Deterioration in soil–water environment severely contributed by heavy metal bioavailability and mobility on soil surface and sub-surface due to irrational increase in wastewater discharge and agrochemical activities. Therefore, the feasibility of adsorption characteristics of the soil is paramount in curbing the problem of micropollutant contamination in the farming vicinity. Soil from a farming site in a populated area in Enugu, Nigeria was collected and tested to measure the lead and cadmium contents using atomic absorption spectrophotometer (AAS). The adsorption potency of the ultisol soil was estimated for identifiable physicochemical properties by standard technique. The mean activity concentration of Pb²⁺ and Cd²⁺ was 15.68 mg/kg and 3.01 mg/kg. The pH, temperature, metal concentration and contact time adsorptive effect on the Pb²⁺ and Cd²⁺ uptake was evaluated by batch adsorption technique. The Langmuir, Freundlich and Temkin models were fitted into equilibrium adsorption data and the calculated results depict a better and satisfactory correlation for Langmuir with higher linear regression coefficients (Pb²⁺, 0.935 and Cd²⁺, 0.971). On the basis of sorption capacity mechanism of the soil, pseudo-second-order model best described the kinetics of both metal ions retention process. The results of the present study indicated that the soil being a low cost-effective adsorbent can be utilized to minimize the environmental risk impact of these metal ions.

由于废水排放和农业化学活动的不合理增加，重金属的生物利用度和土壤表层和次表层的迁移性严重地加剧了土壤-水环境的恶化。因此，土壤吸附特性的可行性对于解决农业附近微污染物污染的问题至关重要。收集了尼日利亚埃努古人口稠密地区的一个农场的土壤，并使用原子吸收分光光度计（AAS）进行了测试，以测量铅和镉的含量。通过标准技术估算了ultisol土壤的吸附力，以用于可识别的理化性质。Pb ²⁺和Cd ²⁺的平均活性浓度分别为15.68 mg / kg和3.01 mg / kg。通过分批吸附技术评价了pH，温度，金属浓度和接触时间对Pb ²⁺和Cd ²⁺吸收的吸附效果。将Langmuir，Freundlich和Temkin模型拟合到平衡吸附数据中，并且计算结果表明，具有较高线性回归系数（Pb 2 ⁺，0.935和Cd ²⁺，0.971）。根据土壤的吸附能力机理，拟二级模型最能描述两种金属离子保留过程的动力学。本研究的结果表明，土壤是一种低成本的吸附剂，可用于最大程度地减少这些金属离子对环境风险的影响。