Pressure-stable imprinted polymers for waste water remediation

Shane Mann, Travis Johnson, Evie Medendorp, Robert Ocomen, Luke DeHart, Adam Bauer, Bingbing Li, Mary Tecklenburg, Anja Mueller

Research output: Contribution to journalArticlepeer-review

Abstract

In wastewater treatment, the removal of heavy metal ions is difficult. Ion exchange resins are ineffective since heavy metal ions cannot compete with "hard ions" in binding to the resins. Imprinting polymerization can increase the specificity of ion exchange resins to allow heavy metal ions to compete. Unfortunately, a high capacity is also needed. When high porosity and surface area are used to increase capacity, polymeric resins lose pressure stability needed for water treatment. In this research, a bulky, hydrophobic co-monomer was used to prevent Zn+2 imprinted sites from collapsing. Both the co-monomer and crosslinking density were optimized to allow for maximum pore access while maintaining pressure stability. IR and SEM studies were used to study phase separation of the hydrophobic co-monomer from the hydrophilic resin. Capacity was measured for just the imprinting ion first, and then in combination with a competing ion and compared with porosity and pore-size measurements. Capacity under pressure was also characterized. A resin with high capacity was identified that allowed for the heavy metal ion to compete while still maintaining pressure stability.

Original languageEnglish
Article number704
JournalPolymers
Volume10
Issue number7
DOIs
StatePublished - Jun 26 2018

Keywords

  • Calcium ions
  • Heavy metal ions
  • Intermolecular bonds
  • Ion imprinted polymers (IIP)
  • Molecularly-imprinted polymer (MIP)
  • Pressure stable
  • Water remediation
  • Zinc ions

Fingerprint

Dive into the research topics of 'Pressure-stable imprinted polymers for waste water remediation'. Together they form a unique fingerprint.

Cite this