Ambient iron-mediated aeration (IMA) for water reuse

WATER RESEARCH

卷:47

Article

Deng, Yang^1,2  Englehardt, James D.¹  Abdul-Aziz, Samer^1,3  Bataille, Tristan^1,4  Cueto, Josenrique^1,5  De Leon, Omar^1,6  Wright, Mary E.¹  Gardinali, Piero^1,7  Narayanan, Aarthi^1,8  Polar, Jose^1,9  Tomoyuki, Shibata^1,10,11 

[1] Univ Miami, Dept Civil Architectural & Environm Engn, Coral Gables, FL 33124 USA

[2] Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA

[3] Zima Grp Int, Tripoli 1300, Lebanon

[4] Ecole Natl Travaux Publ Etat, Vaulx EnVelin, France

[5] Hazen & Sawyer PC, Coral Gables, FL 33134 USA

[6] ExxonMobil Dev Co, Environm & Regulatory Advisor, Houston, TX 77060 USA

[7] Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA

[8] Univ Florida, Particle Engn Res Ctr, Gainesville, FL 32611 USA

[9] ARCADIS US Inc, Tampa, FL 33637 USA

[10] No Illinois Univ, Publ Hlth Program, De Kalb, IL 60115 USA

[11] No Illinois Univ, Inst Study Environm Sustainabil & Energy, De Kalb, IL 60115 USA

关键词: Iron;    Dissolved oxygen;    Water reuse;    Oxidation;    Coagulation;    Adsorption;   

DOI  :  10.1016/j.watres.2012.11.005

来源: Elsevier

【 摘 要 】

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 (O-2) was continuously activated by zero-valent iron (Fe-0) 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, similar to 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 17 beta-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. (c) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

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