Abstract
Chromium ion accumulation in environment is a health hazard to human being. A thiohydroxy-functionalized mesoporous material SBA-15-SH as adsorbent was prepared by the hydrothermal polycondensation method in this study. When 3-mercaptopropyltrimethoxysilane was used as the silicon source, SBA-15 was successfully modified with the thiohydroxy group confirmed by FTIR. This designed mesoporous material was rod-like with regular and well-defined channel systems of 7 nm. The adsorption capacity of SBA-15-SH to Cr6+ was affected by the adsorption temperature, Cr6+ solution pH and its initial concentration together with the adsorbent dosage. The adsorption equilibrium was reached in 10 min which obeyed the Langmuir adsorption equation and the pseudo second-order kinetic mode. The maximum adsorption capacity of SBA-15-SH to Cr6+ was 6.85 mg/g when the Cr6+ solution pH and adsorption temperature was controlled at 4.0 and 25-45 ℃, respectively. This functionalized mesoporous material was successfully applied in spiked tap-water and industrial waste water, and the recovery rate can reach 95%-105%.
Translated title of the contribution | Thiohydroxy-functionalized Mesoporous Materials: Preparation and its Adsorption to Cr6+ |
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Original language | Chinese (Traditional) |
Pages (from-to) | 193-198 |
Number of pages | 6 |
Journal | Wuji Cailiao Xuebao/Journal of Inorganic Materials |
Volume | 35 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2020 |