Masters Theses


"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.

Committee Member(s)

Jennett, J. Charles
Gale, Nord L.


Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering


Supported in part by United States. Environmental Protection Agency. Office of Water Programs


This investigation was supported in part by Professional Training Grant No. 1P2-WP-278-01 and T-900.21 from the Office of Water Programs, Environmental Protection Agency.


University of Missouri--Rolla

Publication Date



xi, 88 pages

Note about bibliography

Includes bibliographical references (pages 86-87).

Geographic Coverage

Jefferson City (Mo.)
Rolla (Mo.)


© 1973 Lloyd Aldon Hinkle, Jr., All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Subject Headings

River sediments -- Missouri -- Analysis
Contaminated sediments
Water quality -- Testing

Thesis Number

T 2886

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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