Process variables optimization for preparation and characterization of novel adsorbent from lignocellulosic waste

Chowdhury, Z.Z. and Khalid, K. and Arami-Niya, A. and Khan, R.A. and Zain, S.M. (2012) Process variables optimization for preparation and characterization of novel adsorbent from lignocellulosic waste. BioResources, 7 (3). pp. 3732-3754. ISSN 19302126

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Abstract

In this study, powdered activated carbon (PAC) was produced from agricultural waste biomass of kenaf (Hibiscus cannabinus L.) core or stalk, and the process variables were optimized by applying central composite design (CCD). The influences of carbonization temperature, duration of activation, and impregnation ratio on removal percentage of copper Cu(II) ions from aqueous solution and carbon yield were investigated. A quadratic model for adsorption percentage and a 2FI model for carbon yield were developed. The models were used to determine optimum process variables for production of activated carbon from the woody core of kenaf. From the analysis of variance (ANOVA), the most significant factor on each response of adsorption capacity and yield were identified. An activation temperature of (568±1)°C, activation time of 2.02 hours, and impregnation ratio of 1.75 were found as optimum production conditions. The experimental results showed excellent agreement with the predicted results obtained from a designed experiment that included the variables and responses of sorption capacity and yield. Textural properties of the prepared activated carbons were determined. The performance of the prepared activated carbon was further evaluated by fitting the equilibrium data with regression equations of Langmuir, Freundlich, and Temkin models at different temperatures. The research concluded that the prepared sorbent has good potential to remove Cu (II) ions from waste water.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Adsorption, Biomass, Central composite design, Equilibrium, Optimization, Activation temperatures, Activation time, Adsorption capacities, Carbon yield, Carbonization temperatures, Central composite designs, Designed experiments, Equilibrium data, Freundlich, Impregnation ratios, Kenaf (Hibiscus cannabinus L.), Langmuirs, Lignocellulosic wastes, Powdered activated carbon, Process Variables, Quadratic models, Regression equation, Sorption capacities, Temkin model, Textural properties, Woody core, Activated carbon, Agricultural wastes, Carbonization, Hemp, Impregnation, Phase equilibria
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 13 May 2013 01:56
Last Modified: 13 May 2013 01:56
URI: http://eprints.um.edu.my/id/eprint/6079

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