共价交联粉煤灰/聚（丙烯酸-co-丙烯酰胺）复合微凝胶作为新型Pb²⁺离子磁性选择性吸附剂。

Covalently crosslinked fly ash/poly(acrylic acid-co-acrylamide) composite microgels as novel magnetic selective adsorbent for Pb²⁺ ion.

作者信息

Jiang Liping, Liu Peng

机构信息

State Key Laboratory of Applied Organic Chemistry and Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China; Chemical Department, Lanzhou University of Arts and Science, Lanzhou 730000, China.

State Key Laboratory of Applied Organic Chemistry and Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.

出版信息

J Colloid Interface Sci. 2014 Jul 15;426:64-71. doi: 10.1016/j.jcis.2014.03.045. Epub 2014 Apr 3.

DOI:10.1016/j.jcis.2014.03.045

PMID:24863766

Abstract

In order to improve the performance of treating waste-water with wastes, the magnetic fly ash (FA) particles were surface-modified with polymerizable groups as the crosslinker for the copolymerization with acrylic acid (AA) and acrylamide (AM) by a facile inverse suspension polymerization process, without any foreign organic crosslinker added. The optimized beadlike magnetic fly ash/poly(acrylic acid-co-acrylamide) composite microgels (FA/P(AA-AM)) with 3-dimensional crosslinking skeleton structure were selected as the magnetic selective microgel adsorbent for Pb(2+) ion, through a series of L(9)(3(4)) orthogonal experiments. It was found that the magnetic FA particles could improve the strength stability of the FA/P(AA-AM) composite microgels, also provide the ability of magnetic separation.

摘要

为了提高利用废弃物处理废水的性能，通过简便的反相悬浮聚合工艺，用可聚合基团对磁性粉煤灰（FA）颗粒进行表面改性，使其作为交联剂与丙烯酸（AA）和丙烯酰胺（AM）共聚，且不添加任何外来有机交联剂。通过一系列L(9)(3(4))正交实验，选择具有三维交联骨架结构的优化珠状磁性粉煤灰/聚（丙烯酸-共-丙烯酰胺）复合微凝胶（FA/P(AA-AM)）作为Pb(2+)离子的磁性选择性微凝胶吸附剂。研究发现，磁性FA颗粒可以提高FA/P(AA-AM)复合微凝胶的强度稳定性，还能提供磁分离能力。