BORON REMOVAL FROM GEOTHERMAL WATER BY A NOVEL MONODISPERSE POROUS POLY(GMA-co-EDM) RESIN CONTAINING N-METHYL-D-GLUCAMINE FUNCTIONAL GROUP

WOS: 000307240300003Boron removal from geothermal water and its reverse osmosis (RO) permeate was examined by a novel synthesized monodisperse porous poly(GMA-co-EDM) resin containing N-methyl-D-glucamine. The optimum resin concentration was found to be 4 g L-1 and the kinetic data were found to follow a pseudo-second-order kinetic model. According to the correlation coefficients for diffusional kinetic, the rate controlling step was particle diffusion.BORENMinistry of Energy & Natural Resources - Turkey [2008-G-0192]; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)This work was supported financially by BOREN (Project Number: 2008-G-0192). We are grateful to TUBITAK for post-doctoral fellowship for S. Samatya. We would like to thank Izmir Geothermal Energy Company, Izmir, Turkey for geothermal water samples. We also thank Prof. A. Ozdural, Hacettepe University, for using ICP equipment for boron analysis

Boron Removal from Geothermal Water by a Novel Monodisperse Porous Poly(GMA-co-EDM) Resin Containing N-Methyl-D-Glucamine Functional Group

Boron removal from geothermal water and its reverse osmosis (RO) permeate was examined by a novel synthesized monodisperse porous poly(GMA-co-EDM) resin containing N-methyl-D-glucamine. The optimum resin concentration was found to be 4 g L -1 and the kinetic data were found to follow a pseudo-second-order kinetic model. According to the correlation coefficients for diffusional kinetic, the rate controlling step was particle diffusion. © 2012 Copyright Taylor and Francis Group, LLC.2008-G-0192This work was supported financially by BOREN (Project Number: 2008-G-0192). We are grateful to TUBITAK for post-doctoral fellowship for S. Samatya. We would like to thank Izmir Geothermal Energy Company, Izmir, Turkey for geothermal water samples. We also thank Prof. A. Ozdural, Hacettepe University, for using ICP equipment for boron analysis. -

Boron removal from RO permeate of geothermal water by monodisperse poly(vinylbenzyl chloride-co-divinylbenzene) beads containing N-methyl-D-glucamine

WOS: 000353094300009Novel boron selective chelating resins were synthesized using monodisperse porous poly(VBC-co-DVB) beads by further functionalization with N-methyl-D-glucamine (NMDG) groups. The performance of the resins for boron removal from geothermal water and its reverse osmosis (RO) permeate has been studied using a batch sorption method. It was possible to remove about 93% of boron from geothermal water containing 11.0 mg B/L with 4 g/L of monodisperse functionalized polymer beads. The respective value for RO permeate of geothermal water with 4.8-5A mg B/L of concentration was 97% with the same amount of chelating resin. The sorption rate of boron was quite rapid. A sorption equilibrium was reached in 20 min for geothermal water and in 10 min for RO permeate. The kinetic data obtained were evaluated using classical kinetic models and diffusion/reaction models. It was concluded that monodisperse chelating resins obeyed pseudo-second order kinetic model. Also, the rate controlling step of boron sorption was mostly particle diffusion along with chemical reaction. (C) 2014 Elsevier B.V. All rights reserved.National Boron Research Institute, BORENMinistry of Energy & Natural Resources - Turkey [2008-G-0192]; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)This work was supported financially by the National Boron Research Institute, BOREN (Project Number: 2008-G-0192). We are grateful also to TUBITAK for the post-doc fellowship to Dr. S. Samatya. We thank Prof. Dr. A. Ozdural for the kind permission to use ICP-MS in his laboratory for boron analyses

Removal of fluoride from water by metal ions (Al3+, La 3+ and ZrO2+) loaded natural zeolite

In this study, the ion exchange of metal ions (Al3+, La3+ and ZrO2+) on modified zeolites was carried out using batch method. Fluoride removal from water using Al3+-, La3+- and ZrO2+- exchanged zeolite was subsequently investigated to evaluate the fluoride sorption characteristics of the sorbents. Natural zeolite samples (45m) were pre-conditioned with HNO3 solution (ZEO-1), NaNO3 solution (ZEO-2), and deionized water (ZEO-3) before loading Al3+, La3+, and ZrO2+ on zeolite. ZEO-1 type zeolite had a higher capacity than ZEO-2 and ZEO-3 type zeolites. Metal exchange capacities are 0.233, 0.089, 0.090mmol/g for ZrO2+-, La3+-, and Al3+- exchanged zeolite (ZEO-1), respectively. Equilibrium isotherms fitted well to Langmuir and Freundlich models. Percent removal of fluoride from aqueous solution containing 2.5mg F/L was 94% using metal loaded zeolite (ZEO-1 type) at an adsorbent concentration of 6.00g/L.Firat University Scientific Research Projects Management Unit: 2004-FEN-070This study was supported by Ege University Scientific Research Projects Commission (Project Number: 2004-FEN-070). We acknowledge Profs. E. Henden and A. C¸ elik for discussions. We also thank M. Akc¸ay for his kind help for the metal ions analyses by AAS. We thank Assoc. Prof. M. Kitis for providing us with a tap water sample. -

Comparative boron removal performance of monodisperse-porous particles with molecular brushes via " click chemistry" and direct coupling

A new sorbent based on micron-size, monodisperse-porous particles is proposed for boron removal by a hybrid process involving " adsorption" and " membrane separation" In the synthesis of sorbent, a multi-stage polymerization protocol involving the production of monodisperse polymer particles and the generation of dextran based molecular brushes on the particles via " click chemistry" was followed. The monodisperse porous poly(glycidyl methacrylate-co-ethylene dimethacrylate), poly(GMA-co-EDM), particles 6µm in size were obtained by " modified seeded polymerization" Dextran was attached onto the particles via " click chemistry" In this derivatization, the azide groups were obtained on the particles by the reaction between NaN3 and the epoxypropyl functionality. An alkyne carrying ligand, propiolic acid was covalently linked to the dextran via activation with a water soluble carbodiimide. The molecular brushes on the particle surface were then obtained by clicking alkyne modified-dextran onto the azide functionalized particles. A second sorbent was synthesized by the direct covalent attachment of dextran onto the poly(GMA-co-EDM), particles. Boron sorption capacities of both sorbents were investigated using model boron solutions and compared with the commercial resins. Monodisperse-porous particles with dextran based molecular brushes can be used for boron-removal from water. © 2010 Elsevier B.V.2008-G-0192This work was supported financially by BOREN (Project Number: 2008-G-0192). We are grateful to TUBITAK for post doc fellowship for S. Samatya. -

Removal of nitrate from ground water by a hybrid process combining electrodialysis and ion exchange processes

WOS: 000249655400005In regions where agricultural activities are highly intensive, nitrate concentrations in ground water are usually above the permissible level for nitrate in drinking water. There are several physicochemical and biological treatment processes typically used to remove nitrate contamination from ground water. In this study, an electrodialysision exchange hybrid process was used for the removal of nitrate from ground water obtained from an agricultural area in the Western Anatolia religion in Turkey. Nitrate was effectively removed from the ground water. The effect of other ionic species such as chloride and sulfates on nitrate removal by electrodialysis has also been studied using deionized water that was dosed with selected anionic and cationic species