Development of response surface methodology for optimization of congo red adsorption utilizing exfoliated graphite as an efficient adsorbent
In the present study, we developed an optimization model of CR adsorption onto EG using response surface methodology (RSM) as a statistical tool. The EG was structurally characterized using several techniques such as scanning electron microscope (SEM), estimation of N2 adsorption/desorption isotherm...
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| Main Authors: | , , , , , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | en |
| Published: |
Elsevier Ltd
2019
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| Subjects: | |
| Online Access: | https://umpir.ump.edu.my/id/eprint/46856/1/Development%20of%20response%20surface%20methodology%20for%20optimization%20of%20congo%20red.pdf https://umpir.ump.edu.my/id/eprint/46856/ https://doi.org/10.1016/j.matpr.2020.03.356 |
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| Summary: | In the present study, we developed an optimization model of CR adsorption onto EG using response surface methodology (RSM) as a statistical tool. The EG was structurally characterized using several techniques such as scanning electron microscope (SEM), estimation of N2 adsorption/desorption isotherm and plotting of pore size. The EG was used as adsorbent to remove the CR from water. Three variables involving concentration (20-50 mg/L), pH (4-10), adsorption time (0-210 min) were investigated. To find out the optimal condition, we adopted Design Expert software-based RSM for the experimental design, 3D surface plotting, and optimization. The optimal results were found at concentration of 48.3 mg/L, and contact time of 188 min for the highest CR adsorption capacity at 53.423 mg/g. With high compatibility via confirmation test, it is suggested that the RSM can be the suitable method to optimize the adsorption of CR onto EG. |
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