Synthesis and application of a new chitosan derivative for adsorption of Cu(II) and oxyanions of Cr(VI) from aqueous solution

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-02-09 DOI:10.1680/jenes.23.00010

Hércules Gidel Lucena de Sousa, Damien Prim, Flavien Bourdreux, L. Gil

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Abstract

This study describes the synthesis of a new bioadsorbent from chitosan using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent and its successful aplication for removal of cationic ion (Cu(II)) and oxyanion (Cr(VI)) from single component aqueous systems. The new multifunctionalized chitosan derivative (C1) was produced through chemical modification of primary hydroxyl function of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem of solubility of most chitosan derivatives. C1 was characterized by spectroscopic methods. The effects of solution pH, contact time, and initial solute concentration on removal of Cu(II) and Cr(VI) by C1 were investigated in aqueous solutions. C1 showed experimental maximum adsorption capacity of 106 mg g−1 for Cu(II) and 194 mg g−1 for Cr(VI).

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用于吸附水溶液中的铜(II)和铬(VI)氧阴离子的新型壳聚糖衍生物的合成与应用

本研究介绍了利用乙二胺四乙酸二酐（EDTAD）作为改性剂，从壳聚糖中合成一种新型生物吸附剂，并将其成功应用于去除单组分水体系中的阳离子（Cu(II)）和氧阴离子（Cr(VI)）。新的多功能壳聚糖衍生物（C1）是用 EDTAD 对壳聚糖的伯羟基官能团进行化学修饰，引入羧基和叔胺官能团，同时保持壳聚糖表面的仲胺官能团而制成的。这种转变对于提高壳聚糖的吸附潜力非常重要，而且还能让 C1 在酸性介质中使用，从而解决大多数壳聚糖衍生物的溶解性问题。C1 采用光谱方法进行表征。研究了 C1 在水溶液中的 pH 值、接触时间和初始溶质浓度对去除铜（II）和铬（VI）的影响。C1 对 Cu(II) 和 Cr(VI) 的最大吸附容量分别为 106 mg g-1 和 194 mg g-1。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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