Geology topics

Research about Kingsford, Michigan

Source-linked reports with geographic coverage including Kingsford, Michigan.

2 recordsLinked to original sources

USGS2001

Compound-specific carbon isotope analysis of a contaminant plume in Kingsford, Michigan, USA

Compound-specific isotope analysis was used to study a contaminated site near Kingsford, Michigan, USA. Organic compounds at three of the sites studied had similar 13C values indicating that the contaminant source is the same for all sites. At a fourth site, chemical and 13C values had evolved due to microbial degradation of organics, with the 13C being much heavier than the starting materials. A microcosm experiment was run to observe isotopic changes with time in the methane evolved and in compounds remaining in the water during degradation. The 13C values of the methane became heavier during the initial period of the run when volatile fatty acids were being consumed. There was an abrupt decrease in the 13C values when fatty acids had been consumed and phenols began to be utilized. The 13C value of the propionate remaining in solution also increased, similar to the results found in the field.

Michigan↗

USGS2001

Methanogenic biodegradation of charcoal production wastes in groundwater at Kingsford, Michigan, USA

A house exploded in the City of Kingsford, Michigan USA. The explosion was caused by CH4 that leaked into the basement from the surrounding soil. Evidence suggests that biodegradation of products from the distillation and spillage at or near a former wood carbonization plant site was the major source of CH4 and CO2 in the groundwater system. The plant area is directly upgradient from deep groundwater, samples of which are green-yellow in colour, have a very strong odour of burnt wood, contain high concentrations of mononuclear aromatic and phenolic compounds, and extremely high concentrations of volatile fatty acids. The majority of the dissolved compounds in these groundwater samples have been shown, using laboratory microcosms, to be anaerobically biodegradable to CH4 and CO2. The biodegradable compounds, and the amounts of CH4 and CO2 produced in the microcosms, are consistent with observations from field samples.

Michigan↗