Water Disinfection: Ferrate (VI) as the Greenest Chemical – A Review
Applied Engineering
Volume 3, Issue 2, December 2019, Pages: 171-180
Received: Nov. 15, 2019; Accepted: Nov. 29, 2019; Published: Dec. 6, 2019
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Djamel Ghernaout, Chemical Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia; Chemical Engineering Department, Faculty of Engineering, University of Blida, Blida, Algeria
Noureddine Elboughdiri, Chemical Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia; Chemical Engineering Department, Ecole Nationale d’Ingénieurs de Gabès (ENIG), Gabès, Tunisia
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Water shortage pushed water treatment specialists to search for green technology and chemicals for better drinking water quality. Based on iron, a healthy element, ferrate (VI) has known some successful applications through the lab-scale and industrial level. Simultaneously as a disinfectant, oxidant, and coagulant, this eco-friendly chemical merits more attention to enlarging its worldwide acceptance. This work focuses on its recent usages mainly as killing agent. During the last decade, an appreciable understanding has been summated mostly concerning synthesis, fresh rising microcontaminants, radionuclides, inorganic as well as organic contaminants and the pathway of ferrate role. During sewage remediation, literature established that ferrate (VI) is an outstanding oxidant and a coagulant; it decreased chemical oxygen demand by 30% while killing three orders of magnitude more bacteria than traditional chemicals. Ferrate (VI) injection conducted to algae elimination from lake water thanks to its binary features, i.e., as an oxidant and coagulant. Recent successful application of in-situ ferrate (VI) for enhanced seawater pretreatment promotes its large acceptance. As the greenest chemical used in water treatment, ferrate merits more interest in terms of laboratory research and large-scale application. However, technical problems related to preoxidation effects on decreasing coagulation efficiency and disinfection by-products problems remain to be first taken into account besides to its industrial preparation.
Ferrate, Wastewater Treatment, Drinking Water, Disinfection, Green Technology, Iron
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Djamel Ghernaout, Noureddine Elboughdiri, Water Disinfection: Ferrate (VI) as the Greenest Chemical – A Review, Applied Engineering. Vol. 3, No. 2, 2019, pp. 171-180. doi: 10.11648/j.ae.20190302.24
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