Biosorption using modified biochar has been increasingly adopted for the sustainable removal of uranium-contaminated from an aqueous solution. In this research study, the facile preparation and surface characteristics of magnetized biochar derived from waste watermelon rind to treat U(VI) contaminated water were investigated. The porosity, specific surface area, adsorption capacity, reusability, and stability were effectively improved after the magnetization of biochar. The kinetics and isotherm studies found that the U(VI) adsorption was rate-limiting monolayer sorption on the homogeneous surface of magnetized watermelon rind biochar (MWBC). The maximum adsorption capacity was found to be 323.56 mg of U(VI) per g of MWBC at pH 4.0 and 293 K that was higher than that of watermelon rind biochar (WBC) (135.86 mg g⁻¹) and other sourced biochars. The surface interaction mechanism, environmental feasibility, applicability for real-filed water treatment studied in the electromagnetic semi-batch column, and reusability of MWBC were also explored. Furthermore, salient raised the ion exchange and complexation action capacity of MWBC due to the presence of Fe oxide. The overall results indicated that MWBC was not only inexpensive and had a high removal capacity for U(VI), but it also easily enabled phase separation from an aqueous solution, with more than three times reusability at a minimum removal capacity of 99%.

使用改性生物炭的生物吸附越来越多地被用于从水溶液中可持续去除铀污染。在这项研究中，研究了从西瓜皮中提取的磁化生物炭处理 U(VI) 污染水的简便制备和表面特性。生物炭磁化后的孔隙率、比表面积、吸附能力、重复使用性和稳定性均得到有效提高。动力学和等温线研究发现，U(VI) 吸附是磁化西瓜皮生物炭 (MWBC) 均匀表面上的限速单层吸附。发现最大吸附容量为每克 MWBC 323.56 mg U(VI) 在 pH 4.0 和 293 K 时高于西瓜皮生物炭 (WBC) (135.86 mg g ^-1) 和其他来源的生物炭。还探讨了电磁半间歇柱中研究的表面相互作用机制、环境可行性、实际水处理的适用性以及 MWBC 的可重复使用性。此外，由于Fe氧化物的存在，突出提高了MWBC的离子交换和络合作用能力。总体结果表明，MWBC 不仅价格低廉且对 U(VI) 具有很高的去除能力，而且还易于从水溶液中实现相分离，在 99% 的最小去除能力下具有 3 倍以上的可重复使用性。