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	Synthesis of sludge@carbon nanocomposite for the recovery of As (V) from wastewater
	El-Deen, S. E. A. Sharaf; Zhang, Fushen
	2012
会议名称	7th International Conference on Waste Management and Technology (ICWMT)
会议日期	SEP 05-07, 2012
会议地点	Beijing, PEOPLES R CHINA
关键词	Nanocomposite sewage sludge adsorption arsenic removal
英文摘要	A novel type of sludge@carbon nanocomposite was synthesized using municipal sewage sludge as raw material and ferrous iron sulphate as catalyst through hydrothermal carbonization (HTC) process. The prepared adsorbent was characterized by various analytical techniques as Scanning electron microscopy (SEM), transmission electron microscope (TEM) and X-ray diffraction patterns (XRD). The adsorption capacity of this nanocomposite for As(V) has been studied using a batch method. Various parameters affecting sorption such as pH, contact time and sorbate concentration were investigated and optimal experimental conditions were determined. It was found that 0.5 h was sufficient for complete removal of 0.5 mg/l As(V) from polluted water. The suitable adsorbent dosage and pH value were 3.6 g/l and 5.0, respectively. The arsenic desorbed could subsequently be separated by 0.5M NaOH solution. A modified linear driving force model conjugated with Langmuir isotherm was created to describe the adsorption kinetics. The resultant modified sewage sludge demonstrated a substantially high adsorption capacity of As(V) in comparison with dried sewage sludge and many other adsorbents reported in literature. The rates of adsorption were found to conform to the pseudo-second order kinetic model. The intra-particle diffusion was identified to be the rate-limiting step. The sludge@carbon nanocomposite could be reused after two adsorption-desorption cycles. (C) 2012 Selection and/or peer-review under responsibility of Basel Convention Coordinating Centre for Asia and the Pacific and National Center of Solid Waste Management, Ministry of Environmental Protection of China.
ISSN号	1878-0296
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24592]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	El-Deen, S. E. A. Sharaf,Zhang, Fushen. Synthesis of sludge@carbon nanocomposite for the recovery of As (V) from wastewater[C]. 见:7th International Conference on Waste Management and Technology (ICWMT). Beijing, PEOPLES R CHINA. SEP 05-07, 2012.

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