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FEASIBILITY OF IN-SITU REMOVAL OF HEAVY METALS BY ELECTROREMEDIATION OF OFFSHORE MUDS
by
Muhammad Haroun
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ENVIRONMENTAL ENGINEERING)
August 2009
Copyright 2009 Muhammad Haroun
Object Description
| Title | Feasibility of in-situ removal of heavy metals by electroremediation of offshore muds |
| Author | Haroun, Muhammad |
| Author email | haroun@usc.edu; haroun.muhammad@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Environmental Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2009-06-22 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-08-09 |
| Advisor (committee chair) |
Meshkati, Najmedin Chilingar, George |
| Advisor (committee member) |
Ershaghi, Iraj Pamukcu, Sibel |
| Abstract | The present experimental work is directed towards investigation of the electokinetically-enhanced transport of soil contaminants (specifically heavy metals) in clay media and offshore muds.; The electrokinetic process is an emerging technology for in-situ soil decontamination, in which chemical species, both ionic and nonionic, are transported to electrode sites in soil. Electrokinetics refers to movement of water, ions and charged particles relative to one another under the action of an applied direct current electric field. In a porous compact matrix of surface-charged particles such as soil, the pore fluid containing ions are made to flow to the collection sites under the applied electric field (Pamukcu et al., 1993).; Remediation of anthropogenically contaminated clay-soil media were conducted by Dr. Pamukcu at Lehigh University. Experiments of high concentrations of heavy metals in clay-soil media were conducted at the University of Southern California by the writer. Water containing acids were used for pH control.; The EK tests were performed for 24 hrs, and the initial and final concentrations were analyzed using an ICP-MS equipment. The removal efficiency, initial and final pH of slurry at 3 positions was recorded.; The effectiveness of the process demonstrated that up to 99% of initial concentrations of metals can be removed from soil. In this process, the pH and contaminant type was found to influence the removal rather than the electroosmotic flow. In the absence of pH control mechanisms, the basic conditions developed at the cathode, causing most of the metals to precipitate near the cathode as carbonates and hydroxides. pH adjustment at the cathode appeared to minimize such precipitation and to enhance the removal of some heavy metals.; Applicability of this electrokinetic technology in remediating offshore muds from heavy metals was not evaluated to date. Tests were made using 22 different offshore mud samples from different locations in Abu Dhabi, U.A.E., contaminated with 29 different heavy metals. The experimental work was performed by the writer at the newly-established Electrokinetic laboratories at the Petroleum Institute in Abu Dhabi, U.A.E. In the process it was determined that D.C. current can be used to decontaminate the offshore muds from heavy metals. |
| Keyword | electroremediation; offshore; offshore muds; electrokientics; heavy metals; decontamination; Abu Dhabi; in-situ; in-situ decontamination; in-situ electroremediation |
| Geographic subject (city or populated place) | Abu Dhabi |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2558 |
| Contributing entity | University of Southern California |
| Rights | Haroun, Muhammad |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Haroun-3123 |
| Archival file | uscthesesreloadpub_Volume48/etd-Haroun-3123.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | FEASIBILITY OF IN-SITU REMOVAL OF HEAVY METALS BY ELECTROREMEDIATION OF OFFSHORE MUDS by Muhammad Haroun A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ENVIRONMENTAL ENGINEERING) August 2009 Copyright 2009 Muhammad Haroun |
