Index Catalog // ScholarsArchive@OSU

Evaluation of an automated respiration method used in assessing the toxicity of zinc on soil microorganisms

Creator:: Boening, Dean W.
Abstract:: Microorganisms can be a valuable tool in assessing the toxicity of heavy metals. The soil respiration rate is a commonly explored endpoint. I utilized a fully automated respirometer incorporating an infrared gas analyzer (IRGA) and developed a method for measuring the effect of Zn on soil microbial populations. Zinc, in...
Resource Type:: Masters Thesis
Full Text:: respiration inhibition is mediated by heavy metals at pH 2.0, regardless of the metal concentrations. Soil

The accumulation of cadmium, copper and nickel in freshwater mussels (Margaritifera margaritifera), algae (Cladophora sp.), and sediment from Elk Creek, Oregon

Creator:: Sigismondi, Linda A.
Abstract:: Concern about heavy metal pollution has increased during the past decade in which studies have shown that heavy metals are accumulating in the environment and that these metals, in excess, are toxic to organisms, including man. Because of this concern, scientists have suggested the use of indigenous organisms as monitors...
Resource Type:: Masters Thesis
Full Text:: , OREGON. Redacted for Privacy Abstract approved: Dr. Michael C. Mix Concern about heavy metal pollution

A microcomputer automated anodic stripping voltammetric analyzer for trace heavy metal speciation

Creator:: Dewald, Lamar Robert
Abstract:: An automated instrument based on a single-board microcomputer was developed for use in voltammetric analyses. Operator input of numerous experiment parameters allows any type of voltammetric analysis to be implemented and multiple scans to be run unattended. A three operational amplifier potentiostat is used to control the cell voltage and...
Resource Type:: Dissertation
Full Text:: analyzer for trace heavy metal speciation AN ABSTRACT OF THE THESIS OF Lamar Robert Dewald for the

Evaluating Biochar for the Sustainable Treatment of Heavy Metals in Stormwater: Characteristics, Mechanisms, and Barriers

Creator:: Burch, Sarah
Abstract:: Heavy metals, such as copper, zinc, and cadmium, are ubiquitous in stormwater and potentially toxic to aquatic organisms at low concentrations. Removal of heavy metals contamination by conventional treatment is expensive and does not always reduce metals concentrations low enough to ensure safety of all aquatic species. This research seeks...
Resource Type:: Dissertation
Full Text:: presented on August 31, 2018. Title: Evaluating Biochar for the Sustainable Treatment of Heavy Metals in

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:: , 1971). Many heavy metal sulphides are extremely insoluble and iron and manganese, while more soluble

The mobilization of heavy metals from contaminated soil using low molecular weight organic acids

Creator:: Kang, Sun Ki
Abstract:: More than 30,000 potential Superfund sites have been identified. Heavy metals are contaminants at many of these Superfund sites. The average cost of cleanup a single-typical Superfund site currently stands at $20 million, and it is expected that the cost may escalate to $50 million within the next decade. Problems...
Resource Type:: Dissertation
Full Text:: amounts of heavy metals (Cu, Pb, Zn) were removed and formed soluble metal-organic complexes at higher

A photoactivable microfluidic device for heavy metal ion extraction

Creator:: Nammoonnoy, Jintana
Abstract:: The development of microfluidic devices for heavy metal extraction is presented in this dissertation. Various research areas, covering subjects from photochromic compound syntheses to microchip fabrication techniques are explored to develop microfluidic devices capable of extracting heavy metal ions from drinking water. Through integration of the beneficial characteristics of both...
Resource Type:: Dissertation
Full Text:: Photoactivable Microfluidic Device for Heavy Metal Ion Extraction Abstract approved

Estuarine sediment controls on trace metal distributions

Creator:: Davies-Colley, R. J., Nelson, Peter O., and Williamson, Kenneth J.
Resource Type:: Technical Report
Full Text:: the estuarine water (Berner , 1969, 1971) . Many heavy metal sulphides are extremely insoluble an d

Preliminary study on the effect of pH on the treatment of lead contaminated wastewaters with ozone

Creator:: Adolf, Ronald L.
Abstract:: Ozone was found to quickly reduce the concentration of lead in a prepared solution when the solution pH of said solution was greater than 7.0. When a solution having a pH of greater than 7.0 was filtered the concentration of lead was less than approximately 1.0 ppm. 1.0 ppm is...
Resource Type:: Masters Thesis
Full Text:: levels well below the acceptable Federal limits. Today, with growing concerns of heavy metal

Remediation of heavy-metal contaminated soils using succinic acid

Creator:: Kaul, Arvind
Abstract:: Succinic acid, a low molecular weight dicarboxylic acid was used to leach out heavy metals from Willamette Valley soil (contaminated separately with lead, copper, and zinc) in form of water-soluble organo-metal complexes. The research tasks included developing synthetic contaminated soils representative of those found at Superfund sites and making heavy...
Resource Type:: Masters Thesis
Full Text:: Remediation of Heavy-Metal Contaminated Soils Using

ScholarsArchive@OSU

Evaluation of an automated respiration method used in assessing the toxicity of zinc on soil microorganisms

The accumulation of cadmium, copper and nickel in freshwater mussels (Margaritifera margaritifera), algae (Cladophora sp.), and sediment from Elk Creek, Oregon

A microcomputer automated anodic stripping voltammetric analyzer for trace heavy metal speciation

Evaluating Biochar for the Sustainable Treatment of Heavy Metals in Stormwater: Characteristics, Mechanisms, and Barriers

Estuarine sediment controls on trace metal distributions

The mobilization of heavy metals from contaminated soil using low molecular weight organic acids

A photoactivable microfluidic device for heavy metal ion extraction

Estuarine sediment controls on trace metal distributions

Preliminary study on the effect of pH on the treatment of lead contaminated wastewaters with ozone

Remediation of heavy-metal contaminated soils using succinic acid

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