Dextran-graft-poly(hydroxyethyl methacrylate) gels: a new biosorbent for fluoride removal of water

Abstract

Synthesis of dextran-graft-poly(hydroxyethyl methacrylate) gels as a new fluoride biosorbent was considered in this work. For this propose, the Taguchi experimental design method was used for optimizing the synthetic conditions of the gels to reach high level of fluoride absorbency. The effects of three main parameters including concentrations of monomer (hydroxyethyl methacrylate), crosslinking agent (ethylene glycol dimethacrylate), and initiator (ammonium persulfate) on the final properties of the prepared gels were investigated. The proposed mechanism for grafting and chemically crosslinking reactions was proved with equilibrium water absorption, Fourier-transformed infrared, scanning electron microscopy, and thermogravimetric analysis. Under the optimized synthetic conditions, the maximum fluoride adsorption capacity in distilled water was found to be 8312 (mg fluoride/kg dried gel). As well, the loading of prepared gels with silver nanoparticles has been considered to achieve antibacterial activity. The silver nanoparticles loaded gels showed strong antibacterial activity against Gram-negative Escherichia coli bacterium. Therefore, these new gels can be considered as a potential candidate to develop an efficient antibacterial fluoride biosorbent for water treatment applications.

Synthesis and Characterization of Chitosan Based Multilayer and pH Sensitive Co-Polymeric System for the Targeted Delivery of 5-Fluorouracil, an In Vitro Study

“…This peak together with the -CH 3 stretching peak around 2787 cm À1 confirmed the grafting of these monomers. The disappearance of characteristic peak of vinyl monomers stressed the effectiveness of grafting process [31]. The broad band at 3377 cm À1 in CT-Na 3-Cit-CAc shifted to 3038 cm À1 indicates that the grafting takes place at -OH group.…”

Spectral and thermal investigation of designed terpolymers bearing p-acetylpyridine oxime moieties having excellent antimicrobial properties

“…IR (KBr, cm À1 ): υ = 3413 and 3425 (oxime > NOH), 3021(C-H stretching of acetyloxime group), 1516 and 1417 (aromatic C=C stretching) and 931 (N-O stretching). 1…”

“…The use of functional terpolymers in all sphere of life has increased abundantly increased in recent years because of their large applications like packaging, adhesives and coatings in electrical sensor, electroluminescent devices, hardener for epoxy resin, ion exchangers, thermal stable, and antimicrobial materials. [1][2][3][4][5][6][7][8][9] Singru and co-workers [10] studied the electrical property, thermal stability, morphology, photoluminescence, and ion-exchange properties of p-cresol-formaldehyde-melamine terpolymers resin. A polyacrlonitile (PAN) has been prepared with amidoxime-nitrile-3 hydroxyphenyl-1,2,4-oxadiazole (ANHOT) as pendant group has been prepared.…”

Synthesis and characterization of poly(m-aminophenol)-succinat

“…Cross-linking process has extremely significance for technological applications. [25][26][27][28] This process provides good mechanical and physical properties. Also, the cross-linked PANI derivatives can be gelled in organic solvents.…”