Activated carbon/iron oxide composites for the removal of atrazine from aqueous medium
Activated carbon/iron oxide composites for the removal of atrazine from aqueous medium
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DOI：
10.1016/j.jhazmat.2008.08.066
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发表时间：
2009-05-30
影响因子：
13.6
通讯作者：
Anastacio, Alexandre S.
中科院分区：
文献类型：
--
作者：
Castro, Cinthia S.;Guerreiro, Mario C.;Anastacio, Alexandre S.
将活性炭的吸附特性和铁氧化物的氧化特性结合在一起，制备了一种去除水中阿特拉津的新型材料。制备了质量比为1/1和5/1的活性炭/氧化铁复合材料，并采用粉末X射线衍射（XRD）、红外光谱（FTIR）、扫描电子显微镜（SEM）和氮吸附测试等手段对复合材料进行了表征。在批实验中的吸附和氧化过程进行了评估，以监测这些复合材料的阿特拉津去除能力。复合材料中实际存在的主要氧化铁是针铁矿（α-FeOOH）。用氧化铁浸渍通过其在活性炭孔中的沉积降低了表面积。然而，较高的铁浓度促进较高的氧化速率，表明氧化反应的效率与铁含量有关，而不是通过吸附过程在碳表面上的污染物的预浓缩。(c)2008 Elsevier B. V.保留所有权利。
The adsorption features of activated carbon and the oxidation properties of iron oxides were combined in a composite to produce new materials for atrazine removal from aqueous medium. Activated carbon/iron oxide composites were prepared at 1/1 and 5/1 mass ratios and characterized with powder X-ray diffractometry (XRD), infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and nitrogen adsorption measurements. The adsorption and oxidation processes were evaluated in batch experiments, in order to monitor the atrazine removal capacity of these composites. The main iron oxide actually present in the composites was goethite (alpha-FeOOH). Impregnation with iron oxide reduced the surface area by its deposition in the activated carbon pores. However, a higher iron concentration promoted a higher oxidation rate, indicating that the efficiency of the oxidation reaction is related with the iron content and not with the pre-concentration of the contaminant on the carbon surface through adsorption process. (c) 2008 Elsevier B.V. All rights reserved.