University of Agriculture and Environmental Sciences, Umuagwo, Nigeria.
Department of Soil Science and Environment, Imo State University, Owerri, Nigeria.
Environ Monit Assess. 2024 Oct 7;196(11):1025. doi: 10.1007/s10661-024-13126-8.
The present study assessed the impact of municipal solid waste dump on the degradation of soil around Orji dump site. A total of 15 soil samples were collected for this study. Twelve soil samples were collected around the dump site at 0 m, 10 m, and 20 m distance and three from Imo State University (IMSU) research farm as control. The samples were collected from the east, west, north, and south of the dump site. The samples were subjected to laboratory analyses. The mean results obtained indicate that the values of the dump site soil parameters analyzed ranged from 86.67 to 89.00% (sand), 4.33 to 5.67% (silt), 7.00 to 7.67% (clay), 6.80 to 7.50 (pH), 4.33 to 7.00 dS m electric conductivity (EC), 0.0028 to 0.0045 mg kg (salinity), 2.36 to 3.76% soil organic matter (SOM), 24.13 to 38.93 cmolc kg cation exchange capacity (CEC), 4.50 to 9.57 cmolc kg calcium (Ca), and 1.0 to 2.25 cmolc kg magnesium (Mg). At the control, mean values were 81.24% (sand), 6.39% (silt), 12.45% (clay), 5.69 (pH), 0.47 dS m (EC), 0.0005 mg kg (salinity), 1.99% (SOM), 5.08 cmolc kg (CEC), 2.17 cmolc kg (Ca), and 1.67 cmolc kg (Mg). These values showed substantial enrichment. Correlations indicate that EC, salinity, and CEC majorly determined the availability of most of the parameters analyzed. Soil degradation index (SDI) was used to determine degradation around the dump site. It ranged from 2.546.61% (0 m) to 1573.50% (10 m) and 1.603.73% (20 m). Thus, distance affected the rate of soil degradation in all directions away from the dump site.
本研究评估了城市固体废物倾倒场对奥吉（Orji）倾倒场周围土壤退化的影响。为此研究收集了总共 15 个土壤样本。12 个土壤样本是在倾倒场 0m、10m 和 20m 距离处以及在伊莫州立大学（IMSU）研究农场的三个位置收集的，作为对照。这些样本是从倾倒场的东、西、北、南四个方向采集的。样本经过实验室分析。获得的平均结果表明，分析的倾倒场土壤参数值范围为 86.67% 至 89.00%（砂）、4.33% 至 5.67%（粉砂）、7.00% 至 7.67%（粘土）、6.80% 至 7.50 pH 值（电导率）、4.33 至 7.00 dS m（EC）、0.0028 至 0.0045 mg kg（盐度）、2.36 至 3.76% 土壤有机质（SOM）、24.13 至 38.93 cmolc kg 阳离子交换容量（CEC）、4.50 至 9.57 cmolc kg 钙（Ca）和 1.0 至 2.25 cmolc kg 镁（Mg）。在对照点，平均值分别为 81.24%（砂）、6.39%（粉砂）、12.45%（粘土）、5.69（pH 值）、0.47 dS m（EC）、0.0005 mg kg（盐度）、1.99%（SOM）、5.08 cmolc kg（CEC）、2.17 cmolc kg（Ca）和 1.67 cmolc kg（Mg）。这些值显示出大量的富集。相关性表明，EC、盐度和 CEC 主要决定了分析的大多数参数的可用性。土壤退化指数（SDI）用于确定倾倒场周围的退化程度。它的范围为 2.546.61%（0m）至 1573.50%（10m）和 1.603.73%（20m）。因此，距离影响了所有方向上远离倾倒场的土壤退化速度。
