Adsorptive removal of fluoride by activated alumina doped cellulose acetate phthalate (CAP) mixed matrix membrane

Adsorption has been found to be significant in ultrafiltration by mixed matrix membrane. Removal of very low molecular weight solutes compared to the molecular weight cut off of the membrane is facilitated by adsorption. The modeling of the adsorption coupled with concentration polarization is presented based on the mathematical approach developed by Gekas et al. (Gekas et al. Chem Eng Sci. 1993;48:2753-2765, from the first principles. However, extensive modifications were included in theoretical development including those suggested by Ruiz-Bevia et al. (Ruiz-Bevia et al. Chem Eng Sci. 1997;52:2343-2352). The developed model captured the rejection dynamics with the help of retention factor. The model equations were solved under the framework of boundary layer analysis, using the integral approach. Effects of the adsorption isotherm and the different parameters affecting the system performance were also investigated. Further, experimental validation of the model results with two different mixed matrix ultrafiltration studies was also elucidated.

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“…For further information on the methodology of membrane fabrication, the suggested references are Refs. .…”

Section: Methodsmentioning

confidence: 99%

Adsorption‐concentration polarization model for ultrafiltration in mixed matrix membrane

et al. 2014

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“…It was observed that the maximum adsorption capacity of arsenate on the membrane was as high as 131.78 mg/g under experimental conditions. Chatterjee and De (2014) prepared MMMs from cellulose acetate phthalate (CAP) and activated granular alumina using phase inversion technique and used them for the separation of fluoride ion from water. It was observed that the permeability of the membrane was reduced from 3.0 × 10 −11 to 1.4 × 10 −11 m/Pa s as alumina concentration increased from 0 to 35 wt% for constant CAP concentration at 20 wt%.…”

Section: Polymeric Membranes For Membrane Adsorptionmentioning

confidence: 99%

Removal of heavy metals and pollutants by membrane adsorption techniques

2018

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Application of polymeric membranes for the adsorption of hazardous pollutants may lead to the development of next-generation reusable and portable water purification appliances. Membranes for membrane adsorption (MA) have the dual function of membrane filtration and adsorption to be very effective to remove trace amounts of pollutants such as cationic heavy metals, anionic phosphates and nitrates. In this review article, recent progresses in the development of MA membranes are surveyed. In addition, recent progresses in the development of advanced adsorbents such as nanoparticles are summarized, since they are potentially useful as fillers in the host membrane to enhance its performance. The future directions of R&D in this field are also shown in the conclusion section.

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“…The membrane permeability (L p ), porosity (ε m ), density (ρ m ) and thickness were found to be (1.6 ± 0.03) × 10 − 11 m/Pa·s, 0.52 ± 0.07, 700 ± 11 kg/m 3 and 0.9 mm, respectively. Details of the physical characteristics of the membrane such as molecular weight cutoff, contact angle, surface roughness and pores size, are presented elsewhere [3].…”

Section: Methodsmentioning

confidence: 99%

“…Typically, MMMs are prepared by doping inorganic filler into the base matrix, to impart the desired characteristics [1][2][3]. Several researchers have reported the use of MMM for the separation and purification of gas mixture [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of cross flow ultrafiltration by mixed matrix membrane: A case study on fluoride removal

Mondal

Chatterjee

2015

Desalination

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Adsorptive removal of fluoride by activated alumina doped cellulose acetate phthalate (CAP) mixed matrix membrane

Cited by 101 publications

References 40 publications

Adsorption‐concentration polarization model for ultrafiltration in mixed matrix membrane

Adsorption‐concentration polarization model for ultrafiltration in mixed matrix membrane

Removal of heavy metals and pollutants by membrane adsorption techniques

Theoretical investigation of cross flow ultrafiltration by mixed matrix membrane: A case study on fluoride removal

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