标题：Defluorination from aqueous solution by Ti(IV)-modified granular activated carbon作者：Tang, Dingding; Zhao, Yuwei; Wang, Yixin; Yang, Yijia; Li, Dongyang;Peng, Tianwei; Mao, Xuhui

来源出版物：DESALINATION AND WATER TREATMENT 卷：54 期：12 页：3432-3443 DOI: 10.1080/19443994.2014.910839 出版年：JUN 19 2015

摘要：Fluoride contamination of drinking water and groundwater is a worldwide concerned issue, and technologies are needed for the treatment of aqueous fluoride. In this study, Ti(IV) species-modified granular activated carbon (Ti(IV)-GAC) was prepared and tested for fluoride removal from aqueous solution. Batch experiments were performed to investigate the equilibrium, kinetics, and mechanism of fluoride adsorption onto the prepared Ti(IV)-GAC. The results showed that the spontaneous fluoride adsorption process followed the Langmuir isotherm model and the pseudo-second-order kinetic model. Fluoride adsorption onto the Ti(IV)-GAC was enhanced as the initial fluoride concentration and contact time increased. Alkaline pH and elevated solution temperature did not favor the adsorption of fluoride. Anion exchange between the fluoride ions and the hydroxyl groups of the adsorbents was the major adsorption mechanism. Both batch experiments and flowing column experiments demonstrated that the Ti(IV)-GAC adsorbent can effectively remove the aqueous fluoride with high efficiency, and bring down the fluoride concentration lower than the permissible limit of fluoride in drinking water in China (1.0 mg/L). Experiments also showed that the Ti(IV)-GAC material had favorable regenerability, and can be used as a versatile adsorbent for treating mixed contamination of fluorides and organic pollutants.

入藏号：WOS:000354942500025

文献类型：Article

语种：English

作者关键词：Ti(IV), Granular activated carbon, Adsorption, Defluorination

扩展关键词：FLUORIDE REMOVAL; DRINKING-WATER; WASTE-WATER; LOW-COST; DEFLUORIDATION; ADSORPTION; EQUILIBRIUM; SORPTION; IONS; ADSORBENT

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：clab@whu.edu.cn

地址：[Tang, Dingding; Zhao, Yuwei; Wang, Yixin; Yang, Yijia; Li, Dongyang; Peng, Tianwei; Mao, Xuhui]Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

研究方向：Engineering; Water Resources

ISSN：1944-3994

eISSN: 1944-3986