Synthesis, Characterization, and application of Ag-Doped Mercapto-Functionalized clay for decolorization of Coomassie brilliant Blue: Optimization using RSM

Herein, we report the use of silver nanoparticles (AgNPs) supported on mercapto-functionalized clay for the decolorization of Coomassie brilliant blue (CBB). The effect of four parameters (NaBH4 amount, CBB concen-tration, time, and catalyst amount) on the decolorization efficiency and the optimization of the process was investigated. Under optimum conditions (8.76 mM, 20.86 mg/L, 115.82 s and 0.23 mg/mL for NaBH4 amount, CBB concentration, time, and catalyst amount, respectively), the decolorization efficiency for CBB was 97.73%. The kinetic results indicated decolorization rate was increased toward the temperature (293 to 323 K). The thermodynamic parameters show that the process is endothermic and favorable.

Automated summary

In this study, silver nanoparticles (AgNPs) supported on mercapto-functionalized clay were used for the decolorization of Coomassie brilliant blue (CBB). The effects of four parameters (NaBH4 amount, CBB concentration, time, and catalyst amount) on the decolorization efficiency and the optimization of the process were investigated. Under the optimum conditions, a decolorization efficiency of 97.73% for CBB was achieved. The kinetic and thermodynamic results indicated that the decolorization rate increased with temperature and the process was endothermic and favorable.