"This study was undertaken to investigate factors governing the release of pollutants from sediments and subsequent effects on water quality. Studies were carried out to: 1) determine the characteristics of selected sediments; 2) determine the level of release of pollutants under batch and fill and draw conditions; 3) determine the effect of temperature and pH on release mechanisms; 4) determine the importance of microbial (uninhibited) release and physio-chemical (inhibited) release processes.
The sediment utilized was from the Missouri River at Jefferson City, Missouri, and the Burgher Branch near Rolla, Missouri. Five environmental conditions to evaluate the effects of pH and temperature were observed using a pH of 6, 8, and 10 at 22°C and a pH of 8 at 5°C and 35°C. The physio-chemical (inhibited) release reactor bottles contained 1 gm/liter mercuric chloride to inhibit microbial growth and chemical oxygen demand (COD). Phosphorus and nitrogen were monitored in supernatant.
Research results indicated that the mechanisms of release of organics from sediments were mostly physiochemical in nature rather than due to microbial activity. Release mechanisms were found to be more pH dependent than temperature dependent. Increased pH brought about corresponding increases in organic release which may be explained in part by the increased dissociation of weak organic acids at higher pHs. Under test conditions used the pollutant release reached a nearly constant level in a matter of days"--Abstract, pages ii-iii.
Wixson, Bobby G.
Jennett, J. Charles
Gale, Nord L.
Civil, Architectural and Environmental Engineering
M.S. in Civil Engineering
Supported in part by United States. Environmental Protection Agency. Office of Water Programs
University of Missouri--Rolla
xi, 88 pages
Jefferson City (Mo.)
© 1973 Lloyd Aldon Hinkle, Jr., All rights reserved.
Thesis - Restricted Access
River sediments -- Missouri -- Analysis
Water quality -- Testing
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Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu/record=b1066662~S5
Hinkle, Lloyd Aldon Jr., "Release of pollutants from aquatic sediments" (1973). Masters Theses. 3570.
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