Effective arsenic removal using polyacrylonitrile-based ultrafiltration (UF) membrane

Lohokare, H. R.; Muthuramamoorthy, Muthumareeswaran; Agarwal, Gopal; Kharul, Ulhas K.

doi:10.1016/j.memsci.2008.03.068

Cited by 83 publications

(45 citation statements)

References 29 publications

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“…It was found that the content of danshensu and protocatechuic aldehyde in the permeate is different when PAN membranes with different hydrophilicities are employed for filtration. More recently, Lohokare et al [16] have reported that the hydrolysis of PAN-based UF membrane surface by NaOH leading to the formation of carboxylate groups and reduction in initial pore size rendered As-V rejection capability by Donnan exclusion principle. Obviously, modulating the structure of PAN membrane with alkaline hydrolysis is significant for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Single-side hydrolysis of hollow fiber polyacrylonitrile membrane by an interfacial hydrolysis of a solvent-impregnated membrane

Zhang

Xue

et al. 2010

Journal of Membrane Science

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a b s t r a c tIn this paper, a new method was proposed to improve the mechanical strength and flux of polyacrylonitrile (PAN)-based membrane by a single-side hydrolysis of hollow fiber PAN substrate membrane. A non-water miscible solvent of cyclohexane was firstly incorporated into membrane pores to form cyclohexane-impregnated hollow fiber PAN membrane by stepwise solvent replacement method. Alkaline aqueous solution was then fed into lumen side to introduce interfacial hydrolysis reaction on the inner surface of hollow fiber by using the cyclohexane/water phase interface. After the reaction, the cyclohexane incorporated was displaced by water to remain the pore pathway. The ATR-FTIR and EDX analyses confirmed that the alkaline hydrolysis did not occur in the membrane pores. SEM and AFM were also conducted to further understand the microtopographical changes on membrane surfaces. During the assembly of PAN-based polyelectrolyte pervaporation composite membranes, both flux and mechanical strength was highly improved by using single-side hydrolysis of PAN substrate membrane while the selectivity was still kept at a relatively high level.

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Section: Introductionmentioning

confidence: 99%

Single-side hydrolysis of hollow fiber polyacrylonitrile membrane by an interfacial hydrolysis of a solvent-impregnated membrane

Zhang

Xue

et al. 2010

Journal of Membrane Science

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“…Available technologies include membrane separation, coagulation/precipitation, ion exchange, and adsorption [3][4][5][6][7]. While the technologies available in the market can remove arsenic to below 10 lg/L under optimal conditions, most of the systems suffer from one or more drawbacks and limitations.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of zirconium-based magnetic sorbent for arsenate removal

Zheng

Lim

Chen

2009

Journal of Colloid and Interface Science

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“…In order to prevent concentration polarization, the feed was recirculated by the pump and permeate was gathered from inside. The rejection of solutes (R) is calculated by equation below: (4) In this equation, C p and C f are concentrations of solute in permeate and feed, respectively.…”

Section: Membrane Filtration Experimentsmentioning

confidence: 99%

“…Because of its high degree of solvent resistance and good chemical and thermal stability, polyacrylonitrile has been successfully used in preparation of microfiltration and ultrafiltration membranes [4][5][6]. Moreover, because of its relatively active surface, chemical modification of PAN membrane can be easily done [7,8].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of PAN hollow fiber membrane by chemical reaction

2015

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In this study, a new method was applied to achieve an efficient surface modification of Polyacrylonitrile (PAN) hollow fiber membrane. The surface modification dealt by immersion of PAN hollow fibers in hydroxylamine solution under various conditions (different solution concentrations and reaction time). The nitrile groups on the surface of the membrane were changed to form the amidoxime (-C(NH 2 )=N-OH) groups. The surface modified membranes were assessed by pure water permeation test and the rejection of high molecular weight materials like Polyvinylalcohol (PVA) from water. Permeation test results showed that with increasing hydroxylamine concentration, the amount of water permeation reduces slowly, while the PVA-30 kDa rejection has been somewhat increased after surface modification. FTIR/ATR analysis confirms the presence of amidoxime groups on the membrane surface. Also, the water contact angel was decreased from 64 to 34 after reaction. The ability of silver ions absorption was also assessed for modified membrane. Finally, the antifouling property of the modified hollow fibers was assessed by milk solution ultrafiltration. The obtained results showed that the modified hollow fibers present better antifouling properties.

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Effective arsenic removal using polyacrylonitrile-based ultrafiltration (UF) membrane

Cited by 83 publications

References 29 publications

Single-side hydrolysis of hollow fiber polyacrylonitrile membrane by an interfacial hydrolysis of a solvent-impregnated membrane

Single-side hydrolysis of hollow fiber polyacrylonitrile membrane by an interfacial hydrolysis of a solvent-impregnated membrane

Preparation and characterization of zirconium-based magnetic sorbent for arsenate removal

Surface modification of PAN hollow fiber membrane by chemical reaction

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