Journal
DESALINATION AND WATER TREATMENT
Volume 53, Issue 8, Pages 2266-2277Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2013.865568
Keywords
Reactive Brilliant Blue KN-R; Okara; Kinetic; Isotherm; Adsorption
Categories
Funding
- NSFC [51078007, 51378027]
- BJ-NSF [8112007]
- PHR-IHLB [PHR201-10819]
- Beijing Talent Foundation of BJUT [2013-JH-L06]
Ask authors/readers for more resources
This study investigated the feasibility of using okara as a low-cost adsorbent for the removal of Reactive Brilliant Blue KN-R (RBB), a typical reactive dye, from aqueous solution. Batch adsorption experiments were conducted to evaluate the effects of pH, adsorbent dosage, initial dye concentration, and temperature. It was proved that strong acidic condition was favorable for the adsorption process and the optimal pH was 2.0. Langmuir-Freundlich (L-F) isotherm fitted well with the equilibrium data. The maximum adsorption capacity determined from the L-F isotherm was 68.67, 159.60, and 402.58 mg/g at 20, 35, and 50 degrees C, respectively. Kinetic studies showed that adsorption of RBB followed the pseudo-second-order kinetic model, both boundary layer diffusion and intra-particle diffusion might affect the adsorption rate. Thermodynamic study demonstrated the spontaneous and endothermic natures of the adsorption process. Fourier transform infrared analysis revealed that chemical functional groups (e.g. amine, hydroxyl, carboxyl, phosphate, and ether) on okara would be the active binding sites for adsorption of RBB. The results showed that okara could be effectively used as a low-cost and alternative adsorbent for the removal of RBB from wastewater.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available