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Evaluating behavior of oxygen, nitrate, and sulfate during recharge and quantifying reduction rates in a contaminated aquifer.
- J. McGuire, D. T. Long, M. Klug, S. Haack, D. Hyndman
- Chemistry, Medicine
- Environmental science & technology
- 23 April 2002
This study evaluates the biogeochemical changes that occur when recharge water comes in contact with a reduced aquifer. It specifically addresses (1) which reactions occur in situ, (2) the order in… Expand
Analysis of recharge-induced geochemical change in a contaminated aquifer.
Recharge events that deliver electron acceptors such as O2, NO3, SO4, and Fe3+ to anaerobic, contaminated aquifers are likely important for natural attenuation processes. However, the specific… Expand
Centimeter-scale characterization of biogeochemical gradients at a wetland–aquifer interface using capillary electrophoresis
Abstract Steep biogeochemical gradients were measured at mixing interfaces in a wetland–aquifer system impacted by landfill leachate in Norman, Oklahoma. The system lies within a reworked alluvial… Expand
Inverse estimation of parameters for multidomain flow models in soil columns with different macropore densities.
Soil and crop management practices have been found to modify soil structure and alter macropore densities. An ability to accurately determine soil hydraulic parameters and their variation with… Expand
Chapter 15 Scanning Electron Microscopy of Garnet from Southern Michigan Soils: Etching Rates and Inheritance of Pre-Glacial and Pre-Pedogenic Grain-Surface Textures
Abstract Garnet surface textures are known to be modified by processes in several portions of the sedimentary cycle: (1) weathering (first-cycle), (2) erosion, transportation, and deposition by… Expand
Spatial and temporal changes in microbial community structure associated with recharge-influenced chemical gradients in a contaminated aquifer.
In a contaminated water-table aquifer, we related microbial community structure on aquifer sediments to gradients in 24 geochemical and contaminant variables at five depths, under three recharge… Expand
Temporal dynamics of biogeochemical processes at the Norman Landfill site
 The temporal variability observed in redox sensitive species in groundwater can be attributed to coupled hydrological, geochemical, and microbial processes. These controlling processes are… Expand
Plasma Alpha‐Tocopherol, Retinol, Cholesterol, and Mineral Concentrations in Captive Gorillas
- J. McGuire, E. Dierenfeld, R. Poppenga, W. E. Brazelton
- Biology, Medicine
- Journal of medical primatology
- 1 April 1989
Vitamins A, E, cholesterol, and mineral (calcium, copper, iron, magnesium, phosphorus, selenium, sodium, and zinc) concentrations were examined in the plasma of 74 captive lowland gorillas aged… Expand
Evaluation of sulfate reduction at experimentally induced mixing interfaces using small-scale push-pull tests in an aquifer-wetland system
Abstract This paper presents small-scale push–pull tests designed to evaluate the kinetic controls on SO 4 2 - reduction in situ at mixing interfaces between a wetland and aquifer impacted by… Expand
Enhanced biogeochemical cycling and subsequent reduction of hydraulic conductivity associated with soil-layer interfaces in the vadose zone.
- D. Hansen, J. McGuire, B. Mohanty
- Environmental Science, Medicine
- Journal of environmental quality
- 1 November 2011
Biogeochemical dynamics in the vadose zone are poorly understood due to the transient nature of chemical and hydrologic conditions but are nonetheless critical to understanding chemical fate and… Expand