SYNTHESIS OF Fe-MCM-41 WITH HIGHLY ORDERED MESOPOROUS STRUCTURE AND HIGH IRON CONTENT AND ITS ADSORPTION ISOTHERMS OF ARSENATE AND ARSENITE
Abstract
In this paper, the synthesis of iron containing MCM-41 material (Fe-MCM-41)and its adsorption isotherms were investigated. Fe-MCM-41 materials were synthesized bydirect process using K2[Fe(CN)6] or iron oxalate as iron source. The materials obtainedwere characterized by XRD, adsorption/desorption isotherms of nitrogen. The resultsshowed that using K2[Fe(CN)6] as an iron source can provide Fe-MCM-41 with highlyordered mesoporous structure and high iron content with molar ratio of Si/Fe around 10.The isotherm study showed that the prepared Fe-MCM-41 sample exhibited highadsorption activity towards As(III) as well as As(V). The experimental data of adsorption ofAs(III) and As(V) onto Fe-MCM-41 followed the Langmuir models. The maximummonolayer adsorption capacities based on this model were 25.4 and 37.2 mg/g for As(III)and As(V), respectively.References
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