Adsorption of Direct Blend Yellow D-3RNL onto bamboo-base activated carbon: optimization, kinetics, and isotherm

作者：Wang Lianggui^*

来源：Desalination and Water Treatment, 2013, 51(28-30): 5792-5804.

DOI：10.1080/19443994.2012.760112

• Response surface methodology
• Adsorption
• Direct Blend Yellow D-3RNL
• Bamboo-base activated carbon
• Akaike Information Criterion
• Kinetics
• Isotherm

Adsorption of Direct Blend Yellow D-3RNL in aqueous solution by activated carbons prepared from Moso timber bamboo stem residues was optimized by using central composite design matrix and response surface methodology. A maximum dye removal from the experimental validation reached 92.1% under the optimum conditions (initial dye concentration 20mgL(-1), pH 2, bamboo-based activated carbon dosage 20gL(-1), temperature 50 degrees C, and time of adsorption 20h) with the relative standard deviation 5.37%. The high R-2 value (0.9487) for the second-order model obtained from the analysis of variance (ANOVA) indicated that the experimental data fitted well with the predicted data. The adsorption followed the nonlinear model of pseudo-second-order reaction and agreed well with Freundlich judged by the levels of Akaike Information Criterion and Akaike weight. Furthermore, the thermodynamics analysis indicated that the adsorption was a spontaneous, endothermic, entropy-increasing, and chemisorption process.

• 出版日期2013-8-1
• 单位丽水学院