Cell wall-associated transition metals improve alkaline-oxidative pretreatment in diverse hardwoods

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Bansal, NamitaDOE-Great Lakes Bioenergy Research Center, Michigan State University, East Lansing (author)

Cell wall-associated transition metals improve alkaline-oxidative pretreatment in diverse hardwoods

Article/chapterEnglish2016

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2016
Royal Society of Chemistry (RSC),2016
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LIBRIS-ID:oai:DiVA.org:ltu-12317
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-12317URI
https://doi.org/10.1039/c5gc01748cDOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Validerad; 2016; Nivå 2; 20160311 (andbra)
The responses of four diverse hardwoods (hybrid poplar, silver birch, hybrid aspen, and sugar maple) to alkaline hydrogen peroxide (AHP) pretreated at ambient temperature and pressure were analyzed to gain a deeper understanding of the cell wall properties that contribute to differences in enzymatic hydrolysis efficacy following alkaline-oxidative pretreatment. The enzymatic hydrolysis yields of these diverse hardwoods increased significantly with increasing the cell wall-associated, redox-active transition metal content. These increases in hydrolysis yields were directly correlated with improved delignification. Furthermore, we demonstrated that these improvements in hydrolysis yields could be achieved either through elevated levels of naturally-occurring metals, namely Cu, Fe, and Mn, or by the addition of a homogeneous transition metal catalyst (e.g. Cu 2,2′-bipyridine complexes) capable of penetrating into the cell wall matrix. Removal of naturally-occurring cell wall-associated transition metals by chelation resulted in substantial decreases in the hydrolysis yields following AHP pretreatment, while re-addition of metals in the form of Cu 2,2′-bipyridine complexes and to a limited extent Fe 2,2′-bipyridine complexes prior to pretreatment restored the improved hydrolysis yields. Glycome profiles showed improved extractability of xylan, xyloglucan, and pectin epitopes with increasing hydrolysis yields for the diverse hardwoods subjected to the alkaline-oxidative pretreatment, demonstrating that the strength of association between cell wall matrix polymers decreased as a consequence of improved delignification

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Industriell bioteknik Bioprocessteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Bioprocess Technology hsv//eng
Biokemisk processteknik
Biochemical Process Engineering

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Bhalla, AdityaDOE-Great Lakes Bioenergy Research Center, Michigan State University, East Lansing (author)
Pattathil, SivakumarUniversity of Georgia, Complex Carbohydrate Research Center, University of Georgia, Athens, GA (author)
Adelman, Sara L.DOE-Great Lakes Bioenergy Research Center, Michigan State University, East Lansing (author)
Hahn, Michael GUniversity of Georgia, Complex Carbohydrate Research Center, University of Georgia, Athens, GA (author)
Hodge, DavidLuleå tekniska universitet,Industriell miljö- och processteknik(Swepub:ltu)davhod (author)
Hegg, Eric L.Michigan State University, DOE-Great Lakes Bioenergy Research Center, University of Wisconsin, Madison (author)
DOE-Great Lakes Bioenergy Research Center, Michigan State University, East LansingUniversity of Georgia, Complex Carbohydrate Research Center, University of Georgia, Athens, GA (creator_code:org_t)

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In:Green Chemistry: Royal Society of Chemistry (RSC)18:5, s. 1405-14151463-92621463-9270

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By the author/editor: Bansal, Namita; Bhalla, Aditya; Pattathil, Sivak ...; Adelman, Sara L.; Hahn, Michael G; Hodge, David; show more...; Hegg, Eric L.; show less...

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bioprocess Techn ...

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By the university: Luleå University of Technology

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