Superiority of wet-milled over dry-milled superfine powdered activated carbon for adsorptive 2-methylisoborneol removal

Pan, Long; Matsui, Yoshihiko; Matsushita, Taku; Shirasaki, Nobutaka

Superiority of wet-milled over dry-milled superfine powdered activated carbon for adsorptive 2-methylisoborneol removal

Pan, Long; Matsui, Yoshihiko; Matsushita, Taku et al.

Water research, 2016, 102, 516-523

Permalink : https://hdl.handle.net/2115/71589

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/71589
タイトル	Superiority of wet-milled over dry-milled superfine powdered activated carbon for adsorptive 2-methylisoborneol removal
著者	Pan, Long ; Matsui, Yoshihiko ; Matsushita, Taku ; Shirasaki, Nobutaka
著者名 Pan, Long
e-Rad_Researcher 00173790 著者名 Matsui, Yoshihiko
e-Rad_Researcher 30283401 著者名 Matsushita, Taku
著者名 Shirasaki, Nobutaka
言語	英語
キーワード	S-PAC
	Submicron
	Grind
	Adsorbent
	Aggregation
	Agglomeration
発行日	2016-10-01
出版者	Elsevier
収録物名	Water research
巻(号)	102
ページ	516-523
抄録	Superfine powdered activated carbon (SPAC), which is produced from conventionally sized powdered activated carbon (PAC) by wet milling in a bead mill, has attracted attention for its high adsorptive removal ability in both research and practice. In this study, the performance of dry-milled SPAC was investigated. 2-Methylisoborneol (MIB), an earthy-musty compound commonly targeted by water treatment systems, was used as the target adsorbate. Dry-milled SPAC exhibited lower adsorptive removal of MIB than wet-milled SPAC, even when both SPACs were produced from the same PAC and were composed of particles of the same size. One reason for the lower removal of MIB by the dry-milled SPAC was a higher degree of aggregation in the dry-milled SPAC after production; as a result the apparent particle size of dry-milled SPAC was larger than that of wet-milled SPAC. The dry-milled SPAC was also more negatively charged than the wet-milled SPAC, and, owing to its higher repulsion, it was more amenable to dispersion by ultrasonication. However, even after the dry-milled SPAC was ultrasonicated so that its apparent particle size was similar to or less than that of the wet-milled SPAC, the dry-milled SPAC was still inferior in adsorptive removal to the wet-milled SPAC. Therefore, another reason for the lower adsorptive removal of dry-milled SPAC was its lower equilibrium adsorption capacity, due to the oxidation during the milling. The adsorption kinetics by SPACs with different degrees of particle aggregation were successfully simulated by a pore diffusion model and a fractal aggregation model.
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	© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0043-1354
関連情報	PMID 27403874
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.watres.2016.06.062