Leach models for risk-based characterization of stabilized/solidified wastes /
Performance characterization procedures based on leach models were developed for a risk assessment framework for stabilized/solidified (s/s) wastes that describes two limiting cases of contaminant leaching. The procedures mechanistically use chemical equilibrium models and/or numerical leach models...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=737704481&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Performance characterization procedures based on leach models were developed for a risk assessment framework for stabilized/solidified (s/s) wastes that describes two limiting cases of contaminant leaching. The procedures mechanistically use chemical equilibrium models and/or numerical leach models to characterize the s/s waste material. A chemical equilibrium model (SOLTEQ-B) was developed to predict the equilibrium concentrations of contaminants for the equilibrium-limited leaching. A numerical leach model coupled with SOLTEQ-B (SBLEM) was developed to obtain the observed diff-usivity values of contaminants for the kinetic-limited leaching case. The risk-based characterization procedures were evaluated systematically. First, SOLTEQ-B was evaluated using experimental data from bath equilibrium tests. Second, SBLEM was evaluated by simulating a dynamic leach test and by comparing predictions at the different bath conditions using experimental data of the same material for evaluation of SOLTEQ-B. Finally, the characterization procedure using these models was applied for the same material to demonstrate its effectiveness for risk assessments. |
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| Item Description: | Vita. "Major Subject: Civil Engineering". |
| Physical Description: | xiii, 192 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 128-134. |