Several approaches have been used to reduce the accumulation of heavy metals in aqueous solutions, including adsorption to the surface of agricultural waste. Batch studies have been performed in this study to explore the adsorption of Fe²⁺, Mn²⁺ on olive pomace (OP), and moringa seed husk (MSH). Fourier transform infrared and scanning electron microscopy also characterized the prepared adsorbent. Batch adsorption studies were performed, and the effects of adsorbent chemical structure, adsorbent dosage, pH, contact time, and initial ion concentration were investigated on Fe and Mn ions sorption and mechanism in order to maximize the removal efficiency of Fe and Mn. It was shown that the removal percentage of Fe²⁺ and Mn²⁺ were 83% and 91%, respectively, at optimum pH 5 and optimum time of 120 min at 5 g of OP. Although the removal percentage of Fe²⁺ and Mn²⁺ were 80.5% and 93%, respectively, at 5 g of MSH. The pseudo-second-order model was followed by the adsorption kinetics of Fe²⁺ and Mn²⁺ on OP and MSH, and the Langmuir model worked well with the adsorption isotherms. Based on their adsorption/desorption processes, OP and MSH adsorbents may be regenerated by DI water more than five times. The overall adsorption power of the OP adsorbent for Fe²⁺ and Mn²⁺ was 10.406 and 10.460 mg/g, and the MSH was 10.28 and 11.641 mg/g for Fe²⁺ and Mn²⁺, respectively.

已经使用了几种方法来减少水溶液中重金属的积累，包括吸附到农业废物的表面。在这项研究中进行了批处理研究，以探索Fe 2 ⁺，Mn ²⁺在橄榄果渣（OP）和辣木种子皮（MSH）上的吸附。傅里叶变换红外和扫描电子显微镜还表征了所制备的吸附剂。进行了批量吸附研究，并研究了吸附剂化学结构，吸附剂用量，pH，接触时间和初始离子浓度对Fe和Mn离子吸附及其机理的影响，以最大程度地去除Fe和Mn。结果表明，Fe ²⁺和Mn ²⁺的去除率在5 g OP的最佳pH 5和120分钟的最佳时间下，它们分别为83％和91％。尽管在5 g MSH下，Fe ²⁺和Mn ²⁺的去除率分别为80.5％和93％。伪二阶模型后面是Fe ²⁺和Mn ²⁺在OP和MSH上的吸附动力学，Langmuir模型在吸附等温线下工作良好。根据它们的吸附/解吸过程，OP和MSH吸附剂可以用去离子水再生五次以上。的OP吸附剂Fe的总吸附能力²⁺和Mn ²⁺为10.406和10.460毫克/克，并且是MSH 10.28和11.641毫克/克为铁²⁺和Mn ²⁺， 分别。