Preparation and characterization of modified mesoporous MCM-41for removal of organic and inorganic pollutants.

Document Type : Original Article

Authors

1 Chemistry Department, Faculty of science, Mansoura university

2 chemistry department,faculty of science, mansoura univesity, egypy

3 Central Lab.of drinking water, Dakahliya water company

Abstract

Here, sulfamic acid (SA) was added to mesoporous silica (MCM-41) to successfully remove the metal ions (Cu and Mn) and methylene blue (MB) dye. SA/MCM-41 composites with different weight compositions of SA were successfully made using the straightforward impregnation method. Several techniques, including SEM, EDX, XRD, BET, and FT-IR spectroscopy, were used to characterize the as-synthesized composites. Non-aqueous potentiometric titration has been used to investigate the acidic characteristics of the composites. MCM-41's ordered mesoporous structure with amorphous lattice is confirmed by XRD studies, and even after treatment with SA, its mesoporous structure remained unchanged. The high surface area of 10SA-MCM-41 (211.7 m2/g) decreased when sulfamic acid was added, reaching 5.38 m2/g at 50%. SA-MCM-41. The prepared composites’ acidic strength was gradually enhanced by increasing the SA content to 35 weight percent SA/MCM-41. According to the tests, the as-synthesized composites could remove 50–55% of the MB dye, 70–75% of the Cu ions, and 60–65% of the Mn ions.

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