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Polymers 2018, 10(7), 704; https://doi.org/10.3390/polym10070704

Pressure-Stable Imprinted Polymers for Waste Water Remediation

1
Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA
2
Department of Science of Advanced Materials, Central Michigan University, Mount Pleasant, MI 48859, USA
*
Author to whom correspondence should be addressed.
Received: 8 May 2018 / Revised: 14 June 2018 / Accepted: 23 June 2018 / Published: 26 June 2018
(This article belongs to the Special Issue Molecularly Imprinted Polymers)
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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. View Full-Text
Keywords: molecularly-imprinted polymer (MIP); heavy metal ions; water remediation; zinc ions; calcium ions; intermolecular bonds; pressure stable; ion imprinted polymers (IIP) molecularly-imprinted polymer (MIP); heavy metal ions; water remediation; zinc ions; calcium ions; intermolecular bonds; pressure stable; ion imprinted polymers (IIP)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mann, S.; Johnson, T.; Medendorp, E.; Ocomen, R.; DeHart, L.; Bauer, A.; Li, B.; Tecklenburg, M.; Mueller, A. Pressure-Stable Imprinted Polymers for Waste Water Remediation. Polymers 2018, 10, 704.

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