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R&D

Development of materials and processes derived from recycled waste

Development of a process to build a resource circulation society by recycling waste desulfurization agent discharged from desulfurization facilities and using it as a Fenton oxidation catalyst for the treatment of hard-to-decompose wastewater.

Introduce

Development of materials and processes derived from recycled waste

Fenton oxidation catalyst overview
oxidation intro image
Characteristics of Fenton Oxidation Catalyst

Catalyst production through post-treatment and molding of spent desulfurization agent

Characteristics of catalyst table image Characteristics of catalyst table image

Catalyst Manufacturing method

Iron sulfide generation reaction equation

2Fe(OH)3(s) + 3H2S(g) → Fe2S3(s) + 6H2O(g)

2FeOOH(s) + 3H2S(g) → Fe2S3(s) + 4H2O(g)

amorphous iron hydroxide

Amorphous iron hydroxide

amorphous iron table
Sample Fe2O3
Iron hydroxide desulfurization agent (XRF analysis, wt%) 73.62
iron sulfide breaking hydrogen sulfide

Iron sulfide breaking hydrogen sulfide

iron sulfide table
Sample Fe S
Iron sulfide (EDS analysis, wt%) 11.27 66.75
catalyst sulfide

Catalyst for heat-treated iron sulfide Fenton oxidation reaction

Fenton Oxidation Catalyst Experiment Results
test graph

Tetracycline removal test using FeS/PS system (pH 6.5)

mechanism bar-graph mechanism bar-graph

Tetracycline oxidation mechanism using sulfate radicals

Obtain a tetracycline removal rate of 95% or more using FeS/PS

It can be confirmed that it played an important role in confirming the generation of sulfate radical and OH radical and removing target contaminants using the Radical scabengers and electron paramagnetic resonance (EPR)