federal University of Agriculture, Abeokuta, Nigeria.
Environ Monit Assess. 2023 Feb 9;195(3):375. doi: 10.1007/s10661-023-10914-6.
This study presents the assessment of the air, soil, and water quality within the residential communities around two passive limestone mining/cement factories. The associations between the pollutants were tested across the media, within each medium, between the layers, and between two groups of the communities. The mean values for the PM, PM, and PM were 65.8 µgm, 50.1, and 73.7, respectively, in the air; for the Mn, Fe, Cu, Zn, Cr, K-40, U-238, and Th-232 were 0.433 g/kg, 8.950, 0.005, 0.054, 0.104, 161.57 Bq. kg, 61.10, and 15.85, respectively, in the topsoil; 0.365 g/kg, 8.259, 0.004, 0.029, 0.057, 71.84 Bq. kg, 16.37, 4.66, respectively, in the subsoil; and for the Mn, Fe, and Zn were 0.190, 1.499, and 0.256 mg/l, respectively, in the water. The PM, Fe, and K-40 were the most abundant pollutants. The Co and Mn, Zn and Cu, Fe and Cu, the absorbed dose rate (ADR) and K-40, and ADR and U-238 correlated significantly. Though the Ibese group was more polluted than the Ewekoro group, the generally low levels of the pollutions were confirmatory of the earlier suspicions of the mining/production activities. The 2nd lithological layer at 0.5 to 1.9 m depths or the 3rd lithological layer at 1.1 to 7.69 m depths for the Ibese group and the 1st layer at the surface or the 2nd layer at 0.5 m depth for the Ewekoro group are protective layers for the groundwater that must not be exploited, given the three classes of groundwater vulnerability indices observed in the area.
本研究评估了两个被动石灰岩采矿/水泥厂周围居民区的空气、土壤和水质。在整个介质中、每个介质内部、各层之间以及两个社区群体之间，对污染物之间的关联进行了测试。空气中的 PM10、PM2.5 和 PM1 平均值分别为 65.8µgm、50.1 和 73.7；表层土壤中的 Mn、Fe、Cu、Zn、Cr、K-40、U-238 和 Th-232 分别为 0.433g/kg、8.950、0.005、0.054、0.104、161.57Bq.kg、61.10 和 15.85；底层土壤中的 Mn、Fe 和 Zn 分别为 0.365g/kg、8.259、0.004、0.029、0.057、71.84Bq.kg、16.37 和 4.66；水中的 Mn、Fe 和 Zn 分别为 0.190、1.499 和 0.256mg/l。PM、Fe 和 K-40 是最丰富的污染物。Co 和 Mn、Zn 和 Cu、Fe 和 Cu、吸收剂量率 (ADR) 和 K-40 以及 ADR 和 U-238 之间存在显著相关性。尽管 Ibese 组比 Ewekoro 组污染更严重，但总体上污染水平较低证实了人们对采矿/生产活动的早期怀疑。Ibese 组的第二层（0.5 至 1.9 米深）或第三层（1.1 至 7.69 米深），以及 Ewekoro 组的第一层（地表）或第二层（0.5 米深）是必须加以保护的地下水保护层，因为该地区观察到了三类地下水脆弱性指数。
