Adsorption of Rhodamine B Dye on Elaeis guineensis Frond Fiber

作者：Low Ling Wei; Teng Tjoon Tow^*; Alkarkhi Abbas F M; Morad Norhashimah; Azahari Baharin

来源：Separation Science and Technology (Philadelphia), 2014, 49(7): 1104-1118.

DOI：10.1080/01496395.2013.872148

• adsorption
• Elaeis guineensis frond fiber
• response surface methodology (RSM)
• Rhodamine B

Adsorption of Rhodamine B (RB) dye was investigated using raw Elaeis guineensis frond fiber (EGFF). Experiments were performed using face centered composite statistical design with six input parameters namely pH (2-10), agitation speed (150-300 rpm), initial dye concentration (100-500 mg/L), temperature (27-80 degrees C), contact time (10-40 min), and adsorbent dosage (0.5-1.5 g). Particle size of %26lt; 45 m was taken as a fixed input parameter. Regression analysis showed good fit of the experimental data to the second-order polynomial model with coefficient of determination (R-2) value of 0.99 and 0.98 for color removal and chemical oxygen demand (COD) reduction, respectively. Two optimum operating conditions for the adsorption of RB were found using RSM, resulted in %26gt; 99% of color removal and %26gt; 97% of COD reduction. The adsorption process was rapid and fitted to the pseudo-second-order kinetic model, while equilibrium data were favorably described by the Langmuir isotherm. The adsorbent showed excellent reusability with 0.1 M NaOH solution as desorbing agent. The findings make EGFF a promising and low-cost adsorbent for the removal of RB from aqueous solutions.

• 出版日期2014-5-3