[1]秦庆东,陈志真,傅大放,等.巯基化MCM-41对水中Hg(Ⅱ)的吸附[J].东南大学学报(自然科学版),2013,43(5):1011-1016.[doi:10.3969/j.issn.1001-0505.2013.05.019]
　Qin Qingdong,Chen Zhizhen,Fu Dafang,et al.Adsorption of Hg(Ⅱ)in water by thiol-functionalized MCM-41[J].Journal of Southeast University (Natural Science Edition),2013,43(5):1011-1016.[doi:10.3969/j.issn.1001-0505.2013.05.019]
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巯基化MCM-41对水中Hg(Ⅱ)的吸附()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
1011-1016
栏目:
环境科学与工程
出版日期:
2013-09-20

文章信息/Info

Title:
Adsorption of Hg(Ⅱ)in water by thiol-functionalized MCM-41
作者:
秦庆东1; 陈志真2; 傅大放1; 马军3
1东南大学土木工程学院, 南京 210096; 2中国市政工程中南设计研究总院有限公司, 武汉 430010; 3哈尔滨工业大学市政环境工程学院, 哈尔滨 150090
Author(s):
Qin Qingdong1;  Chen Zhizhen2;  Fu Dafang1;  Ma Jun3
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Central and Southern China Municipal Engineering Design and Research Institute Co., Ltd, Wuhan 430010, China
3School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
关键词:
巯基化MCM-41;  吸附;  Hg(Ⅱ);  等温线
Keywords:
thiol-functionalized MCM-41;  adsorption;  Hg(Ⅱ);  isotherm
分类号:
X703
DOI:
10.3969/j.issn.1001-0505.2013.05.019
摘要:
利用3-巯丙基三甲氧基硅烷对介孔材料MCM-41进行表面修饰,采用扫描电子显电镜(SEM)、透射电镜(TEM)和X-射线衍射分析仪(XRD)等方法对样品进行表征.并研究了巯基化MCM-41对水中Hg(Ⅱ)的吸附性能,考察了初始浓度、接触时间、温度、pH值和氯离子对吸附性能的影响.结果表明:Hg(Ⅱ)在巯基化MCM-41上的吸附符合假二级动力学模型,吸附等温线符合Langmuir模型;温度升高有利于巯基化MCM-41对Hg(Ⅱ)的吸附,温度为298和308 K时的饱和吸附容量分别为219和258 mg/g,吸附为吸热过程;溶液pH(2.0~7.6)基本不影响Hg(Ⅱ)的吸附,巯基化MCM-41对Hg(Ⅱ)的吸附随氯离子浓度的增加而降低.脱附实验表明,Hg(Ⅱ)在巯基化MCM-41上结合力较强.
Abstract:
MCM-41 was modified by 3-mercaptopropyltrimethoxysilane to remove Hg(Ⅱ)from aqueous solution. The thiol-functionalized MCM-41 obtained was characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM)and X-ray diffraction(XRD). In addition, the influences of the initial solution concentration, contact time, temperature, pH and concentration of chloride ion on the adsorption ability of thiol-functionalized MCM-41 for Hg(Ⅱ)in water were investigated. The results show that the adsorption of Hg(Ⅱ)by thiol-functionalized MCM-41 accords with the pseudo-second-order kinetic model and the adsorption isotherm can be fitted well by the Langmuir model. The increase of temperature benefits the adsorption of Hg(Ⅱ)by thiol-functionalized MCM-41, indicating that the adsorption is endothermic. The maximum adsorption capacities are 219 and 258 mg/g at the temperatures of 298 and 308 K respectively. The solution pH(2.0 to 7.6)has no significant effect on the adsorption of Hg(Ⅱ)by thiol-functionalized MCM-41. However, the adsorption capacity decreases with the increase in the chloride ion concentration. Finally, the results of desorption experiments show that the thiol-functionalized MCM-41 has a relatively high affinity to Hg(Ⅱ).

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备注/Memo

备注/Memo:
作者简介: 秦庆东(1980—),男,博士,讲师,qinqingdong@seu.edu.cn.
基金项目: 教育部知识创新工程重大项目培育基金资助项目(705013)、江苏省自然科学基金资助项目(BK20130626).
引文格式: 秦庆东,陈志真,傅大放,等.巯基化MCM-41对水中Hg(Ⅱ)的吸附[J].东南大学学报:自然科学版,2013,43(5):1011-1016. [doi:10.3969/j.issn.1001-0505.2013.05.019]
更新日期/Last Update: 2013-09-20