Modified Dolomite as an Efficient Catalyst in the Fenton Process: Kinetics, Thermodynamics and Modelling Using Central Composite Design

In this work, methyl orange degradation was investigated using iron-modified dolomite prepared by simple impregnation of iron followed by calcination at 500 °C for 4 h. The natural dolomite before and after modification was subjected to comprehensive characterization utilizing various techniques. XRD and FTIR analysis confirmed the preservation of the dolomite structure and functional groups. The chemical composition obtained by XRF and EDX showed a successful insertion of iron into the dolomite structure with an increase from 1.3 to 5.3 wt