Abstract
The Fenton process coupled to photosonolysis (UV light and Us), using Fe2O3catalyst supported on Al2O3, was used to oxidize a model pollutant like acid green 50 textile dye (AG50). Dye degradation was followed by AG50 concentration decay analyses. It was observed that parameters like iron content on a fixed amount of catalyst supporting material, catalyst annealing temperature, initial dye concentration, and the solution pH influence the overall treatment efficiency. High removal efficiencies of the model pollutant are achieved. The stability and reusability tests of the Fe2O3catalyst show that the catalyst can be used up to three cycles achieving high discoloration. Thus, this catalyst is highly efficient for the degradation of AG50 in the Fenton process.
Highlights
There is an increasing concern regarding the detrimental effects of textile dyes on the environment because they can be potentially toxic, carcinogenic, and mutagenic [1]
The heterogeneous Fenton process involves the use of solid Fenton catalyst that would minimize such problems
Several catalyst supporting materials have been synthetized like pillared clay-based catalysts [7], iron-oxide mineral catalysts [8, 9], Fe(II)Fe(III)-layered double hydroxides [10], iron-activated carbon catalyst [11, 12], and Fe(II)/(III)-Al2O3 [13,14,15], among others. Organic pollutants such as textile dyes [7, 9, 10, 13, 16,17,18], phenol and related compounds [11, 12, 19, 20], and lignin [21] have been oxidized by the heterogeneous Fenton process
Summary
There is an increasing concern regarding the detrimental effects of textile dyes on the environment because they can be potentially toxic, carcinogenic, and mutagenic [1]. Several catalyst supporting materials have been synthetized like pillared clay-based catalysts [7], iron-oxide mineral catalysts [8, 9], Fe(II)Fe(III)-layered double hydroxides [10], iron-activated carbon catalyst [11, 12], and Fe(II)/(III)-Al2O3 [13,14,15], among others Organic pollutants such as textile dyes [7, 9, 10, 13, 16,17,18], phenol and related compounds [11, 12, 19, 20], and lignin [21] have been oxidized by the heterogeneous Fenton process
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