Experimental and modeling of fluoride removal using aluminum fumarate (AlFu) metal organic framework incorporated cellulose acetate phthalate mixed matrix membrane. Issue 6 (December 2017)

• Record Type: Journal Article
• Authors: Karmakar, Sankha; Bhattacharjee, Saikat; De, Sirshendu
• Is Part Of: Journal of environmental chemical engineering. Volume 5:Issue 6(2017)
• Page Start: 6087
• Page End: 6097
• Publication Date: 2017-12
• Subjects: Aluminum fumarate -- Mixed matrix membrane -- Adsorption -- Fluoride removal -- Metal organic framework; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2017.11.035
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Highlights: Maximum adsorption capacity of fluoride on M10 is 179 mg/g. The MMMs exhibited positive surface charge at pH 7. M10 membrane sustained upto 17 h with 0.026 m 2 area for 10 mg/l fluoride solution. The membranes can be fully regenerated at extreme alkaline environment. The MMMs with AlFu MOF exhibited high potency for fluoride removal. Abstract: Selective adsorption of small sized contaminant by inorganic component incorporated in a polymeric membrane in addition to separation of total solids, iron, alkalinity and hardness makes mixed matrix membrane (MMM) a unique filtration medium. Significant separation of tiny pollutants along with high throughput at low operating pressure is the remarkable feature of MMM. Aluminum fumarate metal oxide framework (MOF), a super adsorbent for fluoride was included in cellulose acetate phthalate as base polymer to prepare a novel MMM for removal of fluoride from contaminated groundwater. The membranes were characterized by porosity, permeability, molecular weight cut off and contact angle. The morphology and the surface roughness were studied by scanning electron and atomic force microscope. The adsorption capacity of the membranes for fluoride varied from 107 to 179 mg g −1 for MOF concentration of 2 to 10 wt%. The fluoride rejection was more than 99% for 10% AlFu concentration. The life of the membrane was determined using a continuous cross flow setup with membrane area of 0.01 m 2 and it was found to be 17 h for a feed concentration of 10 mg L −1 of fluoride in synthetic solution. Regeneration study and performance of the MMM in real life ground water samples were also investigated. The study provides a promising, scalable technology using MMM for fluoride mitigation by combining high throughput, selective separation of fluoride and general filtration including removal of total dissolved solids, hardness, alkalinity and iron.