title: Matrix supported tailored polymer for solid phase extraction of fluoride from variety of aqueous streams.
abstract: Fluoride related health hazards (fluorosis) are a major environmental problem in many regions of the world. It affects teeth; skeleton and its accumulation over a long period can lead to changes in the DNA structure. It is thus absolutely essential to bring down the fluoride levels to acceptable limits. Here, we present a new inorganic-organic hybrid polymer sorbent having tailored fixed-sites for fluoride sorption. The matrix supported poly (bis[2-(methacryloyloxy)-ethyl]phosphate) was prepared by photo-initiator induced graft-polymerization in fibrous and microporous (sheet) host poly(propylene) substrates. These substrates were conditioned for selective fluoride sorption by forming thorium complex with phosphate groups on bis[2-methacryloyloxy)-ethyl] phosphate (MEP). These tailored sorbents were studied for their selectivity towards fluoride in aqueous media having different chemical conditions. The fibrous sorbent was found to take up fluoride with a faster rate (15 min for ≈76% sorption) than the sheet sorbent. But, the fluoride loading capacity of sheet sorbent (4,320 mg kg(-1)), was higher than fibrous and any other sorbent reported in the literature so far. The sorbent developed in the present work was found to be reusable after desorption of fluoride using NaOH solution. It was tested for solid phase extraction of fluoride from natural water samples.
authors.affiliation: Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
authors.forename: Neha
authors.initials: N
authors.lastname: Thakur
authors.forename: Sanjukta A
authors.initials: SA
authors.lastname: Kumar
authors.forename: D N
authors.initials: DN
authors.lastname: Wagh
authors.forename: Sadananda
authors.initials: S
authors.lastname: Das
authors.forename: Ashok K
authors.initials: AK
authors.lastname: Pandey
authors.forename: Sangita D
authors.initials: SD
authors.lastname: Kumar
authors.forename: A V R
authors.initials: AV
authors.lastname: Reddy
mesh_terms: D000327:Adsorption; D060766:Drinking Water / Q000592:standards; D005459:Fluorides / Q000302:isolation & purification*; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010755:Organophosphates / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D011126:Polypropylenes / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D012996:Solutions; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D060766:Drinking Water; D008689:Methacrylates; D010755:Organophosphates; D009943:Organophosphorus Compounds; D011109:Polymethacrylic Acids; D011126:Polypropylenes; D012996:Solutions; D014874:Water Pollutants, Chemical; C097098:di(2-methacryloyloxyethyl)phosphate; D005459:Fluorides