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Oscillatory Briggs-Rauscher Reaction as “Fingerprint” for Bentonite Identification: The Fine-Tuning of Oscillatory Dynamics with Addition of Clay

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2020
Authors
Pagnacco, Maja
Maksimović, Jelena
Mudrinić, Tihana
Banković, Predrag
Nedić-Vasiljević, Bojana
Milutinović Nikolić, Aleksandra
Article (Published version)
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Abstract
The oscillatory Briggs‐Rauscher (BR) reaction was applied on solid insoluble materials i. e. bentonite clays. Under the same BR experimental conditions, the addition of identical masses of bentonite of different origin resulted in different effects on oscillatory time duration (τ): no influence, quenching, or prolongation. It was found that the following bentonite properties: montmorillonite/beidellite ratio; cation exchange capacity; principal exchange cation; extent of iron leaching in acidic environment of BR reaction; and specific surface area of clay were not exclusively responsible for observed behavior. On the other hand, the influence of added mass, for all investigated clays, resulted in the same behavior pattern. The increase of the mass of added clay increased τ up to the certain maximal value (τmax, mmax) characteristic for each clay. Further increase of mass resulted in quenching. Therefore, (τmax, mmax) pair can be regarded as the “fingerprint” characteristic of bentonite... useful for identification of its origin. Furthermore, the addition of naturally occurring and non‐toxic clay in an oscillatory reaction can offer a versatile approach to tune the oscillation dynamics of nonlinear chemical systems.

Keywords:
Oscillatory Briggs‐Rauscher reaction / Bentonite clays / Oscillatory time duration / Oscillation dynamics / Nonlinear chemical systems
Source:
Chemistry Select, 2020, 5, 27, 8137-8141
Publisher:
  • Wiley
Projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-200146)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-200026)

DOI: 10.1002/slct.202000874

ISSN: 2365-6549

WoS: 000551242200013

Scopus: 2-s2.0-85088381217
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3616
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