Formaldehyde emission from wood promoted by lignin in the presence of iron residues. Issue 17 (16th August 2022)

• Record Type: Journal Article
• Authors: Fu, Yu; Zhu, Yuan; Shi, Sheldon Q.; Goodell, Barry
• Is Part Of: Green chemistry. Volume 24:Issue 17(2022)
• Page Start: 6631
• Page End: 6638
• Publication Date: 2022-08-16
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d2gc02632e
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : A Lignin-Mediated Fenton (LMF) mechanism for low temperature generation of formaldehyde from wood is described where low levels of iron (ubiquitous in the environment) participate in oxygen radical generation which then initiates attack on lignin. Abstract : It is known that wood releases low levels of formaldehyde under natural conditions, but the mechanism for this release has not been well explored. This paper presents the lignin-mediated Fenton (LMF) reaction as a newly described mechanism for the generation of formaldehyde from wood lignin in the presence of iron. Traditional desiccator methods with Nash reagent and fluorescence spectrophotometry, and a commercial electrochemical-based formaldehyde sensor were used to examine the effects of important components in the LMF reaction i.e., iron reductant, hydrogen peroxide and lignin, on the wood formaldehyde emission in the presence of iron. The results showed that low levels of iron, especially in its reduced ferrous oxidation state, promoted the generation of formaldehyde in the presence of lignin in wood. Experiments were also conducted with additional iron reductants and hydrogen peroxide, which demonstrated additional formaldehyde generation in the presence of ferric iron and lignin, suggesting active generation of formaldehyde from wood by the LMF reaction.