Although the removal of arsenic from water using chitosan-WTRs adsorbent made by the embedding method has been extensively studied, the adsorption capacity is significantly lower than that of origin WTRs. In this paper, the WTRs-chitosan beads made by homogeneous method (WCB) were used as effective As(III) adsorbents. In order to obtain a better oxidation ability, MnO₂ was added to WCB to make Mn-WCB, which was compared with WCB through various experiments to verify the optimization effect. Both adsorbents have carried out a variety of characterization and adsorption efficiency experiments. The physicochemical properties and adsorption capacities of WCB and Mn-WCB were compared, and the adsorption mechanism of Mn-WCB was analyzed. Under neutral conditions, the maximum adsorption capacity estimated according to the Langmuir isotherm model were 28.607 mg/g and 36.911 mg/g, respectively. By comparison, adding manganese dioxide to WCB can effectively increase the adsorption capacity and enhance the regeneration performance, also the pore structure and acid resistance have been improved. The experimental results proved that both WCB and Mn-WCB are good As(III) adsorbents, and Mn-WCB was obviously better than WCB in terms of adsorption capacity and structure, indicating that the addition of MnO₂ in WTR-chitosan beads is an effective optimization method for As(III) removal.

尽管使用包埋法制备的壳聚糖-WTRs 吸附剂去除水中的砷已得到广泛研究，但其吸附能力明显低于原始 WTRs。在本文中，采用均相法 (WCB) 制备的 WTRs-壳聚糖珠用作有效的 As(III) 吸附剂。为了获得更好的氧化能力，MnO ₂加入WCB制成Mn-WCB，通过各种实验与WCB进行对比，验证优化效果。两种吸附剂都进行了多种表征和吸附效率实验。比较了WCB和Mn-WCB的理化性质和吸附能力，分析了Mn-WCB的吸附机理。在中性条件下，根据 Langmuir 等温线模型估计的最大吸附容量分别为 28.607 mg/g 和 36.911 mg/g。相比之下，在WCB中加入二氧化锰可以有效提高吸附容量，增强再生性能，同时改善了孔隙结构和耐酸性。实验结果证明 WCB 和 Mn-WCB 都是良好的 As(III) 吸附剂，₂在WTR-聚氨基葡糖珠为作为（III）的去除的有效的优化方法。