Branched polymeric media: Perchlorate-selective resins from hyperbranched polyethyleneimine

Handle URI:
http://hdl.handle.net/10754/577045
Title:
Branched polymeric media: Perchlorate-selective resins from hyperbranched polyethyleneimine
Authors:
Chen, Dennis P.; Yu, Changjun; Chang, ChingYu; Wan, Yanjian; Frechet, Jean ( 0000-0001-6419-0163 ) ; Goddard, William A.; Diallo, Mamadou S.
Abstract:
Perchlorate (ClO4 -) is a persistent contaminant found in drinking groundwater sources in the United States. Ion exchange (IX) with selective and disposable resins based on cross-linked styrene divinylbenzene (STY-DVB) beads is currently the most commonly utilized process for removing low concentrations of ClO4 - (10-100 ppb) from contaminated drinking water sources. However, due to the low exchange capacity of perchlorate-selective STY-DVB resins (∼0.5-0.8 eq/L), the overall cost becomes prohibitive when treating groundwater with higher concentration of ClO4 - (e.g., 100-1000 ppb). In this article, we describe a new perchlorate-selective resin with high exchange capacity. This new resin was prepared by alkylation of branched polyethyleneimine (PEI) beads obtained from an inverse suspension polymerization process. Batch and column studies show that our new PEI resin with mixed hexyl/ethyl quaternary ammonium chloride exchange sites can selectively extract trace amounts of ClO4 - from a makeup groundwater (to below detection limit) in the presence of competing ions. In addition, this resin has a strong-base exchange capacity of 1.4 eq/L, which is 1.75-2.33 times larger than those of commercial perchlorate-selective STY-DVB resins. The overall results of our studies suggest that branched PEI beads provide versatile and promising building blocks for the preparation of perchlorate-selective resins with high exchange capacity. © 2012 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Chemical Science Program
Publisher:
American Chemical Society (ACS)
Journal:
Environmental Science & Technology
Issue Date:
2-Oct-2012
DOI:
10.1021/es301418j
PubMed ID:
22950356
Type:
Article
ISSN:
0013936X
Sponsors:
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. Diallo and D. P. Chen were supported by the KAIST EEWS Initiative (NT080607C0209721). W. A. Goddard III was supported partially by the KAIST World Class University (WCU) program (NRF-31-2008-000-10055).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program

Full metadata record

DC FieldValue Language
dc.contributor.authorChen, Dennis P.en
dc.contributor.authorYu, Changjunen
dc.contributor.authorChang, ChingYuen
dc.contributor.authorWan, Yanjianen
dc.contributor.authorFrechet, Jeanen
dc.contributor.authorGoddard, William A.en
dc.contributor.authorDiallo, Mamadou S.en
dc.date.accessioned2015-09-10T09:27:28Zen
dc.date.available2015-09-10T09:27:28Zen
dc.date.issued2012-10-02en
dc.identifier.issn0013936Xen
dc.identifier.pmid22950356en
dc.identifier.doi10.1021/es301418jen
dc.identifier.urihttp://hdl.handle.net/10754/577045en
dc.description.abstractPerchlorate (ClO4 -) is a persistent contaminant found in drinking groundwater sources in the United States. Ion exchange (IX) with selective and disposable resins based on cross-linked styrene divinylbenzene (STY-DVB) beads is currently the most commonly utilized process for removing low concentrations of ClO4 - (10-100 ppb) from contaminated drinking water sources. However, due to the low exchange capacity of perchlorate-selective STY-DVB resins (∼0.5-0.8 eq/L), the overall cost becomes prohibitive when treating groundwater with higher concentration of ClO4 - (e.g., 100-1000 ppb). In this article, we describe a new perchlorate-selective resin with high exchange capacity. This new resin was prepared by alkylation of branched polyethyleneimine (PEI) beads obtained from an inverse suspension polymerization process. Batch and column studies show that our new PEI resin with mixed hexyl/ethyl quaternary ammonium chloride exchange sites can selectively extract trace amounts of ClO4 - from a makeup groundwater (to below detection limit) in the presence of competing ions. In addition, this resin has a strong-base exchange capacity of 1.4 eq/L, which is 1.75-2.33 times larger than those of commercial perchlorate-selective STY-DVB resins. The overall results of our studies suggest that branched PEI beads provide versatile and promising building blocks for the preparation of perchlorate-selective resins with high exchange capacity. © 2012 American Chemical Society.en
dc.description.sponsorshipThis 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. Diallo and D. P. Chen were supported by the KAIST EEWS Initiative (NT080607C0209721). W. A. Goddard III was supported partially by the KAIST World Class University (WCU) program (NRF-31-2008-000-10055).en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleBranched polymeric media: Perchlorate-selective resins from hyperbranched polyethyleneimineen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.identifier.journalEnvironmental Science & Technologyen
dc.contributor.institutionGraduate School, Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejon, South Koreaen
dc.contributor.institutionAquaNano, LLC, Monrovia, CA, United Statesen
dc.contributor.institutionEnvironmental Science and Engineering Division, Engineering and Applied Science, California Institute of Technology, Pasadena, CA, United Statesen
dc.contributor.institutionDepartment of Chemistry, University of California, Berkeley, CA, United Statesen
dc.contributor.institutionMaterials and Process Simulation Center, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, United Statesen
kaust.authorFrechet, Jeanen

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