jp9b09642_si_001.pdf (312.61 kB)
Modulation Effects of Permanganate and Manganese(II) Ions on the Oscillatory Dynamics in a Bromate–Sulfite Reaction System
journal contribution
posted on 2020-01-13, 22:29 authored by Ling Yuan, Zhuoxuan Li, Mengfei Liu, Xiaoli Lv, Qingyu GaoIt is important to
study nonlinear dynamical systems showing pH
and temperature oscillations simultaneously. Here, we systematically
investigated the bromate–sulfite reaction in its coupled system.
Large-amplitude temperature oscillations could be measured accompanied
by the pH oscillations with or without permanganate and manganese(II)
ions. The modulation effects on the oscillatory dynamics of the bromate–sulfite
reaction system produced by permanganate and manganese(II) ions were
investigated in detail. On the one hand, with permanganate, an additional
negative pH feedback process between permanganate and bisulfite occurs,
leading to weakening the pH positive feedback. The above opposite
effects make the period length change unmonotonically when adjusting
the permanganate concentration and flow rate. On the other hand, with
Mn2+ as the feedback agent, the nonmonotonic change of
period was not obvious because it only contained one feedback loop,
which can only reinforce negative feedback without affecting positive
feedback.
History
Usage metrics
Categories
Keywords
pH oscillationspH feedback processstudy nonlineartemperature oscillationsflow ratemodulation effectsOscillatory Dynamicsfeedback loopperiod length change unmonotonicallyoscillatory dynamicsnonmonotonic changeModulation Effectsfeedback agentpermanganate concentrationLarge-amplitude temperature oscillations
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC