文献类型：期刊文献

中文题名：海藻酸钠/研磨处理APT复合凝胶小球对亚甲基蓝吸附研究

英文题名：The absorption properties of Na Alg/grinded APT composite beads for MB

作者：施小宁[1];张浩波[1];陈晖[1];戴红霞[1];段国建[1]

第一作者：施小宁

机构：[1]甘肃中医药大学药学院

第一机构：甘肃中医药大学药学院（西北中藏药协同创新中心办公室）

年份：2017

卷号：46

期号：11

起止页码：2178

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：甘肃省科技计划资助项目(148RJZA074);甘肃中医药大学中青年基金项目(2305016601)

语种：中文

中文关键词：海藻酸钠;碾磨处理APT;亚甲基蓝;吸附性能;动力学模型

外文关键词：sodium alginate;;grinded APT;;methylene blue;;absorption properties;;kinetic model

摘要：将碾磨酸处理凹凸棒黏土(G-APT)与海藻酸钠(NaAlg)物理共混,与CaCl_2固化交联,制备NaAlg/G-APT复合凝胶小球,考察了复合凝胶小球对印染废水中亚甲基蓝(MB)的吸附性能。场发射扫描电镜(FESEM)表征表明,适当次数研磨,可使APT棒晶束有效解离,使其在复合凝胶中均匀分散。复合凝胶小球对MB平衡吸附量(q_e)随APT碾磨次数增加呈先增大后减小趋势,APT碾磨4次时,q_e最大,为167.2 mg/g,相对于APT未碾磨处理样提高48.5%。达到最大吸附量的最佳MB初始浓度为200 mg/L,pH值为6.0,吸附时间120 min。吸附动力学过程符合准二级动力学模型,用Langmuir吸附等温线模型描述更为合适,属于单分子层吸附。
The sodium alginate/grinded attapulgite( NaAlg/G-APT) composite bead was prepared simply through Ca^(2+)crosslinking of sodium alginate( NaAlg) and grinding treatment of attapulgite( G-APT),and its adsorption properties for methylene blue( MB) from MB-contained wastewater was investigated. The morphologies of the composite bead were characterized by field emission scanning electron microscope( FESEM) and the results show that the proper times of grinding can dissociate APT rod crystal bundle effectively,which is benefit to disperse into the composite gel network. The effect of APT grinding times on the equilibrium absorption capacity( q_e) for MB was also investigated,and the q_eincreases with increasing APT grinding times from 0 to 4 times,and reached the maximum q_e( 167. 2 mg/g) at 4 grinding times,compared with APT,the sample was improved by 48. 5%. The maximum q_ecould be reached under the optimal condition,200 mg/L initial concentration of MB,6. 0 of the solution pH value,and 120 min of the adsorption time. The adsorption kinetics of MB onto the composite bead is best described by a pseudo-second-order equation and the adsorption isotherms more conform to the Langmuir isothermal adsorption equation,suggesting that the adsorption was a monolayer process.