VALORIZATION AND CHARACTERIZATION OF WOOD OF THE JUJUBE SHELL: APPLICATION TO THE REMOVAL OF CATIONIC DYE FROM AQUEOUS SOLUTION

• Published in: Journal of engineering science & technology Vol. 12; no. 2; pp. 423 - 438
• Main Authors: N. EL MESSAOUDI, M. EL KHOMRI, A. LACHERAI, S. BENTAHAR, A. DBIK, B. BAKIZ
• Format: Journal Article
• Language: English
• Published: Taylor's University 01-02-2017
• Subjects: Biosorption; Crystal violet; Isotherms; Jujube shell; Kinetic
• ISSN: 1823-4690

In the present study, the powder of jujube shell (raw and modified) was tested for removing crystal violet (CV)from aqueous solution. The biosorbents were characterized by FTIR, SEM and pHZPC analysis.The biosorption behavior was studied in batch experiments such as biosorbent mass, contact time, temperature, initial dye pH, biosorbent particles size and initial dye concentration. The removal efficiency of crystal violet attained 95.84% and 98.16 %, using 0.2g of raw jujube shell (JS) of and 0.1g of modified jujube shell with sodium hydroxide (NMJS), respectively. The obtained results indicate the endothermic nature of biosorption and that the biosorption system studied belongs to the second-order kinetic model. Equilibrium data of the biosorption process fitted very well to Langmuir model. The maximum biosorption monolayer capacities of crystal violet on raw and modified jujube shell were found to be 59.84 mg/g and 288.18 mg/g at 50°C, respectively. Thus, the raw jujube shell treatment with base is very effective and greatly improves the dye adsorption capacity.