Adsorptive Removal of Pharmaceuticals and Personal Care Products from Water with Functionalized Metal-organic Frameworks: Remarkable Adsorbents with Hydrogen-bonding Abilities.
Adsorption of typical pharmaceuticals and personal care products (PPCPs) (such as naproxen, ibuprofen and oxybenzone) from aqueous solutions was studied by using the highly porous metal-organic framework (MOF) MIL-101 with and without functionalization. Adsorption results showed that MIL-101s with H-donor functional groups such as -OH and -NH2were very effective for naproxen adsorption, despite a decrease in porosity, probably because of H-bonding between O atoms on naproxen and H atoms on the adsorbent. For this reason, MIL-101 with two functional groups capable of H-bonding (MIL-101-(OH)2) exhibited remarkable adsorption capacity based on adsorbent surface area. The favorable contributions of -OH and -(OH)2on MIL-101 in the increased adsorption of ibuprofen and oxybenzone (especially based on porosity) confirmed again the importance of H-bonding mechanism. The adsorbent with the highest adsorption capacity, MIL-101-OH, was very competitive when compared with carbonaceous materials, mesoporous materials, and pristine MIL-101. Moreover, the MIL-101-OH could be recycled several times by simply washing with ethanol, suggesting potential application in the adsorptive removal of PPCPs from water.
Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea.
Pill Won
PW
Seo
Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea.
Biswa Nath
BN
Bhadra
Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea.
Imteaz
I
Ahmed
Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea.
Nazmul Abedin
NA
Khan
Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea.
Sung Hwa
SH
Jhung
D000327:Adsorption; D001577:Benzophenones / Q000737:chemistry*; D006801:Humans; D006860:Hydrogen Bonding; D007052:Ibuprofen / Q000737:chemistry*; D009288:Naproxen / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D001577:Benzophenones; D007052:Ibuprofen; D009288:Naproxen; D062065:Wastewater; C005290:oxybenzone
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