Adsorption of methylene blue from wastewater using poly(acrylamide-co-itaconic acid-co-stearyl methacrylate) hydrogels

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-07-18 DOI:10.1016/j.polymer.2025.128837

Hidayet Mazi, Kevser Erbalci

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引用次数: 0

Abstract

In this study, copolymer hydrogels of itaconic acid with acrylamide and stearyl methacrylate were synthesized. Ammonium persulfate (APS), tetramethyl ethylenediamine (TMEDA) and methylenebisacrylamide (mBAAm) were used as initiators, catalysts and crosslinkers, respectively in the synthesis carried out at 60 °C. The effects of temperature and pH on swelling behavior were investigated. The synthesized hydrogels were used in the recovery of methylene blue (MB). Characterization of gels and MB adsorbed forms was done by SEM and FTIR techniques. The effects of temperature and pH of the solution on adsorption capacity were investigated. In adsorption processes carried out at different temperatures (between 25 and 70 °C), it was observed that the adsorption capacity increased as the temperature increased, reaching the maximum value (1658 mg/g) at 55 °C and starting to decrease after this temperature. Adsorption studies also revealed that the adsorption capacity increased with increasing solution pH. It was determined that the adsorption obeyed the Langmuir isotherm and the pseudo-second-order kinetic model. The reuse of the synthesized hydrogels in adsorption was also investigated. The results showed that there was a slight decrease in the adsorption capacity after 20 reuses and the desorption was around 91 %. MB desorbed by solvent washing technique was recovered. The results revealed that MB could be easily and economically recovered using the synthesized hydrogels.

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聚（丙烯酰胺- co -衣康酸- co -硬脂酰甲基丙烯酸酯）水凝胶对废水中亚甲基蓝的吸附研究

本研究合成了衣康酸与丙烯酰胺和硬脂酰甲基丙烯酸酯的共聚物水凝胶。以过硫酸铵（APS）、四甲基乙二胺（TMEDA）和亚甲基双丙烯酰胺（mBAAm）分别作为引发剂、催化剂和交联剂，在60℃下进行了合成。考察了温度和pH对膨胀行为的影响。合成的水凝胶用于亚甲基蓝（MB）的回收。通过SEM和FTIR技术对凝胶和MB吸附形式进行了表征。考察了溶液温度和pH对吸附量的影响。在不同温度（25-70℃）下进行的吸附过程中，观察到吸附量随着温度的升高而增加，在55℃时达到最大值（1658 mg/g），在该温度之后开始下降。吸附实验还发现，吸附量随溶液ph的增加而增加，吸附符合Langmuir等温线和拟二级动力学模型。并对合成的水凝胶在吸附中的再利用进行了研究。结果表明，重复使用20次后，吸附量略有下降，脱附率在91%左右。用溶剂洗涤法回收吸附的MB。结果表明，合成的水凝胶可以方便、经济地回收甲基溴。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.