Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Production of Hydroxyl Radical and Removal of Formaldehyde by Calcined Green Tuff Powder and Tile

Toyohisa Fujita
ORCID logo ,
Lanyin Zhang
,
Gjergj Dodbiba
,
Ji-Whan Anh
,
Yuezhou Wei
* ,
Hiromi Kurokawa
,
Hirofumi Matsui
,
Shigeki Yamamoto
,
Hiroshi Kawaguchi
Version 1 : Received: 10 May 2019 / Approved: 13 May 2019 / Online: 13 May 2019 (10:26:06 CEST)

A peer-reviewed article of this Preprint also exists.

Fujita, T.; Zhang, L.; Dodbiba, G.; Anh, J.-W.; Wei, Y.; Kurokawa, H.; Matsui, H.; Yamamoto, S.; Kawaguchi, H. Production of the Hydroxyl Radical and Removal of Formaldehyde by Calcined Green Tuff Powder and Tile. Sustainability 2019, 11, 3390. Fujita, T.; Zhang, L.; Dodbiba, G.; Anh, J.-W.; Wei, Y.; Kurokawa, H.; Matsui, H.; Yamamoto, S.; Kawaguchi, H. Production of the Hydroxyl Radical and Removal of Formaldehyde by Calcined Green Tuff Powder and Tile. Sustainability 2019, 11, 3390.

Abstract

Wasted Green tuff powder produced by cutting Towada stone is recycled as environmental cleaning material. The optimum temperature for green tuff powder calcination to reduce the hydroxyl radical produced in hydrogen peroxide decomposition with ultraviolet light (UV) and no light. The green tuff calcined at 800 °C shows the large decomposition rate of hydrogen peroxide with no UV light when measured by using ESR. With UV light, the optimum temperature for calcinating the green tuff powder in order to reduce hydroxyl radical is also 800 °C. Next, the powder calcined at 800 °C is used to produce the tile by compression and heating, and then the formaldehyde adsorption rate was measured. The green tuff powder calcined at 800 °C showed a high adsorption rate, similar to that of the activated carbon. The tiles formed at 40 MPa and heated st 1100 °C were the strongest and also adsorbed formaldehyde. The adsorbed formaldehyde on the green tuff tile and powder might have a possibility to decompose by photocatalytic.

Keywords

Green Tuff; Towada stone; calcination; recycle; tile; hydrogen peroxide; radical; ESR; adsorption; formaldehyde, UV; photocatalysis

Subject

Engineering, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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