Biodegradation, sorption and transport of 2,4-D under saturated and unsaturated soil conditions

Persistent Link:
http://hdl.handle.net/10150/278212
Title:
Biodegradation, sorption and transport of 2,4-D under saturated and unsaturated soil conditions
Author:
Estrella Sanchez, Maria del Rocio, 1962-
Issue Date:
1992
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Researchers have traditionally viewed sorption, degradation and transport as separate processes and only recently have these processes viewed as coupled. 2,4-D was chosen as a model system to study the interaction between these processes. A series of laboratory batch and column experiments with a sandy loam soil were conducted to determine the relative contributions of sorption and degradation to transport of 2,4-D under both saturated and unsaturated conditions. The sorption contribution to 2,4-D transport was not significant under saturated (Kd = 0.249 mg/g) nor unsaturated conditions (Kd = 0.566 mg/g). Degradation however, was very significant, specially under unsaturated conditions where the estimated first order biodegradation rate (μ) constant was 4.39 d-1. Rate constants under the saturated transport experiment were restricted by oxygen limitations. There was an order of magnitude difference between μ of batch and column experiments which were attributed to differences in aeration and mixing conditions.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Biology, Microbiology.; Agriculture, General.; Environmental Sciences.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Miller, Raina M.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleBiodegradation, sorption and transport of 2,4-D under saturated and unsaturated soil conditionsen_US
dc.creatorEstrella Sanchez, Maria del Rocio, 1962-en_US
dc.contributor.authorEstrella Sanchez, Maria del Rocio, 1962-en_US
dc.date.issued1992en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractResearchers have traditionally viewed sorption, degradation and transport as separate processes and only recently have these processes viewed as coupled. 2,4-D was chosen as a model system to study the interaction between these processes. A series of laboratory batch and column experiments with a sandy loam soil were conducted to determine the relative contributions of sorption and degradation to transport of 2,4-D under both saturated and unsaturated conditions. The sorption contribution to 2,4-D transport was not significant under saturated (Kd = 0.249 mg/g) nor unsaturated conditions (Kd = 0.566 mg/g). Degradation however, was very significant, specially under unsaturated conditions where the estimated first order biodegradation rate (μ) constant was 4.39 d-1. Rate constants under the saturated transport experiment were restricted by oxygen limitations. There was an order of magnitude difference between μ of batch and column experiments which were attributed to differences in aeration and mixing conditions.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectBiology, Microbiology.en_US
dc.subjectAgriculture, General.en_US
dc.subjectEnvironmental Sciences.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMiller, Raina M.en_US
dc.identifier.proquest1350783en_US
dc.identifier.bibrecord.b25469745en_US
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