Assessing the Role of Landfill Liners and Organic Matter on the Reductive Dissolution of Iron under Anaerobic Conditions

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Material Information

Title:
Assessing the Role of Landfill Liners and Organic Matter on the Reductive Dissolution of Iron under Anaerobic Conditions
Physical Description:
1 online resource (68 p.)
Language:
english
Creator:
O'Donnell, Amanda M
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Master's ( M.E.)
Degree Grantor:
University of Florida
Degree Disciplines:
Environmental Engineering Sciences
Committee Chair:
TOWNSEND,TIMOTHY G
Committee Co-Chair:
ANNABLE,MICHAEL D
Committee Members:
BONZONGO,JEAN-CLAUDE J

Subjects

Subjects / Keywords:
iron -- landfills -- reduction
Environmental Engineering Sciences -- Dissertations, Academic -- UF
Genre:
Environmental Engineering Sciences thesis, M.E.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Concentrations of iron (Fe) exceeding the secondarydrinking water standard1 of 0.3 mg/L andFlorida’s health-based standard2 of 4.2mg/L, havebeen detected in groundwater monitoring wells surrounding Floridalandfills.  Examination into the elevatedlevels has recognized reductive dissolution of naturally-occurring iron oxidesin the soil as a principal mechanism. The first study considered whether a landfillliner alone could facilitate reduction of ferric iron (Fe(III)) by creatingreducing conditions. A 2.1-acre Class I MSW landfill “test” liner was installedat a site in Florida. Groundwater and soil gas monitoring, before and afterliner placement, were used to indicate variation in redox chemistry andselected parameters. Although reducing conditions were apparent following linerinstallation, indicated by a drop in dissolved oxygen and ORP, these conditionswere not sustained.  Fe(II) concentrations,before and after liner installation, were not significantly different(P A second study aimed at identifying the role of organicmatter, soil type, and microbial activity on the reductive dissolution of Fe(III)was carried out by running soil-leachate batch test. Soils collected from fiveFlorida landfills, with documented elevated Fe(II) levels, were combined withseven different leachate types of varying organic matter compositions. Younglandfill leachate showed the highest increase in Fe(II) compared to theDI-control. Results suggest that perhaps the organic matter makeup of young MSWlandfill leachate could be a main driver in the reductive dissolution of Fe(III).
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Amanda M O'Donnell.
Thesis:
Thesis (M.E.)--University of Florida, 2013.
Local:
Adviser: TOWNSEND,TIMOTHY G.
Local:
Co-adviser: ANNABLE,MICHAEL D.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2015-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046425:00001