Removal of citric acid from aqueous solution by catalytic wet peroxidation using effective mesoporous Fe‐MCM‐41 molecular sieves

Adsorption and heterogeneous advanced oxidation of phenolic contaminants using Fe loaded mesoporous SBA-15 and H2O2

“…However, few investigations have been reported in using mesoporous materials for heterogeneous Fenton oxidation. Gokulakrishnan et al [11] synthesised mesoporous Fe-MCM-41 molecular sieves (Si/Fe = 25, 50, 75 and 100) by a hydrothermal co-condensation method and evaluated the behaviour in removal of citric acid from aqueous solution by the wet peroxidation. They found that more mineralisation of citric acid was achieved by heterogeneous catalysis with Fe-MCM-41 with the percentage removal of total organic carbon (TOC) of citric acid following the order Fe-MCM-41 (Si/Fe = 25) > Fe-MCM-41 (Si/Fe = 50) > Fe-MCM-41 (Si/Fe = 75) > Fe-MCM-41 (Si/Al = 100).…”

Preparation and characterization of raw and carbon from banana peel by microwave activation: Application in citric acid adsorption

“…Removal of CA is accomplished using different methods such as membrane filtration [8], anaerobic treatment [9], electrochemical oxidation [10], biohydrogen production [11], microbial treatment [12], catalytic wet peroxidation [13], and anaerobic and multilevel aerobic digestion [14][15][16]. However, these processes are associated with very high operational costs [7].…”

“…CA is mildly toxic by ingestion, moderately toxic by subcutaneous and intraperitoneal route, and poisonous by intravenous route. Furthermore, in excess amounts, CA causes problems to flora and fauna and disturbs the esthetic value of drinking water [4][5][6][7].Removal of CA is accomplished using different methods such as membrane filtration [8], anaerobic treatment [9], electrochemical oxidation [10], biohydrogen production [11], microbial treatment [12], catalytic wet peroxidation [13], and anaerobic and multilevel aerobic digestion [14][15][16]. However, these processes are associated with very high operational costs [7].…”

Heterogeneous Fenton Oxidation of Refractory Dye Rhodamine B in Aqueous Solution with Mesoporous Fe/SBA-15

“…To date, iron-based solid catalysts as promising heterogeneous Fenton catalysts for degradation of organic pollutants have been reported, and can be classified as unsupported iron oxides including Fe2O3, Fe3O4, and zero-valence iron, [14][15][16] unsupported iron composites including some non-ferrous metals with variable valence, [17][18][19] and supported iron catalysts including iron-immobilized resin, 20 membrane, 21 clay, 22,23 carbon, [24][25][26] zeolite, [27][28][29] mesostructured silica materials, 13,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] and alumina. 46,47 Mesoporous silica SBA-15, one of the mesoporous molecular sieves, has highly ordered structure, large pore size, and high surface area, 48,49 which favors the loading and dispersion of the catalytic active components which possess the nano effect due to the nano-size domain.…”