Abstract
Mesoporous silica SBA-15 has been successfully synthesized and its surface has been modified/functionalized with CPTMS. The making of pure SBA-15 was operated at an optimized concentration of Pluronic 123 surfactant at 60 mM which yields surface area of 831.996 m2/g determined by BET. The modified SBA-15, SBA-15+CPTMS have a lower surface area in comparison with neat SBA-15. In this study, SBA-15+CPTMS have a surface area of about 711.061 m2/g. This very high surface area was utilized to remove the Pb in industrial wastewater using laboratory made water samples. Despite lower surface area and pore diameter of SBA-15+CPTMS in comparison with pure SBA-15, the effectivity of SBA-15+CPTMS in lead adsorption much higher than mesoporous silica SBA-15 especially at a lower concentration of adsorbents. In this paper, we compared the percentage of Pb removal using mesoporous silica SBA-15 and CPTMS-SBA-15 systems. It was found at a low concentration of adsorbent, CPTMS-SBA-15 yields three times percentage of Pb removal than pure SBA-15. However, at high concentration of adsorbent, CPTMS-SBA-15 percentage of Pb removal is just slightly higher than the pure SBA-15 percentage of Pb removal.
Highlights
The rapid economic development at the end of the 20th century brings prosperity and wealth for many countries, especially in G-20 countries
We focus on SBA-15, which is a mesoporous silica with a fine pore diameter arrangement and controllable pore diameter between 5 to 15 nm, other mesoporous silica widely used such as MCM-41 or other MCM family and other SBA
We investigated the effect of CPTMS as functionalization/silanized agent of mesoporous silica SBA-15 on the Pb adsorption effectivity through Adsorption Atomic spectroscopy (AAS) and BET results comparison
Summary
The rapid economic development at the end of the 20th century brings prosperity and wealth for many countries, especially in G-20 countries. SBA-15 compared with older mesoporous silica has larger pores and thicker walls (3.1 to 6.4 nm), these make SBA-15 yields has good thermal, mechanical stability and chemical resistance properties All of these advantages make SBA-15 become a material which can be used for wide applications. In order to increase the effectivity of mesoporous silica SBA-15 in sorption application, modification of surface should be made. The common silane surface modification n was operated using APTES (C9H23NO3Si, 3-aminopropyltriethoxysilane) [Li, 2011] and APTMS (3-aminopropyltrimethoxysilane) [Molina de la Torre, 2017] In this manner, silanization process produces a terminal amine group (–NH2) and the connection of –NH2 group is created providing single electron pair that makes possible to form complexes with heavy metal ions [Chong, 2003; Zhao, 2011]. We investigated the effect of CPTMS as functionalization/silanized agent of mesoporous silica SBA-15 on the Pb adsorption effectivity through Adsorption Atomic spectroscopy (AAS) and BET results comparison
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