使用磺化纤维素作为吸附剂，实现了对多种金属离子的高效选择性吸附。

Efficient and selective adsorption of multi-metal ions using sulfonated cellulose as adsorbent.

机构信息

College of Graphic Communication and Packaging, Qilu University of Technology, Jinan, 250353, China; Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin, 300457, China.

College of Graphic Communication and Packaging, Qilu University of Technology, Jinan, 250353, China.

出版信息

Carbohydr Polym. 2016 Oct 20;151:230-236. doi: 10.1016/j.carbpol.2016.05.066. Epub 2016 May 20.

DOI:10.1016/j.carbpol.2016.05.066

PMID:27474562

Abstract

Contamination of heavy metal in wastewater has caused great concerns on human life and health. Developing an efficient material to eliminate the heavy metal ions has been a popular topic in recent years. In this work, sulfonated cellulose (SC) was explored as efficient adsorbent for metal ions in solution. Thermo gravimetric analyzer (TGA), X-ray diffraction (XRD) and Fourier-transform infrared spectrometer (FTIR) first analyzed the characterizations of SC. Subsequently, effects of solution pH, adsorbent loading, temperature and initial metal ion concentration on adsorption performance were investigated. The results showed that sulfonated modification of cellulose could decrease the crystallinity and thermostability of cellulose. Due to its excellent performance of adsorption to metal ions, SC could reach adsorption equilibrium status within as short as 2min. In multi-component solution, SC can orderly removes Fe(3+), Pb(2+) and Cu(2+) with excellent selectivity and high efficiency. In addition, SC is a kind of green and renewable adsorbent because it can be easily regenerated by treatment with acid or chelating liquors. The mechanism study shows that the sulfonic group play a major role in the adsorption process.

摘要

废水中重金属的污染对人类生活和健康造成了极大的关注。开发一种高效的材料来去除重金属离子已成为近年来的热门话题。在这项工作中，磺化纤维素（SC）被探索为溶液中金属离子的有效吸附剂。热重分析仪（TGA）、X 射线衍射（XRD）和傅里叶变换红外光谱（FTIR）首先分析了 SC 的特性。随后，考察了溶液 pH 值、吸附剂用量、温度和初始金属离子浓度对吸附性能的影响。结果表明，纤维素的磺化改性可以降低纤维素的结晶度和热稳定性。由于其对金属离子具有优异的吸附性能，SC 可以在短短 2 分钟内达到吸附平衡状态。在多组分溶液中，SC 可以对 Fe(3+)、Pb(2+)和 Cu(2+)进行有序去除，具有优异的选择性和高效率。此外，SC 是一种绿色可再生吸附剂，因为它可以通过酸处理或螯合液处理很容易地再生。机理研究表明，磺酸基在吸附过程中起主要作用。