数字农科院2.0

Synthesis of amine-functionalized polystyrene resin-based globular adsorbents for efficient and selective removal of As and Sb species

文献类型： 外文期刊

作者： Xiao Yang;Wenjing Liu;Jiarui Kong;Xiangcheng Shan;Qiupei Lei;Zhipeng Yin;Runzeng Liu;Min Zhang;Qingzhe Zhang;Yongguang Yin;Chuanyong Jing;Yong Cai

作者机构：

关键词： Adsorption mechanism;Antimony;Arsenic;Polystyrene resins;Titanium dioxide

期刊名称： Chinese Chemical Letters

ISSN： 1001-8417

年卷期： 2025 年 36 卷 11 期

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版）

摘要： The removal of highly toxic arsenic (As) and antimony (Sb) contaminants in water by adsorption presents a great challenge worldwide. Conventional adsorbents exhibit insufficient efficacy for removing pentavalent oxyanions, As(V) and Sb(V), which are predominant compared with the trivalent species, As(III) and Sb(III), in surface waters. Here, we synthesized a novel composite adsorbent, amine-functionalized polystyrene resin loaded with nano TiO2 (AmPSd-Ti). The mm-scale spheres showed outstanding adsorption capacities for As(III), As(V), Sb(III), and Sb(V) at 73.85, 153.29, 86.80, and 123.71 mg/g, respectively. AmPSd-Ti exhibited selective adsorption for As and Sb in the presence of Cl−, NO3−, SO42−, and F−. As and Sb were adsorbed by the nano-sized TiO2 confined in the porous resin via forming inner-sphere complexes. The protonated amine groups enhanced the adsorption of As(V) and Sb(V) by electrostatic attraction and hydrogen bonding, which was confirmed by experimental results and molecular dynamics simulations. Fixed-bed column tests showed breakthrough curves with adsorption capacities of 1.38 mg/g (6600 BV) and 6.65 mg/g (1260 BV) upon treating real As-contaminated groundwater and Sb-contaminated industrial wastewater. Our study highlights a feasible strategy by incorporating inorganic metal oxides into organic polymers to achieve highly efficient removal of As and Sb in real-world scenarios.

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