Fe-Ti oxide nano-adsorbent synthesized by co-precipitation for fluoride removal from drinking water and its adsorption mechanism
Fe-Ti oxide nano-adsorbent synthesized by co-precipitation for fluoride removal from drinking water and its adsorption mechanism
复制标题
共沉淀法合成的铁钛氧化物纳米吸附剂用于饮用水除氟及其吸附机理
DOI：
10.1016/j.powtec.2011.11.030
复制
发表时间：
2012-09-01
影响因子：
5.2
通讯作者：
Jin, Yong
中科院分区：
文献类型：
--
作者：
Chen, Lin;He, Bo-Yang;Jin, Yong
采用氨水滴定法，在室温下通过硫酸亚铁和硫酸钛溶液的共沉淀制备了一种新型的氧化铁吸附剂。研究了制备过程中的洗涤干燥方法、Fe/Ti摩尔比、煅烧温度等对产物形貌、晶化、表面结构和吸附容量的影响。优化后的Fe-Ti吸附剂的Langmuir吸附容量为47.0 mg/g，远高于纯Fe氧化物和纯Ti氧化物吸附剂的吸附容量。Fe和Ti之间存在协同作用，吸附剂表面的Fe-O-Ti键和羟基提供吸附活性中心，氟化物吸附形成Fe-O-Ti-F键。新型铁钛吸附剂是一种经济有效的饮用水除氟剂。皇冠版权所有（C）2011由Elsevier B. V.出版。保留所有权利。
A novel bimetallic oxide adsorbent was synthesized by the co-precipitation of Fe(II) and Ti(IV) sulfate solution using ammonia titration at room temperature. The influences of the washing and drying methods, Fe/Ti molar ratio, and calcination temperature used in the preparation on the morphology, crystallization, surface structure and adsorption capacity were investigated. An optimized Fe-Ti adsorbent had a Langmuir adsorption capacity of 47.0 mg/g, which was much higher than that of either a pure Fe oxide or Ti oxide adsorbent. There was a synergistic interaction between Fe and Ti in which Fe-O-Ti bonds on the adsorbent surface and hydroxyl groups provide the active sites for adsorption, and Fe-O-Ti-F bonds were formed by fluoride adsorption. The novel Fe-Ti adsorbent is efficient and economical for fluoride removal from drinking water. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.