Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Sorption of Pure N2O to Biochars and Other Organic and Inorganic Materials under Anhydrous Conditions
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för tillämpad miljövetenskap (ITM). US Geol Survey, Denver, CO 80225 USA.
Visa övriga samt affilieringar
2013 (Engelska)Ingår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 47, nr 14, s. 7704-7712Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Suppression of nitrous oxide (N2O) emissions from soil is commonly observed after amendment with biochar. The mechanisms accounting for this suppression are not yet understood. One possible contributing mechanism is N2O sorption to biochar. The sorption of N2O and carbon dioxide (CO2) to four biochars was measured in an anhydrous system with pure N2O. The biochar data were compared to those for two activated carbons and other components potentially present in soils-uncharred pine wood and peat-and five inorganic metal oxides with variable surface areas. Langmuir maximum sorption capacities (Q(max)) for N2O on the pine wood biochars (generated between 250 and 500 degrees C) and activated carbons were 17-73 cm(3) g(-1) at 20 degrees C (median 51 cm(3) g(-1)), with Langmuir affinities (b) of 2-5 atm(-1) (median 3.4 atm(-1)). Both Q(max) and b of the charred materials were substantially higher than those for peat, uncharred wood, and metal oxides [Q(max) 1-34 cm(3) g(-1) (median 7 cm(3) g(-1)); b 0.4-1.7 atm(-1) (median 0.7 atm(-1))]. This indicates that biochar can bind N2O more strongly than both mineral and organic soil materials. Q(max) and b for CO2 were comparable to those for N2O. Modeled sorption coefficients obtained with an independent polyparameterlinear free-energy relationship matched measured data within a factor 2 for mineral surfaces but underestimated by a factor of 5-24 for biochar and carbonaceous surfaces. Isosteric enthalpies of sorption of N2O were mostly between -20 and -30 kJ mol(-1), slightly more exothermic than enthalpies of condensation (-16.1 kJ mol(-1)). Q(max) of N2O on biochar (50000-130000 mu g g(-1) biochar at 20 degrees C) exceeded the N2O emission suppressions observed in the literature (range 0.5-960 mu g g(-1) biochar; median 16 mu g g(-1)) by several orders of magnitude. Thus, the hypothesis could not be falsified that sorption of N2O to biochar is a mechanism of N2O emission suppression.

Ort, förlag, år, upplaga, sidor
2013. Vol. 47, nr 14, s. 7704-7712
Nationell ämneskategori
Miljövetenskap Ekologi Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:su:diva-93775DOI: 10.1021/es400676qISI: 000322059800018OAI: oai:DiVA.org:su-93775DiVA, id: diva2:649417
Anmärkning

AuthorCount:6;sd

Tillgänglig från: 2013-09-18 Skapad: 2013-09-16 Senast uppdaterad: 2022-02-24Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Person

Cornelissen, Gerard

Sök vidare i DiVA

Av författaren/redaktören
Cornelissen, Gerard
Av organisationen
Institutionen för tillämpad miljövetenskap (ITM)
I samma tidskrift
Environmental Science and Technology
MiljövetenskapEkologiTeknik och teknologier

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 80 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf