|
Adsorption of Congo red from aqueous solution by surfactant-modifiedrice husk: Kinetic, isotherm and thermodynamic analysis |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Chanut Bamroongwongdee 2. Songsiri Suwannee 3. Manit Kongsomsaksiri |
| Title | Adsorption of Congo red from aqueous solution by surfactant-modifiedrice husk: Kinetic, isotherm and thermodynamic analysis |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2562 |
| Journal Title | Songklanakarin Journal of Science and Technology |
| Journal Vol. | 41 |
| Journal No. | 5 |
| Page no. | 1076-1083 |
| Keyword | adsorption, Congo red, modified rice husk, kinetics, thermodynamics |
| URL Website | http://rdo.psu.ac.th/sjstweb/index.php |
| ISSN | 0125-3395 |
| Abstract | In this present work, organo-modified rice husk (SMRH) adsorbent was prepared by using cetyltrimethyl ammoniumbromide (CTAB) for removing Congo red (CR), a model anionic dye, from aqueous solution. The FTIR analysis indicated thatCTAB was adsorbed onto the surface of rice husk. The adsorption was found to be favored at a lower pH. The amount of CRuptake was found to increase with increasing the initial CR concentration and contact time but decrease with increasing theamount of adsorbent. The equilibrium adsorption data were fitted well with the Langmuir model. The adsorption kinetics showedthat CR adsorption onto SMRH followed the pseudo-second-order model. It was found that intra-particle diffusion was not theonly rate-determining step. Thermodynamic studies revealed that CR adsorption onto SMRH was spontaneous and endothermicin nature. |
