|
Optimization Conditions for Increasing Cation Exchange Capacity of Coal Fly Ash Zeolite Modified with Chitosan Using Box-Behnken Design |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Pathanin Sangaroon 2. Thares Srisatit 3. Pongsert Sriprom |
| Title | Optimization Conditions for Increasing Cation Exchange Capacity of Coal Fly Ash Zeolite Modified with Chitosan Using Box-Behnken Design |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2562 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 12 |
| Journal No. | 2 |
| Page no. | 58-68 |
| Keyword | Coal fly ash, Cation exchange capacity, Response surface methodology, Box- Behnken Design, Zeolite |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | The optimization conditions of high Cation Exchange Capacity (CEC) of coal fly ash (CFA) zeolite modified with chitosan were studied. The experimental design had employed Box-Behnken design with 3 factors at 3 levels. The independent variables were chitosan concentration (5-15 g/L), retention time (12-36 hours), and temperature (40-60oC). It is resulted that the independent variables of chitosan concentration had significant effect to CEC at 95% confidence (P<0.05). In vice versa, retention time and temperature had no significant effect to CEC at 95% confidence (P>0.05). However, the interaction effect between chitosan concentration with retention time and retention time with temperature had significant effect to CEC at 95% confidence (P<0.05) Thus, the optimum conditions of high CEC (474.21 meq/100g) were 15 g/L of chitosan concentration, 36 hours of retention time, and 40oC of temperature. Regarding with 3 times of validation for such optimum conditions, CEC was 474.21ฑ 5 meq/100g which was closely the predicted value. CEC of chitosan modified with CFA-zeolite had CEC more than CFA-zeolite (272.12 meq/100g) about 2 times, indicating chitosan was the appropriate material for increasing CEC on CFA-zeolite. |
