Modified SBA-15 synthesized using sugarcane leaf ash for nickel adsorption

Abstract

<span style="mso-ansi-language:EN" lang="EN">Highly<span style="mso-ansi-language:EN" lang="EN"> ordered mesoporous variety of silica SBA–15 (Santa Barbara Acid – 15) has been prepared from sugarcane leaf ash by template assisted method and it has been successfully used as an adsorbent for nickel. Post-synthesis modification of the particle is done by grafting of carboxyl, amino, thiol and phenyl groups through siloxypropane tethers to the siliceous surface of SBA-15. Adsorption efficiency of products is estimated in batch mode and compared. Maximum percentage removal (92.5%) is obtained with a<span style="mso-ansi-language: EN-IN;mso-fareast-language:EN-IN">mine functionalised SBA-15 with an initial Ni (II) concentration of 80 mg/L at a <i style="mso-bidi-font-style:normal">p</i>H value of 5. The Freundlich isotherm model describes the equilibrium well.<span style="mso-ansi-language:EN" lang="EN">

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