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RSC Adv

Title:		Cycling system for decomposition of gaseous benzene by hydrogen peroxide with naturally Fe-containing activated carbon
Author(s):		Lee YS; Han SB; Mo YH; Lee SG; Park DH; Song J; Hong S; Park KW;
Address:		"Boyaz Energy 165 Gasan Digital 2-ro, Geumcheon-gu Seoul 08504 Republic of Korea. Department of Chemical Engineering, Soongsil University Seoul 156-743 Republic of Korea kwpark@ssu.ac.kr +82-2-812-5378 +82-2-820-0613. Department of Civil and Environmental Engineering, Sejong University Seoul 05006 Korea"
Journal Title:		RSC Adv
Year:		2020
Volume:		20201026
Issue:		64
Page Number:		39121 - 39129
DOI:		10.1039/d0ra08122a
ISSN/ISBN:		2046-2069 (Electronic) 2046-2069 (Linking)
Abstract:		"For the removal of volatile organic compounds (VOCs) from environmental systems, gaseous benzene, a model VOC, was adsorbed on naturally Fe-containing activated carbon and subsequently, decomposed in the presence of de-ionized water, and low (0.03%, pH 6.5) and high (30%, pH 2.5) concentration H(2)O(2) solutions. The intermediates produced during benzene decomposition were analyzed and compared using gas chromatography-mass spectrometry. After the decomposition process, the activated carbon sample was air dried. Three cycles were carried out with de-ionized water and low and high concentration H(2)O(2) solutions as oxidants. The adsorption capacity of the activated carbon sample treated with DI water gradually decreased as the number of cycles increased. On the other hand, the benzene adsorption capacity of the activated carbon samples treated with the H(2)O(2) solutions was improved due to the relatively higher specific surface areas of these samples. After treatment with the low-concentration H(2)O(2) solution, intermediates such as glyoxylic acid, oxalic acid, phenol, malonic acid, and pyrocatechol were observed. After treatment with high-concentration H(2)O(2) solution, intermediates such as glyoxylic acid, formic acid, and acetic acid were formed. With increasing H(2)O(2) concentration, the number and the molecular weight of the intermediate formed by the oxidative degradation of benzene, simultaneously decreased. The Fenton reaction induced by naturally Fe-containing activated carbon and H(2)O(2) could lead to more efficient decomposition of benzene"
Keywords:
Notes:		"PubMed-not-MEDLINELee, Yong-Soo Han, Sang-Beom Mo, Yong-Hwan Lee, Seul-Gi Park, Deok-Hye Song, JiHyun Hong, Seongho Park, Kyung-Won eng England 2020/10/26 RSC Adv. 2020 Oct 26; 10(64):39121-39129. doi: 10.1039/d0ra08122a. eCollection 2020 Oct 21"