[1]杨建红,丁园园,孙晓君,等.甲壳素/蒙脱石复合微球的制备及对二价铜离子吸附的研究[J].常州大学学报(自然科学版),2016,(06):78-85.[doi:10.3969/j.issn.2095-0411.2016.06.015]
　YANG Jianhong,DING Yuanyuan,SUN Xiaojun,et al.Preparation and Cu2+ Ion Adsorption Studies of Chitin/Montmorillonite Composite Microspheres[J].Journal of Changzhou University(Natural Science Edition),2016,(06):78-85.[doi:10.3969/j.issn.2095-0411.2016.06.015]
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甲壳素/蒙脱石复合微球的制备及对二价铜离子吸附的研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2016年06期
页码:
78-85
栏目:
环境科学与工程
出版日期:
2016-11-30

文章信息/Info

Title:
Preparation and Cu2+ Ion Adsorption Studies of Chitin/Montmorillonite Composite Microspheres
作者:
杨建红; 丁园园; 孙晓君; 刘王辉; 陈骏刚
常州大学 环境与安全工程学院,江苏 常州 213164
Author(s):
YANG Jianhong;  DING Yuanyuan;  SUN Xiaojun;  LIU Wanghui;  CHEN Jungang
School of Environment and Safety Engineering, Changzhou University, Changzhou 213164, China
关键词:
甲壳素;  蒙脱石;  复合微球;  吸附;  二价铜离子
Keywords:
chitin;  montorillonite;  composite microspheres;  adsorption;  Cu2+
分类号:
X 52
DOI:
10.3969/j.issn.2095-0411.2016.06.015
文献标志码:
A
摘要:
甲壳素在质量分数为8% NaOH/4% CO(NH2)2中冻融后和蒙脱石(MMT)共混成功制备了甲壳素/蒙脱石(CT/MMT)微球,采用FT-IR、XRD、SEM和TEM表征了其结构和形貌。CT/MMT微球被用来研究去除水中Cu2+。结果表明甲壳素/蒙脱石(CT/MMT)微球显示出优异的吸附水中Cu2+的能力。在5 mg/L的Cu2+溶液中,其吸附量可达19 mg/g。微球对Cu2+的吸附随MMT的量和pH的增加而增加。此外,溶液中盐离子类型也影响微球的吸附能力。对Cu2+的吸附过程,CT/MMT微球符合伪二级动力学方程及Freundlich吸附等温线。其吸附机理可能包括多种相互作用如静电吸引、金属螯合和离子交换。CT/MMT微球对重金属离子的吸附具有较好的选择性,其对不同重金属离子的吸附量由大到小的顺序为Pb2+、Cu2+、Ni2+。
Abstract:
Chitin/montmorillonite(CT/MMT)composite microspheres were prepared by blending MMT and chitin solution obtained via a freezing/thawing method in 8% NaOH/4% CO(NH2)2 aqueous solution, and then by coagulating with 10%HCl. Their structure and morphology were characterized by FT-IR, XRD, SEM and TEM techniques. These microspheres were studied for the removal of Cu2+ ions from the aqueous solution. The results showed that the composite microspheres exhibited efficient removal of Cu2+ ions from aqueous solution. Their adsorption capacity could reach about 19 mg/g in 5 mg/L of Cu2+ aqueous solution. The adsorption amount of Cu2+ ion on the composite microspheres increased with the increase of MMT amount and pH. In addition, the type of salt ions in aqueous solution was an important influence factor, too. The adsorption process was well explained with the pseudo-second-order kinetic equation and Freundlich adsorption isotherms. The major mechanism of the adsorption could be described as multi-interactions including electrostatic attraction, and metal chelation and ionic exchange. Adsorption of heavy metal ions by the CT/MMT microspheres had a good selectivity. The amount of different heavy metal ions adsorbed onto the composite microspheres was in the order of Pb2+,Cu2+,Ni2+ from high to low.

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备注/Memo

备注/Memo:
收稿日期:2016-06-07。基金项目:常州市科技支撑计划(社会发展)(CE20125036)。作者简介:杨建红(1970—),男,江苏武进人,博士,副教授,主要从事环境功能材料研究。
更新日期/Last Update: 2016-11-20