Soot black carbon concentration and isotopic composition in soils from an arid urban ecosystem

George A. Hamilton, Hilairy Hartnett

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Black carbon (BC) is a poorly understood type of organic carbon but it is present in almost all environmental systems (i.e., atmosphere, soil and water). This work focuses on soot BC in desert soils and, in particular, urban soils from the Phoenix, Arizona metropolitan area. Soot BC is that fraction of black carbon formed from the condensation of gas phase molecules produced during burning. Soot BC in Phoenix area soils exhibits a range in both concentration and isotopic composition. Soot BC concentration in 52 soils (desert, agricultural and urban) ranges from 0.02-0.54. wt% and comprises from <. 1 to as much as 89% of the soil organic carbon (OC). Soot BC concentrations are higher in urban soils than in desert or agricultural soils. The average isotopic composition of soot BC is -18‰. ±. 3‰; this is an enrichment of 5.5‰ relative to bulk soil organic carbon. The distribution in concentration and variation in isotopic composition across the study area suggests soot BC in this arid-land city has multiple sources, including a significant fossil fuel component.

Original languageEnglish (US)
Pages (from-to)87-94
Number of pages8
JournalOrganic Geochemistry
Volume59
DOIs
StatePublished - Jun 2013

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Soot
urban ecosystem
soot
black carbon
Ecosystems
isotopic composition
Soils
Chemical analysis
desert soil
soil
organic carbon
Organic carbon
agricultural soil
metropolitan area
fossil fuel
condensation

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Soot black carbon concentration and isotopic composition in soils from an arid urban ecosystem. / Hamilton, George A.; Hartnett, Hilairy.

In: Organic Geochemistry, Vol. 59, 06.2013, p. 87-94.

Research output: Contribution to journalArticle

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