Biowaste-derived hybrid adsorbent for efficient Cr (VI) removal

IF 4.8 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD Cellulose Pub Date : 2025-02-12 DOI:10.1007/s10570-025-06426-w

Saksham, Balbir Singh Kaith, Rakesh Kumar, Rohit Mehra, Manpreet Singh Bhatti

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Abstract

Sustainable solutions for efficient chromium (Cr) removal, particularly at low concentrations, remain a critical challenge. Present work outlines the development of a semi-interpenetrating polymer network (semi-IPN) for the effective removal of hexavalent chromium (Cr (VI)) ions from aqueous solutions. The semi-IPN was synthesized using a 1:1 (w/w) hybrid backbone of nanocellulose and pectin, with itaconic acid grafted onto it through a crosslinker-initiator system comprising N, N’-methylene bisacrylamide (MBA) and ammonium persulfate (APS) under microwave irradiation. Synthesis parameters were optimized using response surface methodology (RSM), resulting in a maximum grafting yield of 172.9%. The semi-IPN achieved an impressive Cr (VI) removal efficiency of 92.2% under optimal conditions: 0.2 g of adsorbent per 25 mL solution, pH 6.0, 120 min contact time, and an initial Cr (VI) concentration of 5 mg/L. Kinetic and isotherm studies indicated that the adsorption process conformed to a pseudo-second-order model and was best described by the Freundlich isotherm. The semi-IPN also showed strong recyclability, retaining 81.4% of its adsorption capacity after five cycles of reuse. These results highlight the potential of the semi-IPN as an effective, ecofriendly and reusable adsorbent for Cr (VI) ion removal.

Graphical Abstract

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高效去除铬（VI）的生物废物来源的混合吸附剂

有效去除铬（Cr）的可持续解决方案，特别是在低浓度下，仍然是一个严峻的挑战。目前的工作概述了半互穿聚合物网络（半ipn）的发展，用于从水溶液中有效去除六价铬（Cr (VI)）离子。采用纳米纤维素与果胶1:1 （w/w）的杂化骨架，通过N， N ' -亚甲基双丙烯酰胺（MBA）和过硫酸铵（APS）组成的交联剂-引发剂体系接枝衣通酸，在微波辐照下合成了半ipn。采用响应面法（RSM）对合成参数进行优化，最大接枝率为172.9%。在最佳条件下，半ipn的Cr （VI）去除率为92.2%：每25 mL溶液中吸附剂0.2 g， pH为6.0，接触时间为120 min，初始Cr （VI）浓度为5 mg/L。动力学和等温线研究表明，吸附过程符合拟二阶模型，Freundlich等温线最能描述吸附过程。半ipn具有较强的可回收性，在重复使用5次后仍能保持81.4%的吸附容量。这些结果突出了半ipn作为一种有效的、环保的、可重复使用的Cr （VI）离子吸附剂的潜力。图形抽象

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.