Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 6, 2010
Accepted January 12, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

The removal of low concentration formaldehyde over sewage sludge char treated using various methods

Ji Young Lee¹ Sung Hoon Park² Jong-Ki Jeon³ Kyung-Seun Yoo⁴ Seung-Soo Kim⁵ Young-Kwon Park^{1 6†}

¹Graduate School of Energy and Environmental Engineering, University of Seoul, Seoul 130-743, Korea ²Department of Environmental Engineering, Sunchon National University, Suncheon 540-742, Korea ³Department of Chemical Engineering, Kongju National University, Cheonan 330-717, Korea ⁴Department of Environmental Engineering, Kwangwoon University, Seoul 139-701, Korea ⁵Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, Korea ⁶School of Environmental Engineering, University of Seoul, Seoul 130-743, Korea

catalica@uos.ac.kr

Korean Journal of Chemical Engineering, July 2011, 28(7), 1556-1560(5), 10.1007/s11814-011-0007-7

Download PDF

Abstract

Sewage sludge char was activated, using several different methods, to be used for the adsorption of formaldehyde. First, sewage sludge was pyrolyzed at 700℃ for one hour to produce char. The sewage sludge char was then activated with 20% steam gas. To produce a chemically activated char, KOH was used with the char at a weight ratio of KOH/char=0.5. To produce another kind of activated char containing nitrogen functional groups, the sewage sludge char was activated with ammonia at 350℃ . These activated chars were used for indoor low concentration formaldehyde adsorption experiments. All the chars tested in this study were shown to have better performance than activated carbon. In particular, the char activated with both ammonia and KOH showed the best formaldehyde adsorption performance. This result was attributed to the combination of surface basicity due to large amounts of metal components and generation of oxygen and nitrogen functional groups as a result of the KOH and ammonia treatments.

Keywords

Activated Sewage Sludge Char Low Concentration Formaldehyde Indoor Air

References

Kim MH, Kim YS, Lim JJ, Kim JT, Sung SW, Yoo CK, Korean J. Chem. Eng., 27(6), 1675 (2010)
Kim YH, Jung H, Changshin S, Kim DH, Korean J. Chem. Eng., 27(2), 531 (2010)
Rong H, Ryu Z, Zheng J, Zhang Y, Carbon., 40, 2291 (2002)
Tanada S, Kawasaki N, Nakamura T, Araki M, Isomura M, J. Colloid Interface Sci., 214(1), 106 (1999)
Song Y, Qiao W, Yoon SH, Mochida I, Guo Q, Liu L, J. Appl. Polym. Sci., 106(4), 2151 (2007)
Kumagai S, Sasaki K, Shimizu Y, Takeda K, Sep. Purif. Technol., 61(3), 398 (2008)
Jo YB, Cha JS, Ko JH, Shin MC, Park SH, Jeon JK, Kim SS, Park YK, Korean J. Chem. Eng., 28(1), 106 (2011)
Kim DI, Park JH, Kim SD, Lee JY, Yim JH, Jeon JK, Park SH, Park YK, J. Ind. Eng. Chem., 17(1), 1 (2011)
Busca G, Lamotte J, Lavally JC, Lorenzelli V, J. Am. Chem.Soc., 109, 5197 (1987)
Srisuda S, Virote B, J. Environ. Sci., 20, 379 (2008)
Fierro V, Muniz G, Basta AH, El-Saied H, Celzard A, J. Hazard. Mater., 181(1-3), 27 (2010)
Boonamnuayvitaya V, Sae-ung S, Tanthapanichakoon W, Sep. Purif. Technol., 42(2), 159 (2005)
El-Sayed Y, Bandosz TJ, Stud. Surf. Sci. Catal., 144, 247 (2002)