Portland State University. Department of Civil and Environmental Engineering
James F. Pankow
Date of Award
Master of Science (M.S.) in Civil & Environmental Engineering
Civil and Environmental Engineering
Cations, Chelates, Chelating agents, Water quality -- Measurement, Water-supply -- Testing, Heavy metals -- Environmental aspects
Cation sequestering compounds are contained in many industrial, commercial and personal care products. The most widely used chelating agents, EDTA and DTPA, are commonly found in natural and industrial settings. When chelating compounds are present, the activity and transport of metal cations in the environment and the uptake of metals in natural systems can be affected. Surface water samples from across the United States were analyzed, as well as local collection and analysis of surface waters and wastewater treatment plant effluent from around Northwest Oregon. Results indicate presence of synthetic chelating compounds in areas with human activity, and absence in areas that are less populated. As a stable and water soluble compound, monitoring for chelates could have potential use as an effective indicator of further anthropogenic effects.
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Hersey, Nathan A., "Occurrence of Synthetic Amino-Polycarboxylate Chelating Compounds in Oregon Surface Waters" (2014). Civil and Environmental Engineering Master's Project Reports. 3.