Title page for ETD etd-04182009-041317


Type of Document Master's Thesis
Author Hurst, Gregory H.
URN etd-04182009-041317
Title Evaluation of the use of ferrous iron for chlorite removal under alkaline pH conditions
Degree Master of Science
Department Environmental Engineering
Advisory Committee
Advisor Name Title
Knocke, William R. Committee Chair
Dietrich, Andrea M. Committee Member
Little, John C. Committee Member
Keywords
  • Iron
Date of Defense 1994-09-14
Availability restricted
Abstract
Chlorine dioxide has gained much attention for use as a possible alternative disinfectant in water treatment plants due to concerns regarding trihalomethane formation in drinking waters which utilize chlorine as the primary disinfectant and the strict regulations regarding THM's and THMFP (MCL of 0.080 mg/L for TTHMs) (Pontius, 1993). Although the use of Cl02 as a disinfectant prevents the formation of THM's, concern exists regarding the potential health risks due to the disinfection-by-products of chlorite and chlorate. T

he main objective of this project was to study the removal of chlorite by reaction with ferrous iron under elevated pH conditions. The stoichiometry of the reaction was evaluated under the following conditions: solution pH of 6.0 to 10.0, 02(aq) concentration of 0.5 to 10 mg/L, and solution DOC concentrations of 0 to 15 mg/L. Mass balances were conducted to define the speciation of the oxychlorine residuals associated with the reduction of Cl02 by Fe(II).

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