Bromate removal from water by granular ferric hydroxide (GFH)
Bromate removal from water by granular ferric hydroxide (GFH)
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DOI：
10.1016/j.jhazmat.2009.04.123
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发表时间：
2009-10-15
影响因子：
13.6
通讯作者：
Kang, Joon-Wun
中科院分区：
文献类型：
--
作者：
Bhatnagar, Amit;Choi, YangHun;Kang, Joon-Wun
研究了颗粒状氢氧化铁（GFH）去除水中溴酸盐的可行性。批实验进行了研究的各种实验参数的影响，如接触时间的效果，初始溴酸盐浓度，温度，pH值和竞争阴离子的效果对溴酸盐去除GFH。吸附动力学研究表明，溴酸盐的吸附速率在吸附开始时较快，在5 min内达到75%的吸附量，在20 min内达到平衡，吸附过程符合准二级动力学。在25 ℃时，GFH对溴酸盐的最大吸附能力为16.5 mg g（-1）。吸附数据符合Langmuir模型。结果表明，GFH吸附溴酸根的主要机理是离子交换。竞争性阴离子和溶液pH（3-9）的影响可以忽略不计。本研究的结果表明，GFH可以有效地用于饮用水中溴酸盐的去除。(C)2009爱思唯尔有限公司版权所有。
The feasibility of granular ferric hydroxide (GFH) for bromate removal from water has been studied. Batch experiments were performed to study the influence of various experimental parameters such as effect of contact time, initial bromate concentration, temperature, pH and effect of competing anions on bromate removal by GFH. The adsorption kinetics indicates that uptake rate of bromate was rapid at the beginning and 75% adsorption was completed in 5 min and equilibrium was achieved within 20 min. The sorption process was well described by pseudo-second-order kinetics. The maximum adsorption potential of GFH for bromate removal was 16.5 mg g(-1) at 25 degrees C. The adsorption data fitted well to the Langmuir model. The increase in OH peak and absence of Br-O bonding in MR spectra indicate that ion-exchange was the main mechanism during bromate sorption on GFH. The effects of competing anions and solution pHs (3-9) were negligible. Results of the present study suggest that GFH can be effectively utilized for bromate removal from drinking water. (C) 2009 Elsevier B.V. All rights reserved.