Boron removal from aqueous solutions by a polyethylenimine-epichlorohydrin resin

Journal of the Serbian Chemical Society

Sarri Sofia¹  Zamboulis Dimitrios¹  Misaelides Panagiotis¹  Warchoł Jolanta² 

[1] Aristotle University of Thessaloniki, Department of Chemistry, Thessaloniki, Greece;Rzeszow University of Technology, Department of Water Purification and Protection, Rzeszow, Poland;

关键词: boron removal;    polyethylenimine-epichlorohydrin resin;    sorption equilibrium;    kinetics;    modeling;   

DOI  :  10.2298/JSC170704114S

来源: DOAJ

【 摘 要 】

The use of a polyethylenimine–epichlorohydrin resin for the boron removal from aqueous solutions (boron concentration: 100–5000 mg L-1) of non-adjusted and pre-adjusted pH (pHnat, pHinit 8.0, 9.0 and 10.0) aqueous solutions was investigated using a batch technique. The boron concentration in the solutions after sorption was determined photometrically. The results indicated that the pH-dependent boron uptake was related to the protonation/deprotonation of the surface functional groups of the resin and to the boron speciation in solutions of different pH values. The maximum boron sorption capacity observed in solutions of pH 9.0 was 55 mg g-1 exceeding the majority of other commercial or alternative sorbents. Five empirical adsorption equations (Freundlich, Langmuir, Redlich–Peterson, Langmuir–Freundlich and Toth) were applied to the modelling of the boron adsorption equilibrium. The modelling results identified the homogenous boron sorption from acidic and heterogeneous from alkaline solutions. At alkaline pH, the system non-ideality can originate either from the different binding mechanism or from the competitive sorption of different boron species. The homogenous type boron sorption from acidic solutions was further confirmed by kinetic studies

【 授权许可】

Unknown