用蒙脱石粘土和细菌纤维素活性炭增强的海藻酸盐基水凝胶珠是一种从水溶液中去除染料的有效吸附剂。

IF 5 3区 化学 Q1 POLYMER SCIENCE
Gels Pub Date : 2024-09-16 DOI:10.3390/gels10090597
Muhammad Dody Isnaini, Bhawaranchat Vanichsetakul, Muenduen Phisalaphong
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引用次数: 0

摘要

针对与水污染有关的环境问题,本研究旨在通过将细菌纤维素活性碳(BCAC)和蒙脱石(MT)整合到海藻酸盐水凝胶(ALG)中,开发一种新型水凝胶珠,作为一种生物兼容的高效吸附剂。离子凝胶法被应用于 BCAC/MT/ALG 水凝胶珠的制造。BCAC/MT/ALG水凝胶珠的拉伸强度、杨氏模量和热稳定性均显著提高,对水溶液中亚甲基蓝(MB)的吸附吸收率是原始ALG珠的1.4倍。纹理特性(包括比表面积和孔隙率)有利于适应作为目标分子的阳离子甲基溴的大小。因此,在 pH 值为 7 和温度为 30 ℃ 的条件下,甲基溴的吸附量达到了 678.2 毫克/克。吸附等温线显示出非线性 Redlich-Peterson 等温线模型的最佳拟合。伪二阶动力学模型很好地描述了实验吸附数据,R2 值达到 0.997。此外,该吸附珠易于再生,重复利用率高,使用六次后甲基溴的去除率约为 75%。因此,BCAC/MT/ALG 珠子是一种环保、经济、高效的吸附剂,可用于去除水中的甲基溴,并有可能用于去除废水中的多种阳离子染料污染物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Alginate-Based Hydrogel Bead Reinforced with Montmorillonite Clay and Bacterial Cellulose-Activated Carbon as an Effective Adsorbent for Removing Dye from Aqueous Solution.

According to environmental concerns related to water pollution, this study aims to develop a novel hydrogel bead as a biocompatible and efficient adsorbent by integrating bacterial cellulose-activated carbon (BCAC) and montmorillonite (MT) in alginate hydrogel (ALG). The ionotropic gelation method was applied to the fabrication of BCAC/MT/ALG hydrogel beads. The BCAC/MT/ALG hydrogel bead exhibited significantly higher tensile strength, Young's modulus, and thermal stability, with ~1.4 times higher adsorption uptake of methylene blue (MB) from aqueous solution as compared to the pristine ALG bead. The textural properties, including specific surface area and porosity, were beneficial to accommodate the size of cationic MB as the target molecule. This resulted in a remarkable MB adsorption uptake of 678.2 mg/g at pH 7 and 30 °C. The adsorption isotherm showed the best fit for the nonlinear Redlich-Peterson isotherm model. Experimental adsorption data were well-described by the pseudo-second order kinetic model, with R2 values reaching 0.997. In addition, the adsorbent bead demonstrated easy regeneration with high reusability with approximately 75% of MB removal after being used for six cycles. Therefore, BCAC/MT/ALG bead represents an eco-friendly, cost-effective, and highly efficient adsorbent for MB removal from water and could potentially be used for removal of a wide range of cationic dye pollutants from wastewater.

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来源期刊
Gels
Gels POLYMER SCIENCE-
CiteScore
4.70
自引率
19.60%
发文量
707
审稿时长
11 weeks
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