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Factors affecting the adsorption of heavy metals by activated sludge bacteria

Creator:: Conlin, Mary F.
Resource Type:: Masters Thesis
Full Text:: Metals by Activated Sludge Bacteria Abstract approved: Redacted for privacyPeter O. Nelson, M.S., Ph.D

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

Adsorption of hexavalent and trivalent chromium to a clayey silt soil : batch kinetic and equilibrium studies

Creator:: Bean, Gregory R.
Abstract:: Chromium, an element of widespread use, is toxic in some forms. Improper disposal of waste chromium products has resulted in contamination of many sites throughout the United States, including the United Chrome Products Superfund site in Corvallis, Oregon. A better understanding of chromium chemistry is needed to facilitate the remediation...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Redacted for Privacy Peter 0. Nelson Chromium, an element of widespread use, is toxic

Chromium (VI) sorption in soils : chemical behavior and solute transport modeling

Creator:: Schroth, Martin Herbert
Abstract:: Chromium spills on soils are causing severe groundwater contamination problems. To increase the performance of cleanup methods, the chemical behavior of chromium in soils and its transport through soils have to be understood. The objectives of this research were to investigate the sorption characteristics of chromium(VI) in soil and to...
Resource Type:: Masters Thesis
Full Text:: : Chemical Behavior and Solute Transport Modeling Abstract approved: Redacted for Privacy Peter 0. Nelson

Soil column desorption studies on a chromium contaminated soil

Creator:: Ball, Bruce L.
Abstract:: Soil column studies were performed on a chromium contaminated soil from the United Chrome Products Superfund Site currently undergoing a pump-and-treat cleanup process. The goal of the research was to provide insight into the feasibility of chemically changing the injection fluid of the pump-and-treat system to enhance hexavalent chromium (Cr(VI))...
Resource Type:: Masters Thesis
Full Text:: by: Bruce L. Ball ACKNOWLEDGEMENTS I would like to acknowledge Dr. Peter 0. Nelson, my major

Laboratory study of chromium sorption and desorption in undisturbed soil

Creator:: Müller, Heike K.
Resource Type:: Masters Thesis
Full Text:: Undisturbed Soil Abstract approved:, Redacted for Privacy Peter 0. Nelson The mobility of hexavalent

Oregon coastal lake study : phosphorus loading and water quality implications

Creator:: Blair, Michael Stuart
Abstract:: A study of phosphorus loading and water quality implications was conducted for the Oregon coastal lakes. The study was based on existing data for lake total phosphorus concentrations and for watershed land uses. A phosphorus mass-balance model was developed to predict lake total phosphorus concentrations from estimated phosphorus loading from...
Resource Type:: Masters Thesis
Full Text:: , 1993 Typed by Michael S. Blair ACKNOWLEDGEMENTS Professor Peter 0. Nelson, Department of Civil

Preparation and laboratory evaluation of stationary-phase iron-oxide-based adsorbents for removal of metals from waste waters

Creator:: May, Michael Lee
Abstract:: Several potential sorbent materials containing iron oxides were prepared and evaluated for potential to remove divalent metals from waste waters. These included a ferrihydrite-coated sand, maghemite incorporated in Dowex[Trademark] ion exchange resin, gothite and two thermally activated ferrihydrites. Attempts to prepare sorbents from steel shot by coating with ferrihydrite or...
Resource Type:: Masters Thesis
Full Text:: of Metals from Waste Waters Abstract approved: Peter 0 Nelson Several potential sorbent

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

ScholarsArchive@OSU

Factors affecting the adsorption of heavy metals by activated sludge bacteria

Estuarine sediment controls on trace metal distributions

Adsorption of hexavalent and trivalent chromium to a clayey silt soil : batch kinetic and equilibrium studies

Chromium (VI) sorption in soils : chemical behavior and solute transport modeling

Soil column desorption studies on a chromium contaminated soil

Laboratory study of chromium sorption and desorption in undisturbed soil

Oregon coastal lake study : phosphorus loading and water quality implications

Preparation and laboratory evaluation of stationary-phase iron-oxide-based adsorbents for removal of metals from waste waters

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

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