Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Engineering
Electrocoagulation As A Pretreatment For Electroxidation Of E. Coli, William Lynn, Joe Heffron, Brooke Mayer
Electrocoagulation As A Pretreatment For Electroxidation Of E. Coli, William Lynn, Joe Heffron, Brooke Mayer
Civil and Environmental Engineering Faculty Research and Publications
Insufficient funding and operator training, logistics of chemical transport, and variable source water quality can pose challenges for small drinking water treatment systems. Portable, robust electrochemical processes may offer a strategy to address these challenges. In this study, electrocoagulation (EC) and electrooxidation (EO) were investigated using two model surface waters and two model groundwaters to determine the efficacy of sequential EC-EO for mitigating Escherichia coli. EO alone (1.67 mA/cm2, 1 min) provided 0.03 to 3.9 logs mitigation in the four model waters. EC alone (10 mA/cm2, 5 min) achieved ≥1 log E. coli mitigation in all …
Sequential Electrocoagulation-Electrooxidation For Virus Mitigation In Drinking Water, Joe Heffron, Donald R. Ryan, Brooke K. Mayer
Sequential Electrocoagulation-Electrooxidation For Virus Mitigation In Drinking Water, Joe Heffron, Donald R. Ryan, Brooke K. Mayer
Civil and Environmental Engineering Faculty Research and Publications
Electrochemical water treatment is a promising alternative for small-scale and remote water systems that lack operational capacity or convenient access to reagents for chemical coagulation and disinfection. In this study, the mitigation of viruses was investigated using electrocoagulation as a pretreatment prior to electrooxidation treatment using boron-doped diamond electrodes. This research is the first to investigate a sequential electrocoagulation-electrooxidation treatment system for virus removal. Bench-scale, batch reactors were used to evaluate mitigation of viruses in variable water quality via: a) electrooxidation, and b) a sequential electrocoagulation-electrooxidation treatment train. Electrooxidation of two bacteriophages, MS2 and ΦX174, was inhibited by natural organic …
Analysis Of Operational Parameters, Reactor Kinetics, And Floc Characterization For The Removal Of Estrogens Via Electrocoagulation, Emily K. Maher, Kassidy N. O'Malley, Joe Heffron, Jingwan Huo, Brooke K. Mayer, Yin Wang, Patrick J. Mcnamara
Analysis Of Operational Parameters, Reactor Kinetics, And Floc Characterization For The Removal Of Estrogens Via Electrocoagulation, Emily K. Maher, Kassidy N. O'Malley, Joe Heffron, Jingwan Huo, Brooke K. Mayer, Yin Wang, Patrick J. Mcnamara
Civil and Environmental Engineering Faculty Research and Publications
Estrogenic compounds can cause human and ecological health issues and have been detected in surface and drinking water. In this research a reactor analysis determined the impact of operational parameters, the best fit kinetic model for the removal of estrone (E1), 17β-estradiol (E2), estriol (E3), and 17α-ethynylestradiol (EE2) using a bench-top iron electrocoagulation reactor, and characterized the floc generated in-situ. The parameters investigated were current density, conductivity, stir rate, and polarity reversal. Estrogen removal correlated well with an increase in current density, while conductivity did not impact removal but did reduce potentials. High stir rates and frequent polarity reversal …