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    Boron removal from RO permeate of geothermal water by monodisperse poly(vinylbenzyl chloride-co-divinylbenzene) beads containing N-methyl-d-glucamine
    (Elsevier B.V., 2015) Samatya, Saba; Tuncel, S. Ali; Kabay, Nalan
    Novel 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 4.8-5.4. 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. © 2014 Elsevier B.V.
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    Utilization of geothermal water as irrigation water after boron removal by monodisperse nanoporous polymers containing NMDG in sorption-ultrafiltration hybrid process
    (Elsevier, 2015) Samatya, Saba; Köseoğlu, Pelin; Kabay, Nalan; Tuncel, Ali; Yüksel, Mithat
    A relatively new method of polymerization, 'modified seeded polymerization' has been used for the synthesis of monodisperse nanoporous poly(glycidyl methacrylate-co-ethylene dimethacrylate) and poly(vinylbenzyl chloride-co-divinylbenzene) beads. The synthesized polymer beads were then functionalized with N-methyl-D-glucamine (NMDG) to obtain boron selective resins. The efficiency of these particles for boron removal from geothermal water was investigated by using the hybrid process coupling sorption with ultrafiltration (UF) method where a submerged hollow fiber type UF membrane module was employed for filtration. It was possible to reduce the boron concentration from 11.0. mg/L to ?. 1. mg/L in 20. min with hybrid method using poly(glycidyl methacrylate-co-ethylene dimethacrylate)-NMDG beads with 4. g-resin/L-geothermal water. The respective period for poly(vinylbenzyl chloride-co-divinylbenzene) beads with the same resin dosage was 30. min. In the case of commercially available boron selective ion exchange resin Dowex-XUS 43594.00 ground to an average particle size of 20. ?m, the target boron concentration which is ?. 1. mg/L was reached in 20. min by using 2. g-resin/L-geothermal water. © 2015 Elsevier B.V.