Application of a montmorillonite clay modified with iron in photo-Fenton process. Comparison with goethite and nZVI

Abstract

Iron pillared clay (Fe-PILC) was prepared from a montmorillonite and was characterized by scanning electron microscopy and X-ray fluorescence. Fe-PILC catalytic activity was evaluated in photo-Fenton processes applied to the degradation of 2-clorophenol. Different catalyst loads were assayed. The Fe-PILC allowed almost complete degradation of the contaminant. An increase in the contaminant degradation rate was observed, following leaching of iron during catalytic assays, which suggest the existence of a homogeneous photo-Fenton mechanism. The catalytic performance of the Fe-PILC was compared with that for goethite and zero valent iron nanoparticles. Differences were found regarding the achieved degradation levels, the efficiency in oxidant consumption, and the extension of iron leaching.

Al13-pillared montmorillonite modified by cationic and zwitterionic surfactants: A comparative study

“…The physical and chemical properties of natural montmorillonites can be modified by cation exchange reactions with metal complex cations and organic cations, e.g., pillared interlayered clays (PILCs) (Pinnavaia, 1983) and organo-montmorillonites (OMts) . Because of the large specific surface area, high pore volume, and strong surface acidity, PILCs have significant applications in environmental remediation (Li et al, 2013;De León et al, 2014), such as being used as efficient adsorbents for oxyanionic contaminants and heavy metals (Zhou et al, 2010;Zhu et al, 2014). PILCs, however, do not efficiently remove the hydrophobic organic compounds from water because of its hydrophilic surface (Zhu et al, 2009b).…”

Catalytic assessment of solid materials for the pyrolytic conversion of low-density polyethylene into fuels

“…An aluminum oxide-pillared clay (Al-PILC) was prepared from a calcium-rich montmorillonite from Bañado de Medina, Uruguay, as reported elsewhere [ 33 ]. An iron oxide-pillared clay (Fe-PILC) was also prepared with the same clay as reported elsewhere [ 34 , 35 ]. Other materials that were also tested are an activated carbon DARCO, the calcium-rich montmorillonite previously referred (Mont) and a commercial Fluid cracking catalyst (FCC) from Fábrica Carioca de Catalizadores, Brazil, all of them without any previous treatment.…”

Fenton Reagent for Organic Compound Removal in Wastewater

“…A possible modification of the PF process was done by adding an iron-modified montmorillonite clay catalyst in the process. This idea was the core of Leon et al's study [73]. In this study, raw montmorillonite clay was dried and sifted through a filter that has a pore size of 250 µm.…”