Sorption materials for arsenic removal from water: A comparative study
Sorption materials for arsenic removal from water: A comparative study
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DOI：
10.1016/j.watres.2004.04.003
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发表时间：
2004-07-01
期刊：
影响因子：
12.8
通讯作者：
Weiss, H
中科院分区：
文献类型：
--
作者：
Daus, B;Wennrich, R;Weiss, H
平行测试了五种不同的吸附材料用于从水中去除砷：活性炭（AC）、负载锆的活性炭（Zr-AC）、具有商品名“Absorptionsmittel 3”（AM 3）的吸附介质、零价铁（Fe-0）和氢氧化铁颗粒（GIH）。进行了批试验和柱试验，并分别研究了两种无机形态（亚砷酸盐和砷酸盐）的行为。吸附动力学的顺序为Zr-AC> GIH = AM 3>Fe（0）AC。亚砷酸盐的顺序则不同（AC远大于Zr-AC = AM3 = GIH = Fe-0）。在厌氧批式实验中，发现活性炭能增强亚砷酸盐的氧化反应。吸附等温线的线性常数被确定为377，89和87锆AC，AM3和GIH，分别。从批实验中得到的吸附容量约为7克升（-1）的Zr-Ac和5克升（-1）的AM 3。柱试验表明，砷被完全去除。最好的结果是获得GIH，与砷酸盐不洗脱之前13 100孔体积（流入浓度1毫克l（-1）As），这对应于2.3毫克g（-1）或3.7克l（-1）的吸收能力。(C)2004爱思唯尔有限公司保留所有权利。
Five different sorption materials were tested in parallel for the removal of arsenic from water: activated carbon (AC), zirconium-loaded activated carbon (Zr-AC), a sorption medium with the trade name 'Absorptionsmittel 3' (AM3), zero-valent iron (Fe-0), and iron hydroxide granulates (GIH). Batch and column tests were carried out and the behavior of the two inorganic species (arsenite and arsenate) was investigated separately. The sorption kinetics of arsenate onto the materials followed the sequence Zr-ACmuch greater thanGIH=AM3>Fe(0)AC. A different sequence was obtained for arsenite (ACmuch greater thanZr-AC = AM3 = GIH = Fe-0). AC was found to enhance the oxidation reaction of arsenite in anaerobic batch experiments. The linear constants of the sorption isotherms were determined to be 377, 89 and 87 for Zr-AC, AM3 and GIH, respectively. The uptake capacities yielded from the batch experiment were about 7 g l(-1) for Zr-Ac and 5 g l(-1) for AM3.Column tests indicated that arsenite was completely removed. The best results were obtained with GIH, with the arsenate not eluting before 13 100 pore volumes (inflow concentration I mg l(-1) As) which corresponds to a uptake capacity of 2.3 mg g(-1) or 3.7 g l(-1). (C) 2004 Elsevier Ltd. All rights reserved.