标题：Enhanced adsorption of aqueous perchlorate on quaternary ammonium chloride surfactant-modified activated carbon fibers作者：Tang, Dingding; Yang, Nuo; Yang, Yijia; Zhang, Xin; Xiao, Wei; Wang,Dihua; Mao, Xuhui; Alshawabkeh, Akram N.
来源出版物：DESALINATION AND WATER TREATMENT 卷：55 期：2 页：484-495 DOI：10.1080/19443994.2014.914445 出版年：JUL 10 2015
摘要：Perchlorate contamination of drinking water and groundwater is a worldwide concerned issue, and technologies are needed for the treatment of aqueous perchlorate. In this study, activated carbon fibers (ACFs) and quaternary ammonium chloride surfactant-modified ACFs were tested for perchlorate removal from aqueous solution. The ACFs modified by cetyltrimethyl ammonium chloride (CTAC) exhibited the best performance on perchlorate adsorption. Batch experiments were performed to investigate the equilibrium, thermodynamics, kinetics, and mechanism of perchlorate adsorption onto CTAC-ACFs. The results showed that the spontaneous perchlorate adsorption process followed the Langmuir isotherm and the pseudo-second-order kinetic model. Perchlorate adsorption onto CTAC-ACFs was enhanced as the initial perchlorate concentration, contact time, and solution temperature increased. Alkaline pH and higher ionic strength did not favor the adsorption of perchlorate. Ion exchange between the perchlorate and carried chloride was the major adsorption mechanism, but other adsorption processes (e.g. electrostatic attraction and physical adsorption) may also play important roles for the adsorption. The CTAC-ACF adsorbent showed a relatively high adsorption capacity of 26.74 mg/g (at an initial perchlorate concentration of 20 mg/L). Moreover, its well stability and regenerability enable it as a potential adsorbent material for the decontamination of aqueous perchlorate.
入藏号：WOS:000356364900021
文献类型：Article
语种：English
作者关键词：Perchlorate, Quaternary ammonium chloride surfactants, Adsorption, Active carbon fibers
扩展关键词：FERRIC HYDROXIDE GFH; DRINKING-WATER; IONIC-STRENGTH; REMOVAL; EQUILIBRIUM; KINETICS; DERIVATIVES; MECHANISM; CHITOSAN; OXIDES
通讯作者地址：Mao, Xuhui; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
电子邮件地址：13396064706@163.com; newyang214@126.com; 513000194@qq.com; gabrielxiao@whu.edu.cn; wangdh@whu.edu.cn; clab@whu.edu.cn; aalsha@neu.edu
地址：
[Tang, Dingding; Yang, Nuo; Yang, Yijia; Zhang, Xin; Xiao, Wei; Wang, Dihua; Mao, Xuhui] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.
[Alshawabkeh, Akram N.] Northeastern Univ, Civil & Environm Engn Dept, Boston, MA 02115 USA.
研究方向：Engineering; Water Resources
ISSN：1944-3994
eISSN: 1944-3986
