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题名: Preparation of a ceramic membrane from prevalent natural clay for the purification of phosphate wastewater
作者: Fan, Baomin1; Wei, Gang2; Hao, Hua3; Guo, Anru4; Li, Jie4
关键词: Natural clay ; Ceramic membrane ; Phosphate wastewater ; Concentration polarization ; Membrane fouling
刊名: DESALINATION AND WATER TREATMENT
发表日期: 2016
卷: 57, 期:37, 页:17308-17321
收录类别: SCI
英文摘要: A ceramic membrane was prepared on SiO2 support through suspended powder technology from cost-effective natural clay. The sintering temperature was selected at 600 degrees C according to thermogravimetric analysis of the raw powder. Results of Fourier transform infrared spectroscopy and X-ray fluorescence (XRF) showed the natural clay had high physicochemical similarity to phyllosilicate. Crystal structure, pore size distribution, and effective membrane thickness of the natural clay membrane (NCM) were also studied. X-ray diffraction patterns revealed a phase conversion occurs during sintering. The results of mercury porosimetry showed the pore size distribution of NCM ranged from 3 to 10 nm. Scanning electron microscopy images showed NCM distributed uniformly on the support with an approximate thickness of 30 mu m. The transport and separation performances of NCM were tested in batch mode through a stirred cell under dead-end mode. It was found that retention of PO43- was pH-dependent with the satisfactory rejection rate under alkaline conditions (pH > 10). The analysis of XRF made it reasonable to assume that amphoteric Al2O3 in the raw material should be responsible for the effective retention through electrical-related interactions. In addition, both increasing temperature and applying turbulence affected the retention positively. Filtration resistance analysis of treating phosphate solutions indicated that irreversible fouling could be completely neglected, and concentration polarization was the main cause of reversible fouling.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35541
Appears in Collections:其它_期刊论文

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作者单位: 1.Beijing Technol & Business Univ, Dept Mat Sci & Engn, Beijing 100048, Peoples R China
2.Beijing Univ Chem Technol, Beijing Key Lab Electrochem Proc & Technol Mat, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
4.China Aerosp Sci & Technol Corp, Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China
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