[1]赵子龙,傅大放.阴-阳离子改性凹凸棒石对水溶液中双酚A的吸附机制[J].东南大学学报(自然科学版),2012,42(5):921-927.[doi:10.3969/j.issn.1001-0505.2012.05.023]
 Zhao Zilong,Fu Dafang.Adsorption mechanism of bisphenol A in aqueous solution using anionic-cationic surfactant modified attapulgite[J].Journal of Southeast University (Natural Science Edition),2012,42(5):921-927.[doi:10.3969/j.issn.1001-0505.2012.05.023]
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阴-阳离子改性凹凸棒石对水溶液中双酚A的吸附机制()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第5期
页码:
921-927
栏目:
环境科学与工程
出版日期:
2012-09-20

文章信息/Info

Title:
Adsorption mechanism of bisphenol A in aqueous solution using anionic-cationic surfactant modified attapulgite
作者:
赵子龙 傅大放
东南大学土木工程学院,南京 210096
Author(s):
Zhao Zilong Fu Dafang
School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
阴-阳离子改性凹凸棒石 超声 双酚A 吸附机制
Keywords:
anionic-cationic surfactant modified attapulgite ultrasonic treatment bisphenol A adsorption mechanism
分类号:
X703
DOI:
10.3969/j.issn.1001-0505.2012.05.023
摘要:
以阴、阳离子表面活性剂十二烷基硫酸钠(SDS)和十六烷基三甲基溴化铵(HDTMAB)为改性剂, 超声制备了阴-阳离子改性凹凸棒石.采用静态吸附法研究了双酚A在阴-阳离子改性凹凸棒石上的吸附特性以及动力学和热力学过程,并分析了其可能的吸附机理.结果表明:在所研究的配比范围内,阴、阳离子表面活性剂未产生协同增溶作用; 双酚A在阴-阳离子改性凹凸棒石上的吸附符合准二级动力学方程,其吸附速率受边界层扩散和颗粒内扩散共同控制; Langmuir等温吸附方程能较好地描述吸附等温线,表面吸附作用在吸附过程中占主导地位; 吸附过程为熵减自发放热过程,以物理吸附为主,表现为氢键力、范德华力、疏水作用力和偶极间作用力等多种作用力的协同作用.
Abstract:
Using anionic surfactant sodium dodecyl sulfate(SDS)and cationic surfactant hexadecyl trimethylammonium bromide(HDTMAB)as modifiers, the adsorbent of attapulgite supported anionic-cationic surfactant was prepared through ultrasonic treatment. The adsorption characteristics, thermodynamics and kinetics of the adsorption of bisphenol A(BPA)in aqueous solution were studied by using static experiments, and the possible adsorption mechanism was proposed. The results show that there is no significant synergism for the mixed surfactants within the experimental ratio range. The adsorption kinetics of BPA on the adsorbent are in agreement with the pseudo-second-order rate equation, and the adsorption rate was controlled by intra-particle diffusion and extra-particle diffusion. Meanwhile, the adsorption isotherms can be described by using the Langmuir isotherm model, and surface adsorption plays a leading role in the process of BPA adsorption into organic-attapulgite. The adsorption accompanied by a decrease in entropy is a spontaneous and exothermic process, mainly dominated by the physical interaction which is expressed as the collaborative effects of hydrogen bond forces, van der Waals forces, hydrophobic bond forces and dipole bond forces an so on.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 赵子龙(1985—),男,博士生; 傅大放(联系人),男,博士,教授,博士生导师,fdf@seu.edu.cn.
基金项目: 教育部博士点基金资助项目(20100092120018)、江苏省高校优势学科建设工程资助项目(1105007001).
引文格式: 赵子龙,傅大放.阴-阳离子改性凹凸棒石对水溶液中双酚A的吸附机制[J].东南大学学报:自然科学版,2012,42(5):921-927. [doi:10.3969/j.issn.1001-0505.2012.05.023]
更新日期/Last Update: 2012-09-20