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Branched Polymeric Media: Boron-Chelating Resins from Hyperbranched Polyethylenimine

Mishra, Himanshu and Yu, Changjun and Chen, Dennis P. and Goddard, William A., III and Dalleska, Nathan F. and Hoffmann, Michael R. and Diallo, Mamadou S. (2012) Branched Polymeric Media: Boron-Chelating Resins from Hyperbranched Polyethylenimine. Environmental Science and Technology, 46 (16). pp. 8998-9004. ISSN 0013-936X.

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Extraction of boron from aqueous solutions using selective resins is important in a variety of applications including desalination, ultrapure water production, and nuclear power generation. Today’s commercial boron-selective resins are exclusively prepared by functionalization of styrene-divinylbenzene (STY-DVB) beads with N-methylglucamine to produce resins with boron-chelating groups. However, such boron-selective resins have a limited binding capacity with a maximum free base content of 0.7 eq/L, which corresponds to a sorption capacity of 1.16 ± 0.03 mMol/g in aqueous solutions with equilibrium boron concentration of ~70 mM. In this article, we describe the synthesis and characterization of a new resin that can selectively extract boron from aqueous solutions. We show that branched polyethylenimine (PEI) beads obtained from an inverse suspension process can be reacted with glucono-1,5-d-lactone to afford a resin consisting of spherical beads with high density of boron-chelating groups. This resin has a sorption capacity of 1.93 ± 0.04 mMol/g in aqueous solution with equilibrium boron concentration of ~70 mM, which is 66% percent larger than that of standard commercial STY-DVB resins. Our new boron-selective resin also shows excellent regeneration efficiency using a standard acid wash with a 1.0 M HCl solution followed by neutralization with a 0.1 M NaOH solution.

Item Type:Article
Related URLs:
URLURL TypeDescription
Goddard, William A., III0000-0003-0097-5716
Dalleska, Nathan F.0000-0002-2059-1587
Hoffmann, Michael R.0000-0001-6495-1946
Diallo, Mamadou S.0000-0002-2571-1568
Additional Information:© 2012 American Chemical Society. Received: April 17, 2012. Revised: July 3, 2012. Accepted: July 24, 2012. Published: July 24, 2012. This research was carried out at the California Institute of Technology and AquaNano, LLC. Selected materials characterization studies (FT-IR and SEM) were carried out at the Korea Advanced Institute of Science and Technology (KAIST). Funding for this research was provided by the U.S National Science Foundation (NSF) (CBET Award 0506951). M.S.D. and D.P.C. were supported by the KAIST EEWS Initiative (NT080607C0209721). W.A.G. III was supported partially by the KAIST World Class University (WCU) program (NRF-31-2008-000-10055).
Funding AgencyGrant Number
Korea Advanced Institute of Science and Technology (KAIST)NT080607C0209721
National Research Foundation of KoreaNRF-31-2008-000-10055
Issue or Number:16
Record Number:CaltechAUTHORS:20121009-104621400
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Official Citation:Branched Polymeric Media: Boron-Chelating Resins from Hyperbranched Polyethylenimine Himanshu Mishra, Changjun Yu, Dennis P. Chen, William A. Goddard, III, Nathan F. Dalleska, Michael R. Hoffmann, and Mamadou S. Diallo Environmental Science & Technology 2012 46 (16), 8998-9004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34779
Deposited By: Ruth Sustaita
Deposited On:09 Oct 2012 18:12
Last Modified:09 Mar 2020 13:18

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