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Transformation and fate of organic esters in layered-flow systems: the role of trace metal catalysis

Plastourgou, Marianna and Hoffmann, Michael R. (1984) Transformation and fate of organic esters in layered-flow systems: the role of trace metal catalysis. Environmental Science and Technology, 18 (10). pp. 756-764. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20150820-073727974

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Abstract

A simple mass transport model with chemical and biochemical reactions has been developed to predict the relative degree of degradation of organic esters in a layered-flow or density-stratified system. A numerical method was used to solve a system differential equations involved when metal-catalyzed hydrolysis, biodegradation, and adsorption were assumed to be major pathways for ester transformation. The relative importance of each pathway for the time-dependent concentration profiles of an organic ester was examined by use of dimensionless parameters given a known initial concentration profile across the depth of the water column for a catalyst, for a microbial population, for particles, and for a hypothetical ester. Both the ester and the catalyst were allowed to interdiffuse and to react. Results show that the characteristic times for metal-catalyzed ester hydrolyses alone are in the range of 6-700 days. These values depend strongly on initial concentration profiles, the magnitude of either the diffusion or dispersion coefficients, and the magnitude of the hydrolysis rate constant. Limitations of model applicability are discussed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/es00128a007DOIArticle
http://pubs.acs.org/doi/abs/10.1021/es00128a007PublisherArticle
ORCID:
AuthorORCID
Hoffmann, Michael R.0000-0002-0432-6564
Additional Information:© 1984 American Chemical Society. Received for review December 13, 1982. Revised manuscript received December 15, 1983. Accepted February 24, 1984. Publication Date: October 1984.
Issue or Number:10
Record Number:CaltechAUTHORS:20150820-073727974
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150820-073727974
Official Citation:Transformation and fate of organic esters in layered-flow systems: the role of trace metal catalysis Marianna. Plastourgou and Michael R. Hoffmann Environmental Science & Technology 1984 18 (10), 756-764 DOI: 10.1021/es00128a007
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59777
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:20 Aug 2015 15:54
Last Modified:03 Oct 2019 08:50

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