Masters Theses

Abstract

"The uptake of nitroaromatic compounds by three surface soils at the Weldon Spring Training Area (WSTA) was investigated in batch tests. The removal of 2,4-dinitrotoluene (2,4-DNT) and 2,6-dinitrotoluene (2,6-DNT) by the soils was rapid. Over 90 % of the total DNT uptake occurred within 1 hr. The uptake of 2,4-DNT by the soils was greater than that of 2,6-DNT by an average of 15 %. The uptake of DNT by the soils was best described by the Freundlich isotherm. The uptake of DNT correlated most positively with soil total organic carbon (TOC) content. As the TOC content of the soils decreased, the uptake of DNT by the soils also decreased. No competitive uptake was observed between 2,4- and 2,6-DNT by the soils over the concentration range studied. Based on linear isotherm Kd values, DNT has a low to intermediate mobility potential in the WSTA surface soils.

The uptake of 2,4,6-trinitrotoluene (TNT), 2,4- and 2,6-DNT by two subsurface soils at the Weldon Spring Chemical Plant (WSCP) was investigated in batch tests, and the uptake of TNT by the soils was the greatest, followed by 2,4-DNT and 2,6-DNT. On an average, the uptake of TNT was 16 and 28 % more than 2,4- and 2,6-DNT, respectively. The subsurface WSCP soils have a very limited uptake capacity for nitroaromatics compared to the high TOC content surface soils from WSTA. The nitroaromatics are more mobile in the subsurface soils than in the surface soils.

The amount and rate of leaching of nitroaromatics from contaminated surface soils at WSTA was investigated. The amount of TNT leached after 1 hr. was nearly identical to that leached after 120 hr. On an average, 2,4- and 2,6-DNT leached more than TNT from the WSTA surface soils"--Abstract, page iii.

Advisor(s)

TerKonda, Purush

Committee Member(s)

Modesitt, Donald E.
Elifrits, C. Dale

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Sponsor(s)

Geological Survey (U.S.)

Comments

The project was partially supported by funding from the Water Resources Division, U.S. Geological Survey, Rolla, Missouri.

Publisher

University of Missouri--Rolla

Publication Date

Fall 1992

Pagination

viii, 72 pages

Note about bibliography

Includes bibliographical references (pages 69-71).

Geographic Coverage

Weldon Spring, Missouri

Rights

© 1992 Steven Albert Fink, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Nitroaromatic compounds -- BiodegradationNitroaromatic compounds -- Environmental aspectsSoils -- Missouri -- Weldon Spring -- Testing

Thesis Number

T 6495

Print OCLC #

27865102

Electronic OCLC #

962855142

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