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Extreme gas production in anthropogenic fibrous sediments: An overlooked biogenic source of greenhouse gas emissions

Lehoux, Alizee P. and Isidorova, Anastasija and Collin, Fredrik and Koestel, John and Snowball, Ian and Dahlberg, Anna-Karin (2021). Extreme gas production in anthropogenic fibrous sediments: An overlooked biogenic source of greenhouse gas emissions. Science of the Total Environment. 781 , 146772
[Research article]

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Abstract

Fibrous sediments that originated from old pulp and paper industry emissions are recognized as a potential threat to the aquatic environment because they are highly contaminated. In addition, biogenic degradation of the organic material from so-called "fiberbanks" has a high potential to produce greenhouse gases (GHG). In this study, X-ray tomography, optical sensors and gas analyzers were used to identify and quantify the gas produced and released from samples of two different fiberbanks. We show that a finer fibrous structure allows the formation of larger gas bubbles and higher gas production rates compared to coarser material composed of wood pieces. High contents of methane (average 56% to 65%) and carbon dioxide (average 18% to 20%) were measured in the gas emitted from both types of fiberbank. Measured methane production rates from the fiberbanks samples are one to three orders of magnitude higher than previously reported rates from sediments within the studied temperature range (between 0.03 and 0.51 mu m CH4/h/g dw over 4.7 to 20 degrees C). The potential for methane and carbon dioxide production in the fiberbank volume likely present in Sweden is estimated to correspond to 7% of Sweden's total known GHG emissions for 2019. These findings show that fiberbanks have the potential to be a significant emitter of GHG. (C) 2021 The Author(s). Published by Elsevier B.V.

Authors/Creators:Lehoux, Alizee P. and Isidorova, Anastasija and Collin, Fredrik and Koestel, John and Snowball, Ian and Dahlberg, Anna-Karin
Title:Extreme gas production in anthropogenic fibrous sediments: An overlooked biogenic source of greenhouse gas emissions
Series Name/Journal:Science of the Total Environment
Year of publishing :2021
Volume:781
Article number:146772
Number of Pages:8
Publisher:ELSEVIER
ISSN:0048-9697
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Contaminated sediment, Fiberbanks, Methane, Gas release, Paper industry, X-ray
URN:NBN:urn:nbn:se:slu:epsilon-p-112208
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112208
Additional ID:
Type of IDID
DOI10.1016/j.scitotenv.2021.146772
Web of Science (WoS)000655619900011
ID Code:24495
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:10 Jun 2021 11:03
Metadata Last Modified:10 Jun 2021 11:11

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