Dechlorination of hexachlorobenzene using ultrafine Ca-Fe composite oxides

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Dechlorination of hexachlorobenzene using ultrafine Ca-Fe composite oxides
	Ma, XD; Zheng, MH; Liu, WB; Qian, Y; Zhang, B; Liu, WX
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2005
卷号	127 期号:2015-01-03 页码:156-162
关键词	dechlorination Ca-Fe composite oxides HCB co-precipitation
英文摘要	Ca-Fe composite oxides with different Ca/Fe atomic ratios were synthesized by co-precipitation method and characterized by X-ray diffraction (XRD), scanning electron microscopy with elemental X-ray analysis (SEM-EDX) and inductively coupled plasma optical emission spectrometer (ICP-OES). Their dechlorination activities were evaluated using hexachlorobenzene (HCB) as a model compound. The results indicate that the dechlorination activity is related to the composition of metal oxides. Different compositions lead to the formation of different phases of Ca-Fe composite oxides. When Ca/Fe atomic ratio was 3.4, the dechlorination activity reached 97%, which was the highest in the dechlorination of HCB at 300 degrees C for 0.5 h. This may be related to the formation of Ca2Fe2O5 phase and small agglomerate size of oxide crystal of about 1 mu m. The effect of reaction time on HCB dechlorination and the pathway of dechlorination were investigated using the Ca-Fe composite oxide with the highest activity. It was found that hydrodechlorination took place in the destruction of HCB, the dechlorination efficiency is almost 100% after 2 h reaction. After reaction, quantitative measurement of chloride ion and qualitative analysis of CaCO3 indicate besides hydrodechlorination, other degradation routes may be present. The mechanism of synergic dechlorination using Ca-Fe composite oxides was discussed. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Engineering ; Environmental Sciences & Ecology
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
WOS记录号	WOS:000233972900018
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23158]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Ma, XD,Zheng, MH,Liu, WB,et al. Dechlorination of hexachlorobenzene using ultrafine Ca-Fe composite oxides[J]. JOURNAL OF HAZARDOUS MATERIALS,2005,127(2015-01-03):156-162.
APA	Ma, XD,Zheng, MH,Liu, WB,Qian, Y,Zhang, B,&Liu, WX.(2005).Dechlorination of hexachlorobenzene using ultrafine Ca-Fe composite oxides.JOURNAL OF HAZARDOUS MATERIALS,127(2015-01-03),156-162.
MLA	Ma, XD,et al."Dechlorination of hexachlorobenzene using ultrafine Ca-Fe composite oxides".JOURNAL OF HAZARDOUS MATERIALS 127.2015-01-03(2005):156-162.