Montmorillonite KSF as catalyst for degradation of acetaminophen with heterogeneous Fenton reactions

Abstract

The degradation of acetaminophen (APAP) in aqueous solutions with heterogeneous Fenton reactions was investigated with montmorillonite KSF as catalyst. The influencing factors of the initial APAP concentration, initial pH value, initial KSF dosage and H 2 O 2 dosage were studied. The results showed that APAP could be effectively degraded under the conditions of pH 4.0, KSF 0.2 g/L and H 2 O 2 0.5 mM, and the degradation efficiency of 0.5 mg/L APAP reached 93.5% after reaction for 30 min. The degradation kinetics of APAP followed the pseudo first-order rate law.

Optical Properties of Iron Pillared Clays as Catalysts for Heterogeneous Photo-Fenton Process

“…In the past decade efforts have been made to develop solids displaying catalytic activity in photo-Fenton processes, thus allowing the simple recovery of the catalyst. Iron minerals or iron species supported on different solid materials (silica, alumina, zeolites, clays, activated carbon) have been tested as catalysts in photo-Fenton processes. − They have been tested with a wide variety of contaminants including dyes, phenolic compounds, pharmaceutical drugs, agrochemicals, and representatives of diverse industrial and municipal effluents . Other materials based on manganese oxides , have been reported as effective heterogeneous catalysts in wet peroxide oxidation processes for contaminant degradation in aqueous solution.…”

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

“…Valued features for solid catalysts are a high specific surface area, insuring the exposure of the catalytic species, and low leaching values of it in order to avoid not only contamination but also and especially catalyst degradation. In this direction, iron species have been supported on different solids (Rodríguez et al 2010) as silica, alumina, zeolites (Zhang et al 2011, Gonzalez-Olmos et al 2012, mesoporous materials such as SBA-15 (Martínez et al 2005) and clays, either synthetic, natural, or by different methods (Timofeeva et al 2005, Cheng et al 2008, De León et al 2008, Feng et al 2009, Deng et al 2010, Ayodele et al 2012, Catrinescu et al 2012).…”