Wastewater disinfection and organic matter removal using ferrate (VI) oxidation

Bandala, Erick R.; Miranda, J.M. De; Beltrán, Margarita; Vaca, Mabel; López, Rosa María Tejero; Torres, Luis G.

doi:10.2166/wh.2009.003

Cited by 20 publications

(7 citation statements)

References 44 publications

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“…Nowadays, water scarcity is a global problem. It has been reported that 1.2 billion people worldwide have no access to sanitary potable water (1,2). Collection and treatment of wastewater is a suitable way to prepare water needed for agriculture and industry.…”

Section: Introductionmentioning

confidence: 99%

Removal of H2S and COD Using UV, Ferrate and UV/Ferrate from Municipal Wastewater

Talaiekhozani¹,

Eskandari²,

Bagheri³

et al. 2016

J. Hum. Environ. Health Promot.

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Journal homepage: www.zums.ac.ir/jhehp Background: The aim of this study is to compare UV, ferrate (VI) and UV/ferrate (VI) methods for removal of hydrogen sulfide and chemical oxygen demand (COD) from municipal wastewater under a continuous condition. Methods: The experiment was divided into three parts: 1) pollutants removal by using ferrate (VI) alone; 2) pollutants removal using UV alone; 3) pollutants removal using a combination of UV/ferrate (VI). The electrolysis process was utilized to generate ferrate (VI). Results: The results showed that UV had the highest pollutants removal, so that 89% and 85% of hydrogen sulfide and COD were removed from the wastewater, respectively. UV/ferrate (VI) ranked as the next most efficient method. This method removed 65% and 73% of hydrogen sulfide and COD, respectively from the wastewater. Conclusion: Using ferrate (VI) alone had the lowest pollutant removal efficiency, with 41% and 48% of hydrogen sulfide and COD removal from wastewater, respectively. UV has a higher ability to remove hydrogen sulfide and COD from wastewater, compared with UV/ferrate (VI) and ferrate (VI) alone.

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Section: Introductionmentioning

confidence: 99%

Removal of H2S and COD Using UV, Ferrate and UV/Ferrate from Municipal Wastewater

Talaiekhozani¹,

Eskandari²,

Bagheri³

et al. 2016

J. Hum. Environ. Health Promot.

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Section: Employing Ferrate As Disinfectantmentioning

confidence: 99%

“…In tertiary treated wastewater [35]- [41], big-scale ferrate disinfection has been mentioned to together eliminate total organic carbon (TOC) and pathogens from water ( Figure 3) [9] [42]. A configuration was suggested to support coagulation besides the oxidation reaction thanks to its reduction potential, as illustrated in Equations (3) and (4) [42]: Figure 3(a) illustrates the findings acquired for TOC elimination employing Fe(VI) contrasted with employing hypochlorite as a traditional oxidizer. As displayed, TOC elimination was a fair function of the oxidant concentration and a more important ferrate concentration conducted to a more elevated TOC decrease, perhaps due to the concurrent presence of ferrate-formed coagulation and an oxidative/reductive process [16] [42].…”

Section: Employing Ferrate As Disinfectantmentioning

confidence: 99%

“…A configuration was suggested to support coagulation besides the oxidation reaction thanks to its reduction potential, as illustrated in Equations (3) and (4) [42]: Figure 3(a) illustrates the findings acquired for TOC elimination employing Fe(VI) contrasted with employing hypochlorite as a traditional oxidizer. As displayed, TOC elimination was a fair function of the oxidant concentration and a more important ferrate concentration conducted to a more elevated TOC decrease, perhaps due to the concurrent presence of ferrate-formed coagulation and an oxidative/reductive process [16] [42]. The more elevated TOC elimination was attained employing 14 mg/L of ferrate (like 48% TOC decrease) following one hour of reaction, while less than half of the TOC was eliminated employing the identical reaction circumstances for chlorine.…”

Section: Employing Ferrate As Disinfectantmentioning

confidence: 99%

“…Simultaneous removal of TOC (a) and total and fecal coliforms (b) in wastewater using ferrate (circles) and hypochlorite (triangles)[42].…”

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Mechanistic Insight into Disinfection Using Ferrate(VI)

Ghernaout¹,

Elboughdiri²

2019

OALib

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Disinfection, chemical oxidation, and coagulation are key methods in water treatment. A chemical that may be used for all these targets is ferrate(VI). This work tries to bring some light into mechanisms implied throughout killing microbes using ferrate(VI). In acidic pH, the oxidation and reduction capacity of ferrate(VI) is superior to all currently utilized oxidizers and disinfectants in water and wastewater treatment. The technology of using ferrate(VI) for coagulation, chemical oxidation and disinfection of water and wastewater in a reactor simultaneously, can reduce the size of water and wastewater treatment plants and increase the treatment efficiency. Ferrate(VI) allows a novel emergency water treatment design for disaster-affected populations through the repercussions of natural disasters, through the concurrent and efficient elimination of microbial and chemical pollutants. The ferrates' elevated performance and utilization as a green element for water treatment propose that these techniques remain greatly convenient for usage as pre-or post-treatment in traditional wastewater plants. It seems that there is no big difference in terms of ferrate's action on pathogens with other chemical disinfectants. However, ferrate was found to be requiring lower needed doses as compared with other chemicals. More researches on disinfection by-products formation following ferrate injection as a disinfectant are required. Finally, ferrate(VI) deserves more attention to be used more largely through worldwide wastewater treatment plants.

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