Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides

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	Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides
	Chen, Aiyan; Zhao, Bingqing; Wang, Xingzu; Huang, Xinrui; Cheng, Xiang; Sun, Dezhi
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2009-09-30
卷号	169 期号:1 页码:958-964
关键词	Phosphate Adsorption Zn-al Layered Double Hydroxides Calcination Desorption And Regeneration Sewage Sludge Filtrate
英文摘要	A series of layered double hydroxides (LDHs) with different metal cations were synthesized to remove phosphate in waste sludge filtrate from a municipal wastewater treatment plant for phosphorus recovery and to help control eutrophication. The highest phosphate adsorption capacity was obtained by using Zn-Al-2-300, that is LDHs with Zn/Al molar ratio of 2 and calcined at 300 degrees C for 4 h. Circumneutral and mildly alkaline waters appeared suitable for the possible application of Zn-Al LDHs due to the amphoteric nature of aluminum hydroxide. Phosphate adsorption from the sludge filtrate by the LDHs followed pseudo-second-order kinetics, and the adsorption capacity at equilibrium was determined to be similar to 50 mg P/g. Adsorption isotherms showed that phosphate uptake in this study was an endothermic process and had a good fit with a Langmuir-type model. The absorbed phosphate can be effectively desorbed (more than 80%) from LDHs particles by a 5 wt% NaOH solution. The regeneration rate of used LDHs was similar to 60% after six cycles of adsorption-desorption-regeneration. (c) 2009 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000268967200133
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21768]
专题	生态环境研究中心_水污染控制实验室
推荐引用方式 GB/T 7714	Chen, Aiyan,Zhao, Bingqing,Wang, Xingzu,et al. Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,169(1):958-964.
APA	Chen, Aiyan,Zhao, Bingqing,Wang, Xingzu,Huang, Xinrui,Cheng, Xiang,&Sun, Dezhi.(2009).Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides.JOURNAL OF HAZARDOUS MATERIALS,169(1),958-964.
MLA	Chen, Aiyan,et al."Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides".JOURNAL OF HAZARDOUS MATERIALS 169.1(2009):958-964.