Progress in the development and use of ferrate(VI) salt as an oxidant and coagulant for water and wastewater treatment

Jiang, Jia‐Qian; Lloyd, B. J.

doi:10.1016/s0043-1354(01)00358-x

Cited by 478 publications

(307 citation statements)

References 63 publications

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“…The pH range of 7.0-10.0 was selected. It is noteworthy that at below pH 7, the reactions would be too rapid due to the instability of Fe(VI) [30,36]. Although the kinetic experiments were designed under pseudo-first-order conditions with Fe(VI) in excess to triclosan ([Fe(VI)] 0 = 15 × [triclosan] 0 , and [triclosan] 0 = 3 M), due to the decomposition of Fe(VI) at the setting pH, the concentration of Fe(VI) were not constant during reaction with triclosan.…”

Section: Kinetics For the Reaction Of Fe(vi) With Triclosanmentioning

confidence: 99%

Oxidation of triclosan by ferrate: Reaction kinetics, products identification and toxicity evaluation

Yang

Ying

Zhao

et al. 2011

Journal of Hazardous Materials

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Section: Kinetics For the Reaction Of Fe(vi) With Triclosanmentioning

confidence: 99%

Oxidation of triclosan by ferrate: Reaction kinetics, products identification and toxicity evaluation

Yang

Ying

Zhao

et al. 2011

Journal of Hazardous Materials

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“…+2.07 V and +1.24 V for ozone) (Wood, 1958). Thus the oxidation potential of potassium ferrate in acidic solution is the strongest of all the oxidants/disinfectants used in water and wastewater treatment, including chlorine, hypochlorite, chlorine dioxide, ozone, hydrogen peroxide, dissolved oxygen, and permanganate (Jiang and Lloyd, 2002). In addition, the ferric hydrolysis species including insoluble ferric hydroxide formed during ferrate oxidation are conventional coagulants, which mean that ferrate is a dual-function chemical reagent which has the potential to perform both oxidation and coagulation in a single treatment step (Deluca et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…Hence there is a continuing interest in the application of more efficient water treatment chemical reagents to achieve higher water quality. Fe(VI) in the form of potassium ferrate (K 2 FeO 4 ) has been found to be a powerful oxidant over a wide pH range and many studies have considered its role as an oxidant in water and wastewater treatment (Jiang and Lloyd, 2002). During the aqueous oxidation reaction, Fe(VI) is reduced to Fe(III) or an insoluble end-product, (Fe[OH] 3 ) (Sharma, 2002).…”

Section: Introductionmentioning

confidence: 99%

A study of the preparation and reactivity of potassium ferrate

2005

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In the context of water treatment, the ferrate ([FeO 4 ] 2-) ion has long been known for its strong oxidizing power and for producing a coagulant from its reduced form (i.e. Fe(III)). However, it has not been studied extensively owing to difficulties with its preparation and its instability in water. This paper describes an improved procedure for preparing solid phase potassium ferrate of high purity (99%) and with a high yield (50-70%). The characteristics of solid potassium ferrate were investigated and from XRD spectra it was found that samples of the solid have a tetrahedral structure with a space group of D 2h ( Pnma) and a = 7.705 Å, b = 5.863 Å, and c = 10.36 Å. The aqueous stability of potassium ferrate at various pH values and different concentrations was investigated. It was found that potassium ferrate solution had a maximum stability at pH 9-10 and that ferrate solution at low concentration (0.25 mM) was more stable than at high concentration (0.51 mM). The aqueous reaction of ferrate with bisphenol A (BPA), a known endocrine disrupter compound, was also investigated with a molar ratio of Fe(VI):BPA in the range of 1:1-5:1. The optimal pH for BPA degradation was 9.4, and at this pH and a Fe(VI):BPA molar ratio of 5:1, approximately 90% of the BPA was degraded after 60 s.

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“…">IntroductionFerrate(VI) (Fe(VI)) is an emerging environmentally friendly water treatment chemical due to its dual functions as an oxidant and a subsequent coagulant/precipitant as ferric hydroxide (Jiang and Lloyd, 2002;Sharma, 2002Sharma, , 2011Lee et al, 2004;Sharma et al, 2011). Fe(VI) can achieve a complete removal of various emerging organic micropollutants during water and wastewater treatment (Lee et al, 2009;Sharma, 2013).…”

mentioning

confidence: 99%