Utilization of aminated lignin as an adsorbent to remove cationic and anionic dyes from aqueous solutions

IF 1.7 4区农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD Journal of Wood Chemistry and Technology Pub Date : 2022-02-17 DOI:10.1080/02773813.2022.2036194

Jiansong Chen, Liangliang An, Jihun Heo, J. Bae, H. Jeong, Yong Sik Kim

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引用次数: 10

Abstract

Abstract Lignin is a type of biomass that is generally found in nature and has a wide range of applications as a functional material. A novel sorbent, aminated lignin (AL), was synthesized in a one-step method to improve its adsorption capabilities. The AL was characterized through Brunauer–Emmett–Teller surface area analysis, thermogravimetric analysis, scanning electron microscopy, and zeta potential analysis. AL was small in size and had a clear obvious porous structure with a surface area of 47.1 m2·g−1, nearly ten times larger than that of kraft lignin, which was 4.75 m2·g−1. AL was utilized for the adsorption of cationic dyes (crystal violet, CV) and anionic dyes (Congo red, CR) from aqueous solutions. The maximum CV and CR adsorption of AL at 25 °C were 97.09 and 129.87 mg·g−1, respectively. Five factors affecting adsorption including adsorption time, pH of dyes, initial dye concentration, AL dosage, and adsorption temperature were investigated. The fitting results of the two dyes revealed that the adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm equation. This study demonstrates that AL can be used as a low-cost adsorbent for both cationic and anionic dyes from wastewater.

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利用胺化木质素作为吸附剂从水溶液中去除阳离子和阴离子染料

摘要木质素是一种普遍存在于自然界的生物质，作为一种功能材料有着广泛的应用。一步法合成了一种新型吸附剂胺化木质素(AL)，以提高其吸附性能。通过布鲁诺尔-埃米特-泰勒表面积分析、热重分析、扫描电镜和zeta电位分析对AL进行了表征。AL体积小，具有明显的多孔结构，表面积为47.1 m2·g−1，是木质素的4.75 m2·g−1的近10倍。AL用于吸附水溶液中的阳离子染料(结晶紫，CV)和阴离子染料(刚果红，CR)。AL在25℃时的最大CV和CR吸附量分别为97.09和129.87 mg·g−1。考察了吸附时间、染料pH、染料初始浓度、AL投加量和吸附温度5个因素对吸附的影响。两种染料的拟合结果表明，吸附过程符合拟二级动力学和Langmuir等温线方程。本研究表明，AL可作为废水中阳离子和阴离子染料的低成本吸附剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Wood Chemistry and Technology 工程技术-材料科学：纸与木材

CiteScore

3.70

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization. JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.