Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.iecr.0c04931
Title: Catalytic Oxidation of Trypan Blue Using Copper Complexes and Hydrogen Peroxide Shows a Negative Reaction Order
Authors: Ho, Wing Fat 
Le, Truc Nguyen 
Yang, Kun-Lin 
Keywords: Science & Technology
Technology
Engineering, Chemical
Engineering
Issue Date: 20-Jan-2021
Publisher: AMER CHEMICAL SOC
Citation: Ho, Wing Fat, Le, Truc Nguyen, Yang, Kun-Lin (2021-01-20). Catalytic Oxidation of Trypan Blue Using Copper Complexes and Hydrogen Peroxide Shows a Negative Reaction Order. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 60 (4) : 1576-1582. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.iecr.0c04931
Abstract: In most chemical reactions, reaction rates increase with increasing reactant concentrations. In this study, we report an unusual catalytic oxidation reaction with a negative reaction order, in which the reactant concentration inversely affected the oxidation rate. In the reaction, trypan blue was oxidized by hydrogen peroxide with copper-triglycine as a catalyst. Under a strong alkaline condition, the reaction rate was inversely proportional to the hydrogen peroxide concentration (i.e., the reaction rate was faster when the hydrogen peroxide concentration was lower). Without the copper-triglycine catalyst, the phenomenon did not happen. A possible explanation was that hydrogen peroxide competed with the reactive species of the catalyst and slowed down the reaction. This phenomenon had an important implication in advanced oxidation processes for wastewater treatments. To achieve a faster oxidation rate of trypan blue, one should add hydrogen peroxide slowly to keep its concentration low at all times. On the basis of this principle, we developed a continuous microdroplet injection process to deliver the hydrogen peroxide solution as droplets. This process was faster and more efficient than a batch process for the degradation of trypan blue.
Source Title: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
URI: https://scholarbank.nus.edu.sg/handle/10635/228624
ISSN: 0888-5885
1520-5045
DOI: 10.1021/acs.iecr.0c04931
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
catalytic oxidation of trypan blue uing copper complexes.pdfPublished version2.5 MBAdobe PDF

CLOSED

Published

SCOPUSTM   
Citations

4
checked on Nov 29, 2022

Page view(s)

45
checked on Nov 17, 2022

Download(s)

1
checked on Nov 17, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.