Frontiers of Chemical Science and Engineering
>> 2009,
Volume 3,
Issue 1
doi:
10.1007/s11705-009-0098-4
RESEARCH ARTICLE
Modeling the aqueous reaction kinetics of estriol with ferrate
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Available online: 2009-03-05
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Abstract
In this study the aqueous oxidation kinetics of estriol (E3) by potassium ferrate (K FeO ), a chemical for its strong oxidizing power and for producing a coagulant from its reduced state (i.e. Fe(III)), was evaluated in the range of pH 8-12 with different molar ratios of the reactants. As the degree of Fe(VI) protonation varies with the solution pH, it was found that a first order model was not suitable to describe the oxidation reaction. This paper describes a theoretical representation that closely models the reaction kinetics of E3 and ferrate. From this modeling, the reaction rates of HFe and Fe with E3 have been determined. The results show that the reactivity of HFe with dissociated and undissociated E3 is greater than that of Fe , and that E3 is more reactive in its dissociated state.
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