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Item Information   Holdings       More by this author     LeMieux, Jeramy W.     Subjects     Electrocoagulation -- Research.     Water -- Purification -- Chromium removal.     Electroplating -- Waste disposal     MSEV Project.     Browse Catalog     by author:      LeMieux, Jeramy W.       by title:      An investigation of ...         MARC Display

An investigation of an alternative technique for the removal of hexavalent chromium contaminants from a wastewater stream utilizing the process of electrocoagulation / by Jeramy W. LeMieux. by LeMieux, Jeramy W. Subjects Electrocoagulation -- Research.   Water -- Purification -- Chromium removal.   Electroplating -- Waste disposal   MSEV Project. Description:  61 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. Frank Mahuta. Committee members: Paul Boersma, Dr. William Gonwa. Wastewater overview -- Chemistry of hexavalent chromium -- Environmental concerns -- Health and safety concerns -- Overview of the chemical treatment approach -- Overview of zero-valent iron treatment approach -- Overview of the electrocoagulation treatment approach -- Factorial design for determining parameter significance -- Unit configuration -- Sampling strategy and test results -- Data analysis -- Bench scale test -- Unit configuration -- Sampling strategy and test results -- Data analysis -- Laboratory sampling analysis -- Electrocoagulation cost analysis -- A: Factorial design analysis -- B: 1st order reaction Mathematica notebook -- C: 2nd order reaction Mathematica notebook -- D: 3rd order reaction Mathematica notebook. The traditional method for removing hexavalent chromium contaminants from a wastewater is facilitated by the addition of numerous chemicals (e.g. Sulfuric Acid, Sodium Metabisulfite, and Lime). These chemicals and their byproducts post significant safety and operational concerns for the operators of the wastewater process. In addition, these concerns are overshadowed by the fact that the end product of the chemical treatment is Chromium Hydroxide, a material which is considered a hazardous waste. An alternative approach to chemical treatment is Electrocoagulation, an in situ method of generating ions through the process of electrolysis. This approach eliminates the need for hazardous feedstock chemicals and ultimately reduces the chromium contaminants to insoluble chromic oxide. This reduces overall environmental liabilities while reducing potential harm to workers operating the process. Results obtained through this experiment indicate that out of three factors, treatment time, applied voltage, and applied current, applied voltage has little or no impact on the rate of the reduction reaction. Conversely, treatment time and applied current are both significant contributors to the reaction rate and are also additive in their combined effects. Further analysis also indicates the reaction is governed by first-order kinetics with a rate constant of 0.16 min−1.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .L455 2003 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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