Preparation of nylon based magnetic adsorption materials and their adsorption properties for heavy metal ions

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-04-19 DOI:10.1007/s10450-024-00449-8

Weimin Yan, Chengmin Hou, Yuan Bai, Zhiyun Qian

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引用次数: 0

Abstract

Wastewater containing heavy metal ions poses great harm to human health and the environment. The adsorption materials used in traditional adsorption methods, such as starch and cellulose, are prone to hydrolysis, causing secondary pollution to water bodies. Nylon@Fe₃O₄@PAA adsorption material was obtained by using nylon as a substrate, activating nylon with sodium carbonate/hydrochloric acid, depositing a Fe₃O₄ magnetic layer by coprecipitation, and grafting polyacrylic acid. The adsorption material was used to explore the effects of different conditions (adsorption material dosage, Cu²⁺ concentration, pH value, and adsorption time) on the adsorption efficiency, adsorption capacity, and total adsorption amount of copper ions through changing the adsorption conditions. The research results showed that the adsorption material dosage was 31.25 mg (suspension solution with a concentration of 62.5 mg/mL was added with 300 μL), the concentration of Cu²⁺ solution was 20.48 mg/L, the adsorption time was 60 min, and the pH value was 9. The optimal adsorption efficiency was 82.29%, the optimal adsorption capacity was 154.87 mg/g, and the optimal total adsorption amount was 343.91 mg. After fitting thermodynamic and kinetic equations, the adsorption process of nylon@Fe₃O₄@PAA for Cu²⁺ ions dominated by chemical adsorption, with good adsorption rate and adsorption performance.

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尼龙基磁性吸附材料的制备及其对重金属离子的吸附特性

含有重金属离子的废水对人类健康和环境造成极大危害。传统吸附方法中使用的淀粉、纤维素等吸附材料容易水解，对水体造成二次污染。尼龙@Fe3O4@PAA吸附材料是以尼龙为基材，用碳酸钠/盐酸活化尼龙，共沉淀法沉积Fe3O4磁性层，再接枝聚丙烯酸而得到的。通过改变吸附条件，探索不同条件（吸附材料用量、Cu2+浓度、pH值和吸附时间）对铜离子的吸附效率、吸附容量和吸附总量的影响。研究结果表明，吸附材料用量为 31.25 mg（加入浓度为 62.5 mg/mL 的悬浮液 300 μL），Cu2+ 溶液浓度为 20.48 mg/L，吸附时间为 60 min，pH 值为 9，最佳吸附效率为 82.29%，最佳吸附容量为 154.87 mg/g，最佳吸附总量为 343.91 mg。经过热力学和动力学方程拟合，尼龙@Fe3O4@PAA 对 Cu2+ 离子的吸附过程以化学吸附为主，具有良好的吸附速率和吸附性能。

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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.