Widi Astuti(1), Triastuti Sulistyaningsih(2),

(1) Chemical Engineering Department, Universitas Negeri Semarang
(2) Chemistry Department, Universitas Negeri Semarang


The potential of chemically modified Kapok sawdust for methyl violet adsorption was investigated in a batch adsorption process. Various physicochemical parameters such as pH, contact time and initial dye concentration were studied. The adsorbent was characterized with Fourier transform infrared spectrophotometer, scanning electron microscope and Brunauer, Emmett and  Teller (BET) analysis. The optimum conditions for methyl violet adsorption were pH 5 and contact time 30 min. Langmuir, Freundlich and Redlich-Peterson isotherm model were used to analyze the equilibrium data. The experimental data fitted well with the Redlich-Peterson model, with the value of constants are 41.001 L g -1 for K R , 0.523 L 0.799 mg -0.799 for a and 0.799 for β


kapok sawdust, methyl violet, dye, adsorption

Full Text:



A. Hebeish, M.A. Ramadan, E. Abdel-Halim, A. Abo-Okeil, “An effective adsorbent based on 178

sawdust for removal of direct dye from aqueous solutions,” Clean Tech EnvironPolicy, vol. 13, 2011, pp. 713-718.

Y.S. Al-Degs, M.I. El-Barghouthi, A.H. El-Sheikh, G.M. Walker, “Effect of solution pH, ionic strength and temperature on adsorption behavior of reactive dyes on activated carbon,”Dyes and Pigments, vol. 77, 2008, pp. 16-23.

M.F.R. Pereira, S.F. Soares, J.J.M. Orfao, J.L. Figueiredo, “Adsorption of dyes on activated carbon : influence of surface chemical groups,“ Carbon, vol. 41, 2003, pp. 811-821.

P.C.C. Faria, J.J.M. Orfao, M.F.R. Pereira, “Adsorption of anionic and cationic dyes on activated carbon with different surface chemistries,” Water Res, vol. 38, 2004, pp. 2043-2052.

S. Li, “Removal of crystal violet from aqueous solution by sorption into semi-interpenetrated networks hydrogels constituted of poly(acrylic acid-acrylamide-methacrylate) and amylose,” Bioresource Technology, vol. 101, 2010, pp. 2197-2202.

A.E. Ofomaja, Y.S. Ho, “Effect of temperatures and pH on methyl violet biosorption by mansonia wood sawdust,” Bioresource Technology, vol. 99, 2008, pp. 5411-5417.

P.S. Kumar, S. Ramalingam, C. Senthamarai, M. Niranjanaa, P. Vijayalakshmi, S. Sivanes, “Adsorption of dye from aqueous solution by cashew nut shell : studies on equilibrium isotherm, kinetics and thermodynamics of interactions,” Desalination, vol. 261, 2010, pp. 52-69.

W. Zou, H. Bai, S. Gao, K. Li, “Characterization of modified sawdust, kinetic and equilibrium study about methylene blue adsorption in batch mode,” Korean J. Chem. Eng, vol. 30, no. 1, 2013, pp. 111-122.

M. Sciban, M. Klasnja, B. Skrbic, “Modified hardwood sawdust as adsorbent of heavy metal ions from water,” Wood Sci Technol, vol. 40, 2006, pp. 217-227.

W. Astuti, T. Sulistyaningsih, D.S. Fardhyanti, “Coal fly ash as a dual site material for Cr(VI) adsorption : comparation between single site and dual site isotherm models,” Advanced Material Research, 2015, vol. 1101, pp. 149-152.

Z. Wang, N. Bo, Y. Liu, G. Yang, Y. Liu, Y. Zhao, “Preparation of lignin based anion exchangers and their utilization for nitrate removal,” BioResources, 2013, vol. 8, no. 3, pp. 3505-3517.

M. Rafatullah, O. Sulaiman, R. Hashim, A. Ahmad, “Removal of cadmium (II) from aqueous solutions by adsorption using meranti wood,” Wood Sci Technol, 2012, vol. 46, pp. 221-241.

S.D. Khattri, M.K. Singh, “Colour removal from synthetic dye wastewater using a bioadsorbent,”Water, Air, and Soil Pollution, 2000, vol. 120, pp. 283-294.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License