Preparation and Pb2+ Removal Capacity of Phosphorylated Lignin

被引：0
|
作者：
Pang Y.-X. [1 ]
Cai M. [1 ]
Lou H.-M. [1 ,2 ]
机构：
[1] School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, Guangdong
[2] State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, Guangdong
来源：
| 1600年 / South China University of Technology卷 / 45期
基金：
中国国家自然科学基金;
关键词：
Adsorption; Alkali lignin; Electrostatic interaction; Ion exchange; Phosphorylation;
D O I：
10.3969/j.issn.1000-565X.2017.06.015
中图分类号：
学科分类号：
摘要：
Due to its limited adsorption capacity for metal ions in aqueous solutions, alkali lignin is unsuitable for direct industry application as an absorbent of heavy metals. In this paper, a phosphorylation modification of alkali lignin was carried out, and the adsorption capacity of the phosphorylated alkali lignin (PAL) for Pb2+ was investigated by means of IR, particle charge detection, SEM and atomic absorption spectroscopy, followed with a mechanism exploration. The results indicate that (1) after the phosphorylation, the surface of lignin becomes coarse and porous, the specific surface area increases from 2.12 to 11.17m2/g, and the adsorption process becomes fast, with a higher adsorption capacity of Pb2+; (2) the adsorption mainly depends on the electrostatic interaction between Pb2+ and such negative functional groups as phosphate, phenolic hydroxyl and carboxyl, as well as on the ion exchange between H+ and Pb2+; (3) the Pb2+ removal capacity of PAL is mainly affected by the PAL mass, the initial mass concentration of Pb2+, the pH value and the temperature; and (4) the Pb2+ removal increases with the increase of PAL mass and pH value, and reaches the maximum 92.36% at 30℃. © 2017, Editorial Department, Journal of South China University of Technology. All right reserved.
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页码：96 / 102
页数：6
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