Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan.
Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, 23 St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK.
Environ Sci Pollut Res Int. 2022 Aug;29(36):54855-54864. doi: 10.1007/s11356-022-19753-3. Epub 2022 Mar 21.
One of the major environmental problems is the fast accumulation of brick kiln emissions near the peripheries of almost all urban centers. An enormous quantity of substandard coal, wood, rubber tires, or saw wood is used as fuel in these brick kilns, creating environmental pollution through carbon and heavy metals present in the emissions. The present study was designed to determine the distribution pattern of heavy metals in a soil-water-plant system under the influence of brick kiln emissions. Ash, soil (0-15 cm), water, and plant samples were collected from the adjacent areas of the brick kilns. Geo-accumulation index and contamination factors were used to assess the toxicity of metals to soil and plants. It was found that the concentrations of Cd in water, soil, coal, and plant samples were found in the range of 0.004-0.024 mg L, 0.02-0.66, 0.002-0.042, and 0.06 to 0.07 mg kg, respectively, while Pb concentration was found within the range of 0-0.08 mg L, 0.30-8.60, 0.011-0, and 0.01-0.08 mg kg in water, soil, and plant samples, respectively. The concentration of Cd in brick kilns ash was in the range of 0-0.04 mg kg while Pb was found within the range of 0.01-0.05 mg kg for ash. Geo-accumulation index and contamination factor values for Cd were found higher suggesting proper pollution prevention measures to be implemented. Based on the results, it was concluded that Cd concentrations in soil, plants, and water samples were higher in the subject area due to brick kiln emissions and higher Cd concentrations in the fuel material.
其中一个主要的环境问题是，几乎所有城市中心的周边地区都有砖窑排放物的快速积累。这些砖窑使用了大量的劣质煤、木材、橡胶轮胎或锯木作为燃料，排放物中的碳和重金属造成了环境污染。本研究旨在确定砖窑排放物影响下土壤-水-植物系统中重金属的分布模式。从砖窑附近地区采集了灰分、土壤（0-15 厘米）、水和植物样本。采用地质累积指数和污染因子来评估金属对土壤和植物的毒性。结果发现，水样、土样、煤样和植物样中 Cd 的浓度分别在 0.004-0.024mg/L、0.02-0.66、0.002-0.042 和 0.06-0.07mg/kg 范围内，而 Pb 的浓度分别在 0-0.08mg/L、0.30-8.60、0.011-0、0.01-0.08mg/kg 范围内。砖窑灰分中 Cd 的浓度在 0-0.04mg/kg 范围内，而 Pb 的浓度在 0.01-0.05mg/kg 范围内。Cd 的地质累积指数和污染因子值较高，表明应采取适当的污染防治措施。根据研究结果得出结论，由于砖窑排放和燃料中 Cd 浓度较高，研究区域土壤、植物和水样中的 Cd 浓度较高。
