Adsorption and Application of Tannic Acid and Acid Dyes on Amino-functionalized SBA-15

• Main Authors: Li, Jhengjhe, 李政哲
• Other Authors: Liou, Tzonghorng
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/96696717229866387342

碩士 === 明志科技大學 === 化學工程研究所 === 101 === This study reported synthesis of amino-functionalized mesoporous silica materials by post-synthesis with Pentaethylenehexamine (PEHA), using P123 as template and sodium silicate as silica source. Batch sorption experiments were carried out to remove tannic acid (TA), acid blue 40 (AB-40), acid red 1 (AR-1) from their aqueous solutions. The structural order and textural properties of the synthesized materials have been studied by XRD‚ FE-SEM‚ TEM‚ FTIR‚ TGA and BET. The adsorption capacity of the adsorbents varies in the following order : N-SBA-15 > SBA-15. The adsorption isotherms showed that AB-40 was better fitted by the Langmuir isotherm. The adsorption kinetics showed that the equilibrium adsorption amount of TA, AB-40 and AR-1 were 426.25, 427.97 and 329.41 mg/g, respectively. The adsorption kinetics were well described by the pseudo-second order equation, indicating that chemical adsorption is the rate-limiting step.