TY - JOUR
T1 - Ambient iron-mediated aeration (IMA) for water reuse
AU - Deng, Yang
AU - Englehardt, James D.
AU - Abdul-Aziz, Samer
AU - Bataille, Tristan
AU - Cueto, Josenrique
AU - De Leon, Omar
AU - Wright, Mary E.
AU - Gardinali, Piero
AU - Narayanan, Aarthi
AU - Polar, Jose
AU - Tomoyuki, Shibata
N1 - Funding Information:
Joel Mognol, Yves Legrenzi, Tommy Kiger, Erik Gadzinski, Patrick Kelly, Andrew Silverman, Felipe Behrens, Amir Zahir, and Bader Alessa are greatly appreciated for their IMA experiments at University of Miami. Special thanks to Mr. Doug Wachter (Vice President, Parkson Corporation, Ft. Lauderdale, FL) for analysis of total phosphorus. The National Science Foundation and the U.S. Environmental Protection Agency , NSF Award ID 1038257 , and the University of Miami are gratefully acknowledged for partial support of this work.
PY - 2013/2/1
Y1 - 2013/2/1
N2 - Global water shortages caused by rapidly expanding population, escalating water consumption, and dwindling water reserves have rendered water reuse a strategically significant approach to meet current and future water demand. This study is the first to our knowledge to evaluate the technical feasibility of iron-mediated aeration (IMA), an innovative, potentially economical, holistic, oxidizing co-precipitation process operating at room temperature, atmospheric pressure, and neutral pH, for water reuse. In the IMA process, dissolved oxygen (O2) was continuously activated by zero-valent iron (Fe0) to produce reactive oxygen species (ROS) at ambient pH, temperature, and pressure. Concurrently, iron sludge was generated as a result of iron corrosion. Bench-scale tests were conducted to study the performance of IMA for treatment of secondary effluent, natural surface water, and simulated contaminated water. The following removal efficiencies were achieved: 82.2% glyoxylic acid, ∼100% formaldehyde as an oxidation product of glyoxylic acid, 94% of Ca2+ and associated alkalinity, 44% of chemical oxygen demand (COD), 26% of electrical conductivity (EC), 98% of di-n-butyl phthalate (DBP), 80% of 17β-estradiol (E2), 45% of total nitrogen (TN), 96% of total phosphorus (TP), 99.8% of total Cr, >90% of total Ni, 99% of color, 3.2 log removal of total coliform, and 2.4 log removal of E. Coli. Removal was attributed principally to chemical oxidation, precipitation, co-precipitation, coagulation, adsorption, and air stripping concurrently occurring during the IMA treatment. Results suggest that IMA is a promising treatment technology for water reuse.
AB - Global water shortages caused by rapidly expanding population, escalating water consumption, and dwindling water reserves have rendered water reuse a strategically significant approach to meet current and future water demand. This study is the first to our knowledge to evaluate the technical feasibility of iron-mediated aeration (IMA), an innovative, potentially economical, holistic, oxidizing co-precipitation process operating at room temperature, atmospheric pressure, and neutral pH, for water reuse. In the IMA process, dissolved oxygen (O2) was continuously activated by zero-valent iron (Fe0) to produce reactive oxygen species (ROS) at ambient pH, temperature, and pressure. Concurrently, iron sludge was generated as a result of iron corrosion. Bench-scale tests were conducted to study the performance of IMA for treatment of secondary effluent, natural surface water, and simulated contaminated water. The following removal efficiencies were achieved: 82.2% glyoxylic acid, ∼100% formaldehyde as an oxidation product of glyoxylic acid, 94% of Ca2+ and associated alkalinity, 44% of chemical oxygen demand (COD), 26% of electrical conductivity (EC), 98% of di-n-butyl phthalate (DBP), 80% of 17β-estradiol (E2), 45% of total nitrogen (TN), 96% of total phosphorus (TP), 99.8% of total Cr, >90% of total Ni, 99% of color, 3.2 log removal of total coliform, and 2.4 log removal of E. Coli. Removal was attributed principally to chemical oxidation, precipitation, co-precipitation, coagulation, adsorption, and air stripping concurrently occurring during the IMA treatment. Results suggest that IMA is a promising treatment technology for water reuse.
KW - Adsorption
KW - Coagulation
KW - Dissolved oxygen
KW - Iron
KW - Oxidation
KW - Water reuse
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U2 - 10.1016/j.watres.2012.11.005
DO - 10.1016/j.watres.2012.11.005
M3 - Article
C2 - 23232032
AN - SCOPUS:84871497395
VL - 47
SP - 850
EP - 858
JO - Water Research
JF - Water Research
SN - 0043-1354
IS - 2
ER -