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题名: Effect of aluminum speciation and pH on in-line coagulation/diatomite microfiltration process: Correlations between aggregate characteristics and membrane fouling
作者: Wang, Jiangting; Xu, Weiying; Xu, Jingjing; Wei, Dong; Feng, Hui; Xu, Zhenghe
刊名: JOURNAL OF MOLECULAR LIQUIDS
出版日期: 2016-12
卷号: 224, 期号:0, 页码:492-501
关键词: Diatomite Membrane ; Floc properties ; Aluminum species ; pH ; Membrane fouling
DOI: 10.1016/j.molliq.2016.10.015
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: Impacts of aluminum speciation and water pH on coagulation/diatomite microfiltration (DMM) process were investigated in this study. Three commonly used Al-based coagulants, aluminum sulfate (AS), poly-aluminum chloride (PACT), and Al-13 ([Al13O4(OH)(24)(H2O)(12)](7+)), were employed to explore the role of Al speciation. Floc characteristics, including particle size and fractal structure under different coagulants and water pH levels, were investigated using a laser diffraction particle sizing device. The results indicated that in the dosage range of 1.0-11.0 mg/L, coagulation/DMM could effectively remove particles (97-100%) and DOC (40-80%), and as pH increased from 3.0 to 10.0, its purification efficiency was higher and more stable than separate coagulation. AS contributed to large and loosely structured flocs and thus alleviated the flux declines most effectively, leading to a flux reduction of about 50%, while the reductions for PACT and A113 were 71% and 73%, respectively. Neutral pH was found most conducive to the hybrid process and alkaline pH (9.0) led to relatively larger flux than strong acidic pH (3.0), especially for AS coagulation system. As pH changed, Ain led to the least variation in flux declines while both the removal efficiency and filtration flux fluctuated most obviously for AS coagulation system. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36171
Appears in Collections:中国科学院饮用水科学与技术重点实验室_期刊论文

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Recommended Citation:
Wang, Jiangting,Xu, Weiying,Xu, Jingjing,et al. Effect of aluminum speciation and pH on in-line coagulation/diatomite microfiltration process: Correlations between aggregate characteristics and membrane fouling[J]. JOURNAL OF MOLECULAR LIQUIDS,2016,224(0):492-501.
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