Application of response surface methodology for optimization of azocarmine B removal by heterogeneous photo-Fenton process using hydroxy-iron–aluminum pillared bentonite

•The photo-Fenton catalytic activity of hydroxy-iron–aluminum pillared bentonite was tested under different reaction conditions.•Hydroxy-iron–aluminum pillared bentonite shows high photocatalytic activity.•Response surface methodology was used to optimize operating variables.•The optimum operating c...

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