Adsorption performance of silver ion on acrylic grafted carboxymethyl chitosan/dialdehyde starch

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL Adsorption Pub Date : 2024-06-09 DOI:10.1007/s10450-024-00501-7

Jinyu Ouyang, Luqi Zhan, Qincong Luo, Jincheng Miao, Langrong Hu, Xiangqi He, Xiaojuan Wang

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Abstract

In the present study, the novel environmental-friendly adsorbent (PAA-g-CMCDAS) obtained from carboxymethyl chitosan (CMC), dialdehyde starch (DAS) and polyacrylic acid (PAA) is used for removing silver ion. The adsorbent characterized by XRD, SEM, TGA, BET and FTIR, was evaluated for removal of silver ion from aqueous solution. The adsorption process of silver ions conformed to Langmuir isotherm and the second-order kinetic mode. The maximum adsorption capacity for silver ions was 404.77 mg·g⁻¹, and the maximum removal efficiency was 95.05%. Also, the reusability and selectivity of PAA-g-CMCDAS was investigated, and the adsorption amount was still 388.77 mg·g⁻¹ and the removal efficiency was up to 91.29% after five times recycle; the removal efficiency of silver ions in mixed metal ions solution was 24.24% with the total removal efficiency of mixed metal ions 58%. Therefore, PAA-g-CMCDAS was an excellent silver ion adsorbent with good reusability.

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银离子在丙烯酸接枝羧甲基壳聚糖/二甲醛淀粉上的吸附性能

本研究使用由羧甲基壳聚糖（CMC）、二醛淀粉（DAS）和聚丙烯酸（PAA）制成的新型环保吸附剂（PAA-g-CMCDAS）去除银离子。通过 XRD、SEM、TGA、BET 和 FTIR 对吸附剂进行了特征描述，并对其从水溶液中去除银离子的能力进行了评估。银离子的吸附过程符合 Langmuir 等温线和二阶动力学模式。银离子的最大吸附容量为 404.77 mg-g-1，最大去除效率为 95.05%。同时还考察了 PAA-g-CMCDAS 的重复利用率和选择性，结果表明，经过五次重复利用后，PAA-g-CMCDAS 对银离子的吸附量仍为 388.77 mg-g-1，去除率高达 91.29%；对混合金属离子溶液中银离子的去除率为 24.24%，对混合金属离子的总去除率为 58%。因此，PAA-g-CMCDAS 是一种具有良好重复利用性的银离子吸附剂。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.