“…This feature enhances the stability of the catalyst towards the splitting of H 2 O 2, and thus the leaching of ferrous ions from the catalyst is reduced. Magnetite ( Munoz et al, 2015 , Zubir et al, 2015 , Du et al, 2017 , Nguyen et al, 2017 , Nidheesh et al, 2014 , Costa et al, 2006 ), ferrihydrite ( Zhu et al, 2018 , Xu et al, 2017 , Xu et al, 2016 , Zhang et al, 2014 , Zhu et al, 2018 ), hematite ( Pradhan et al, 2013 , Patra et al, 2016 , Jaramillo-Paez et al, 2017 , Chen et al, 2016 , Huang et al, 2016 ), goethite ( Xu et al, 2016 , Wang et al, 2017 , Hou et al, 2017 , Krumina et al, 2017 , Jin et al, 2017 , Qian et al, 2018 ), schwertmannite ( Duan et al, 2016 , Yang et al, 2016 , Wang et al, 2013 ), lepidocrocite ( He et al, 2017 , Sheydaei et al, 2014 ), and maghemite ( Wang et al, 2008 , Ma et al, 2018 ) are some of the classes of iron minerals utilised as Fenton-catalysts. The recent developments regarding these heterogeneous Fenton catalysts are discussed in the upcoming sections.…”