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Strontium isotopic and trace element geochemistry of the Saddle Mountains and Grande Rondé basalts of the Columbia River basalt group

Creator:: Nelson, Dennis O.
Resource Type:: Dissertation
Full Text:: OF Dennis 0. Nelson for the degree of Doctor of Philosophy in Geology presented on June 6, 1979

Risk and the selection of alternative weed management technologies in Philippine upland rice production

Creator:: O'Brien, Dennis Terrence
Resource Type:: Dissertation
Full Text:: -25 days after planting o Hill up at 40-45 days after planting Source: Garrity, Dennis P

A study of predeparture orientation programs for employees of business/industry and U.S. Agency for International Development projects

Creator:: Nelson, Dennis A.
Abstract:: The central purpose of this study was to identify the competencies of a predeparture orientation program as determined by business/industry personnel and personnel from institutions representing the U.S. Agency for International Development. An additional objective was to examine the organizational framework of existing predeparture programs to identify instructional methodologies, administrative...
Resource Type:: Dissertation
Full Text:: THESIS OF Dennis A. Nelson for the degree of Doctor of Education in Education presented on February 26

The Response and Effect of Emergent Coastal Vegetation to Sedimentation and the Distribution of Coastal Vegetation Communities along Environmental Gradients

Creator:: Lemein, Todd
Abstract:: Coastal marsh vegetation is an important component in maintaining marsh stability that is threatened by changes in sedimentation, sea level rise, natural and anthropogenic disturbances, and competition from invasive species. Vegetation has been demonstrated to reduce wave energy, increase sedimentation, and decrease erosion in tidal environments under a range of...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Dennis Albert Coastal marsh vegetation is an important component in maintaining marsh

Estuarine sediment controls on trace metal distributions

Creator:: Davies-Colley, Robert J.
Abstract:: Sediments are the major compartment in aquatic environments for many materials of toxic or nutrient concern. The lack of knowledge of the phase associations of toxic metals in sediments is the largest deficiency in our understanding of the environmental hazard posed by metal contamination. This study examined the sedimentary partitioning...
Resource Type:: Dissertation
Full Text:: DISTRIBUTIONS Abstract Approved: Redacted for Privacy Peter 0, Nelson, M.S., Ph.D. Sediments are the major

Multi-metal equilibrium sorption and transport modeling for copper, chromium, and arsenic in an iron oxide-coated sand, synthetic groundwater system

Creator:: Osathaphan, Khemarath
Abstract:: The mixed metal compound, Chromated Copper Arsenate, or CCA, has been widely used as a wood preservative. The metal ions in CCA, CrO²⁻₄, Cu²⁺, and AsO³⁻₄, have been found in contaminated surface and subsurface soils and groundwater nearby some wood preservative facilities and nearby wood structures. Iron oxides are a...
Resource Type:: Dissertation
Full Text:: , Synthetic Groundwater System Abstract approved: Peter 0. Nelson The mixed metal compound, Chromated

The effects of land use on stream nitrate concentrations : from the catchment scale to the regional scale

Creator:: Poor, Cara J.
Abstract:: This work furthers the understanding of processes occurring in catchments that affect stream nitrate concentrations using two different approaches: a temporally intensive case study of three headwater catchments with varying land use (through storm event monitoring) and a spatially intensive study on the regional scale (through statistical modeling) of 1st-4th...
Resource Type:: Dissertation
Full Text:: redacted for privacy. Abstract approved: _____ ~-~~~~~~---------- Peter 0. Nelson This work furthers

Removal of chromium, copper, and arsenic from contaminated grouNdwater using iron-oxide composite adsorbents

Creator:: Khaodhiar, Sutha
Resource Type:: Dissertation

Absorption of chlorophenols on granular activated carbon

Creator:: Yang, Maoyu
Abstract:: Studies were undertaken of the adsorption of chlorinated phenols from aqueous solution on granular activated carbon (Filtrasorb-400, 30x40 mesh). Single-component equilibrium adsorption data on the eight compounds in two concentration ranges at pH 7.0 fit the Langmuir equation better than the Freundlich equation. The adsorptive capacities at pH 7.0 increase...
Resource Type:: Dissertation

Experimental evaluation and chemical modeling of hexavalent chromium adsorption, desorption, and reduction in a natural soil

Creator:: Azizian, Mohammed F.
Abstract:: Chromium and its compounds are widely used by modern industries, resulting in large quantities of this element being discharged into the environment. To remove chromium from contaminated soils and ground water, it is necessary to predict chemical and physical processes that control the rate of reactions and transport of chromium...
Resource Type:: Dissertation

ScholarsArchive@OSU

Strontium isotopic and trace element geochemistry of the Saddle Mountains and Grande Rondé basalts of the Columbia River basalt group

Risk and the selection of alternative weed management technologies in Philippine upland rice production

A study of predeparture orientation programs for employees of business/industry and U.S. Agency for International Development projects

The Response and Effect of Emergent Coastal Vegetation to Sedimentation and the Distribution of Coastal Vegetation Communities along Environmental Gradients

Estuarine sediment controls on trace metal distributions

Multi-metal equilibrium sorption and transport modeling for copper, chromium, and arsenic in an iron oxide-coated sand, synthetic groundwater system

The effects of land use on stream nitrate concentrations : from the catchment scale to the regional scale

Removal of chromium, copper, and arsenic from contaminated grouNdwater using iron-oxide composite adsorbents

Absorption of chlorophenols on granular activated carbon

Experimental evaluation and chemical modeling of hexavalent chromium adsorption, desorption, and reduction in a natural soil

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