Reactive Blue 19 dye adsorption on coconut shell based activated carbon
|
|
Reactive Blue 19 dye adsorption on coconut shell based activated carbon
Kinetics, equilibrium and thermodynamics studies of C.I. Reactive Blue 19 dye adsorption on coconut shell based activated carboncoconutactivatedcarbon.com
In this work, low cost coconut shell based activated carbon (CSAC) was produced from agricultural wastes for the kinetics, equilibrium and thermodynamics studies of Reactive Blue 19 (RB19) dye adsorption from aqueous solution. CSAC was characterized using the UV/visible spectrophotometer, Fourier transforms infrared spectroscopy (FT-IR), field emission dual beam-scanning electron microscopy/focused ion beam (FES-SEM/FIB). Batch adsorption experiments were conducted to examine the effects of contact time (10–50 min), initial dye concentration (10–50 mg/L), pH (3–12), and solution temperatures (28°C–80 °C) on the dye removal. Thermodynamic analysis shows the standard Gibb's free energy change (ΔG°) to have negative values, confirming the feasibility and spontaneity of the process. The changes in enthalpy (ΔH°) and entropy (ΔS°) were found to be 7.771 kJ/mol and 0.035 kJ/mol K, respectively. Equilibrium data were fitted to Langmuir and Freundlich isotherm models with good correlation coefficients and coefficient of determination. The kinetic data were fitted to pseudo-first-order rate law, pseudo-second-order kinetics, and intra-particle diffusion model. granular activated carbon coconut shellThe experimental data were found to have the best agreement with the pseudo-second-order kinetic model. Activation energy, (Ea) was evaluated as 57.84 kJ/mol. The specific adsorption rate constant, k2 increased virtually 39-fold when temperature was raised to 80 °C. |
|
|
|
|
|
|
|
超激情辣妹免费视讯视频聊天室 , 视频聊天室 , 聊天室 , 视讯 , 视讯聊天 , 视讯聊天室 , 聊天室 , 免费视讯 , 视讯美女聊天室 , 视讯辣妹
交友聊天室 , 美女秀场 , 美女直播 , 美女视频 , 美女主播 , LIVE173影音视讯聊天室 , momo520 , 金瓶梅视讯聊天室 , MeMe104 , UThome聊天室
UT视讯聊天 , 真人裸聊 , 色情表演 , 夜色直播APP , 超激情辣妹免费视讯视频聊天室 , 视频聊天室 , 聊天室 , 视讯 , 视讯聊天 , 视讯聊天室
聊天室 , 免费视讯 , 视讯美女聊天室 , 视讯辣妹 , 交友聊天室 , 美女秀场 , 美女直播 , 美女视频 , 美女主播 , LIVE173影音视讯聊天室
momo520 , 金瓶梅视讯聊天室 , MeMe104 , UThome聊天室 , UT视讯聊天 , 真人裸聊 , 色情表演 , 夜色直播APP , 超激情辣妹免费视讯视频聊天室 , 视频聊天室 |
|
|
|
|
|
