AN INVESTIGATION ON WINDMILL PALM LEAF SHEATH FIBER POWDER-BASED ACTIVATED CARBON FOR DYE ADSORPTION

作者：Li, Jiali; Zhang, Tonghua^*; Cheng, Lan; Guo, Min; Wang, Shu; Ran, Ruilong; Ma, Yifa

来源：Wood and Fiber Science, 2016, 48(3): 143-155.

• Windmill palm leaf sheath fiber
• activated carbon
• methylene blue
• adsorption isotherm
• kinetics
• thermodynamics

Windmill palm leaf sheath fiber (WPF) is an abundant agricultural byproduct and useful resource. To increase its valuable qualities and usefulness, we proposed to prepare WPF powder-based activated carbon (WPFAC) as a novel adsorbent for adsorbing methylene blue, with the specific aims for pollution treatment. The porous features of WPFAC were assessed based on nitrogen adsorption, and the adsorption capacity was studied by investigating the effect parameters of contact time, initial concentration, pH, and temperature. Research results showed a combination microporous and mesoporous 'structure of WPFAC with Brunauer Emmett Teller surface of 1049.26 m(2)/g. WPFAC exhibited excellent adsorbing performance, and the maximum monolayer adsorption capacity was up to 51.78 times higher than other absorbents. Meanwhile, the adsorption capacity increased accordingly as the parameters increased. For better understanding, the adsorption behavior, isotherms, kinetics, and thermodynamics were studied using the equilibrium data. Investigation results illustrated that the equilibrium data were well consistent with the Langmuir isotherm, with a maximum monolayer adsorption capacity of 253.16, 289.85, and 303.95 mg/g at 30 degrees C, 40 degrees C, and 50 degrees C, respectively. The adsorption kinetics followed the pseudo-second-order kinetic model. Thermodynamic parameters: standard enthalpy (Delta H degrees), standard entropy (Delta S degrees), and standard free energy (Delta G degrees) indicated an endothermic and spontaneous absorbing process. WPFAC is a promising material that has high utility values for its amazing adsorption capacity.

• 出版日期2016-7
• 单位西南大学