Journal
WATER
Volume 11, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/w11061304
Keywords
clay; desorption; methylene blue; optimization; response surface methodology
Categories
Funding
- Fundamental Research Grant Scheme, FRGS [203/PJKIMIA/6071413]
- Research University Grant, RUI [1001/PJKIMIA/814269]
- USM fellowship
- Kementerian Pengajian Tinggi Malaysia
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Batch desorption experiments of methylene blue (MB) dye from a clay adsorbent coating were carried out to evaluate the maximum desorption conditions. Combination of thermal and chemical regeneration techniques were used for the desorption process. The desorption of MB was found to be 70% using an HCl solvent after heating adsorbent coating at 160 degrees C. The optimization study was carried out to identity the optimum desorption conditions using MINITAB 14 software. The individual and interaction effects of three factors, temperature, dye concentration and contact time for desorption of dye were determine by applying response surface methodology (RSM). The optimization results showed that all three factors have main effects whereas the interaction of concentration-time is significant as compared to other interactions. The findings exhibit a maximum desorption efficiency 23 mg/g at 60 degrees C for 100 mg/L of dye and 150 min of contact time.
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