Effects of Pre, Post, and Simultaneous Loading of Natural Organic Matter on 2-Methylisoborneol Adsorption on Superfine Powdered Activated Carbon : Reversibility and External Pore-blocking

Nakayama, Akiko; Sakamoto, Asuka; Matsushita, Taku; Matsui, Yoshihiko; Shirasaki, Nobutaka

Effects of Pre, Post, and Simultaneous Loading of Natural Organic Matter on 2-Methylisoborneol Adsorption on Superfine Powdered Activated Carbon : Reversibility and External Pore-blocking

Nakayama, Akiko; Sakamoto, Asuka; Matsushita, Taku et al.

Water Research, 2020, 182, 115992

Permalink : https://hdl.handle.net/2115/86645

このアイテムのアクセス数:258件（2026-01-17 03:41 集計）

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アクセス権	open access
URI	https://hdl.handle.net/2115/86645
タイトル	Effects of Pre, Post, and Simultaneous Loading of Natural Organic Matter on 2-Methylisoborneol Adsorption on Superfine Powdered Activated Carbon : Reversibility and External Pore-blocking
著者	Nakayama, Akiko ; Sakamoto, Asuka ; Matsushita, Taku ; Matsui, Yoshihiko ; Shirasaki, Nobutaka
著者名 Nakayama, Akiko
著者名 Sakamoto, Asuka
e-Rad_Researcher 30283401 著者名 Matsushita, Taku
e-Rad_Researcher 00173790 著者名 Matsui, Yoshihiko
e-Rad_Researcher 60604692 著者名 Shirasaki, Nobutaka
言語	英語
キーワード	PAC
	particle size
	sub-micrometer
	competitive adsorption
	humic substance
	taste and odor
発行日	2020-09-01
出版者	Elsevier
収録物名	Water Research
巻(号)	182
ページ	115992
抄録	Three different natural organic matter (NOM)-loading methods were compared for the adsorptive removal of 2-methylisoborneol (MIB) by superfine powdered activated carbon (SPAC) and conventionally-sized powdered activated carbon (PAC). The three NOM-loading methods were: NOM adsorption followed by MIB (MIB adsorption on NOM-preloaded carbon), MIB adsorption followed by NOM (MIB adsorption on NOM post-loaded carbon), and simultaneous NOM and MIB loading (MIB adsorption on NOM-simultaneously loaded carbon). MIB removals were similar for the smaller-sized carbon (SPAC) at higher AC dosages and at lower initial NOM concentrations. The similar MIB removals indicate direct site competition between MIB and NOM with MIB adsorption reversibility (complete desorption of MIB by NOM). At lower AC doses, especially for PACs, and at higher initial NOM concentrations, the adsorption of MIBs depended on the sequence of MIB or NOM adsorption. MIB removal was lowest for the NOM-preloaded carbon, followed by NOM-simultaneously loaded carbon. The highest MIB removal was achieved by post-loading of NOM, indicating that the adsorption is irreversible. MIB adsorption on SPAC was more reversible than on PAC, although the pore size distributions of the two carbons were similar. The high degree of adsorption irreversibility for PAC compared with SPAC indicated that pore blocking occurs due to NOM loading at the PAC particle surface. Images of the external adsorption were obtained using isotope mapping and N-labeled effluent organic matter.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0043-1354
NCID	AA00886427
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.watres.2020.115992