Evaluation of Adsorption Characteristics of a Fibrous Adsorbent Containing Zwitter-Ionic Functional Group, Targeting Organic Acids.
Diallylamine-maleic acid copolymer (DAM)-nonwoven fabric (DAM-f), a fibrous adsorbent, contains DAM with zwitter-ionic functional groups and forms a hydration layer on the surface. The aim of this report was to evaluate the adsorption selectivity of DAM-f to semi-volatile organic acid (C1-C5). In the aqueous phase, formic acid dissolved in the hydration layer bound to the imino group of DAM-f due to anion exchange interaction. In the gas phase, the adsorption amounts of organic acids increased with the exposure time. Moreover, the adsorption rate constants correlated with the air/water partition coefficients (log Kaw) for formic acid, propionic acid, butyric acid, valeric acid and isovaleric acid, except for acetic acid. These results indicate that DAM-f is highly selective to hydrophilic compounds which easily move from the air to the hydration layer of DAM-f.
Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Pharmaceutical Sciences, Kanazawa University, Japan.
Akira
A
Nakazawa
Ning
N
Tang
Yoshinori
Y
Inoue
Waka
W
Kamichatani
Toshifumi
T
Katoh
Mitsuru
M
Saito
Kenji
K
Obara
Akira
A
Toriba
Kazuichi
K
Hayakawa
D019342:Acetic Acid; D000327:Adsorption; D000388:Air; D000499:Allylamine / Q000737:chemistry; D000838:Anions; D020148:Butyric Acid; D005561:Formates; D005740:Gases; D045782:Hemiterpenes; D057927:Hydrophobic and Hydrophilic Interactions; D007474:Ion Exchange; D008298:Maleates / Q000737:chemistry; D010421:Pentanoic Acids; D011108:Polymers / Q000737:chemistry; D011422:Propionates; D014867:Water
D000838:Anions; D005561:Formates; D005740:Gases; D045782:Hemiterpenes; D008298:Maleates; D010421:Pentanoic Acids; D011108:Polymers; D011422:Propionates; D014867:Water; C030544:formic acid; D020148:Butyric Acid; C008216:isovaleric acid; D000499:Allylamine; C030272:maleic acid; C038780:n-pentanoic acid; C029658:propionic acid; D019342:Acetic Acid