Abstract
Aqueous solutions of Rhodamine 6G (R6G), one of the more used xanthene dye, were treated by hydroxyl radicals ( · OH) electrocatalytically generated through the electro-Fenton process, a powerful and environmentally friendly electrochemical method. Platinum (Pt) or boron-doped diamond (BDD) anodes were used with a carbon-felt cathode. The effect of anode nature and applied current on the degradation and mineralization kinetics was investigated. The applied current value of 500 mA was found as optimum operating parameter for both anodes under our operating conditions. Kinetic data of R6G disappearance follow the pseudo-first order reaction decay process. The rate constant of the oxidation reaction between R6G and hydroxyl radicals was determined by competition kinetics method and found as 3.41 x 109 M-1 s-1. The mineralization efficiency was found very high with both anodes reaching 99% and 98% for BDD and Pt respectively at 500 mA. Oxalic acid was identified as ultimate end-product before complete mineralization. The two secondary amine groups of R6G were converted mainly into NH4 + ions whereas NO3 - ions are released to the solution at relatively low proportion.
Keywords: Rhodamine 6G, Advanced oxidation process, Hydroxyl radical, Boron-doped diamond, Electro-Fenton process, Mineralization, xanthene dye, carcinogenic, anaerobic, recalcitrant.
Call for Papers in Thematic Issues
Advances of Heterocyclic Chemistry with Pesticide Activity
Global food safety and security will continue to be a global concern for the next 50 years and beyond. Plant diseases have had a significant impact on food safety and security throughout the entire food chain, from primary production to consumption. While conventional chemical pesticides have been traditionally used for ...read more
Calculation design of covalent/metal organic framework based catalysts
This research area combines theoretical computation and screening with machine learning for the design of covalent/metal organic framework-based catalysts, bridging the disciplines of organic chemistry, physical chemistry, computational chemistry, materials science, and machine learning. It covers several critical aspects: designing and synthesizing organic catalysts for improved performance, applying computational methods ...read more
Carbohydrates conversion in biofuels and bioproducts
Biomass pretreatment, hydrolysis, and saccharification of carbohydrates, and sugars bioconversion in biofuels and bioproducts within a biorefinery framework. Carbohydrates derived from woody biomass, agricultural wastes, algae, sewage sludge, or any other lignocellulosic feedstock are included in this issue. Simulation, techno-economic analysis, and life cycle analysis of a biorefinery process are ...read more
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
Related Books
Advances in Organic Synthesis
The Synthetic Methods, Structures, and Properties of the Ca-C σ Bond Organocalcium Containing Compounds
Advances in Organic Synthesis
Chemistry of Bipyrazoles: Synthesis and Applications
Advances in Organic Synthesis
Advanced Nanocatalysis for Organic Synthesis and Electroanalysis
Advances in Organic Synthesis
Advances in Organic Synthesis
14