Enhancing acid orange II degradation in ozonation processes with CaFe₂O₄ nanoparticles as a heterogeneous catalyst.

7b and d illustrate a decreasing trend in the reaction rate constant ( k ) from 0.0643 min −1 to 0.0294 min −1 as the AOII concentration increased from 100 mg L −1 to 500 mg L −1 , which corresponds to TOC concentrations from 16.89 mg L −1 to 82.94 mg L −1 .

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