Removal of boron from geothermal water by a novel boron selective resin

WOS: 000316040000016In this study, a novel chelating resin poly(N-(4-vinylbenzyl)-N-methyl-o-glucamine) (P(VbNMDG)) was synthesized. The sorption performance of this resin was compared with boron selective commercial resin Diaion CRB02 containing N-methyl-n-glucamine (NMDG) groups for boron removal from geothermal water. The P(VbNMDG) resin gave a higher sorption capacity and faster kinetics than that of Diaion CRB02 for boron removal from geothermal water. The kinetic data obtained were evaluated using classical kinetic models and diffusion/reaction models. It was concluded that both P(VbNMDG) and Diaion CRB02 resins obeyed pseudo second order kinetic model. Also, the rate controlling step of boron sorption was particle diffusion for both resins. The breakthrough profile of P(VbNMDG) resin for boron was sharper than that of Diaion CRB02. Thus, the degree of the column utilization of P(VbNMDG) resin was also high. The boron loaded on both resins was eluted using 5% H2SO4 solution with a percentage of around 80%. (C) 2012 Elsevier B.V. All rights reserved.7FP-MC Actions Grant CHILTURPOL2 (PIRSES-GA) [269153]; FONDECYTComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT [1110079]; PIA [ACT-130]The authors thank 7FP-MC Actions Grant CHILTURPOL2 (PIRSES-GA-2009 Project, grant number: 269153) for a fellowship to Dr. P. Santander to do research at Ege University, Turkey. We acknowledge FONDECYT (grant no. 1110079) and PIA (ACT-130) for the financial support. We are also grateful to Mitsubishi Chemical, Japan for Diaion CRB02 resin and Izmir Geothermal Co. for geothermal water samples