Application of Graphene Oxide for Adsorption Removal of Geosmin and 2-Methylisoborneol in the Presence of Natural Organic Matter

We investigated the adsorption characteristics of geosmin and 2-methylisoborneol (MIB) on graphene oxide (GO) in the absence and presence of natural organic matter (NOM). The graphene oxide had fast adsorption kinetics for both compounds because of its open-layered structure, with adsorption equilib...

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Bibliographic Details
Published in:International journal of environmental research and public health 2019-05, Vol.16 (11), p.1907
Main Authors: Hafuka, Akira, Nagasato, Takahiro, Yamamura, Hiroshi
Format: Article
Language:English
Subjects:
2-Methylisoborneol
Activated carbon
Adsorbents
Adsorption
Biomedical materials
Camphanes - chemistry
Charcoal - chemistry
Composite materials
Drinking water
Equilibrium
Experiments
Geosmin
Graphene
Graphite - chemistry
Kinetics
Naphthols - chemistry
Odors
Organic matter
Oxides - chemistry
Physicochemical properties
Pollutants
Pore size
Raw water
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water treatment
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Summary:We investigated the adsorption characteristics of geosmin and 2-methylisoborneol (MIB) on graphene oxide (GO) in the absence and presence of natural organic matter (NOM). The graphene oxide had fast adsorption kinetics for both compounds because of its open-layered structure, with adsorption equilibrium being achieved within 15 min of contact. Although NOM did not affect the adsorption of geosmin on GO, it delayed that of MIB, probably because of competition for adsorption sites. The adsorption isotherms show that GO had a greater capacity for geosmin adsorption than for MIB because geosmin was more hydrophobic. Moreover, NOM interfered with the adsorption of MIB onto the GO, but increased the amount of adsorbed geosmin, which likely occurred because NOM increased the dispersibility of GO, which then increased the number of GO adsorption sites. The difference in the effects of NOM on GO adsorption of geosmin and MIB may be explained by their hydrophobicity. Although the adsorption of geosmin and MIB by GO was fast, its capacity to adsorb both compounds was substantially lower than that of activated carbon because of its higher hydrophilicity.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph16111907