Decolorizaton of methylene blue dye using magnetic Ananas Comosus leaf

Siti Fairuz Ab Rashid, Zaiton Abdul Majid, Nursyafreena Attan

Abstract


The study was conducted to investigate the feasibility of using magnetic Ananas comosus leaf (MACL) as adsorbent for the removal of Methylene Blue (MB) dye. Ananas comosus leaf (ACL) was chosen due the availability of this waste material.The ACL was first pretreated with different concentration of nitric acid, HNO3 to compare its surface area before modification process. Following that, ACL with the highest surface area was selected to produce MACL by precipitation of iron oxide on the surface of ACL. Both adsorbents, ACL and MACL were characterized using Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), Scanning Electron microscopy (SEM) and Energy Dispersive X-Ray (EDX). The BET surface area of ACL and MACL recorded are 35.20 m2/g and 81.42 m2/g respectively. Equilibrium and kinetic studies were carried out under different pH of MB solution, adsorbent dosage, contact time and initial MB concentration. The equilibrium data were fitted to Langmuir and Freundlich isotherms. The equilibrium adsorption for both ACL and MACL were best described by the Langmuir isotherm, with MACL exhibiting a larger adsorption capacity compared to ACL. The sorption data was also analysed using pseudo-first-order and pseudo-second-order kinetic model. The experimental data obtained was found to follow pseudo-second-order with correlation coefficient R2 of 0.9889 and 0.9998 for ACL and MACL respectively.


Full Text:

PDF

References


Weng C.H., Lin Y.T., Tzeng T.W. (2009). Removal of methylene blue from aqueous solution by adsorption onto pineapple leaf powder, Journal of Hazardous Materials, 170, 417–424

Chen, M.C., Wu, J.Y., Huang, C.C., Liang, Y.M. and Hwang, S.C.J. (2003) Decolourization of azo dye using PVAimmobilized microorganisms, J. Biotechnol, 101, 241–252.

Rakesh Kumar Ghosh, D. Damodar Reddy. (2013). Tobacco Stem Ash as an Adsorbent for Removal of Methylene Blue from Aqueous Solution: Equilibrium, Kinetics, and Mechanism of Adsorption, Water Air Soil Pollut 224:1582, 1-12

Luiz C.A. Oliveira et.al. (2002). Activated carbon/iron oxide magnetic composites for the adsorption of contaminants in water, Carbon 40, 2177-2183

Nasuha N, Hameed B.H., Azam T. Mohd Din. (2010). Rejected tea as a potential low-cost adsorbent for removal of methylene blue, J. Hazard. Mater, 175, 126-132

Zhen, C., Wei, M. and Mei, H. (2008). Biosorption of Nickel and Copper onto treated alga (undaria pinnatifida): Application of isotherm and kinetic models. Journal of Hazardous Materials. 155. 327-333


Refbacks

  • There are currently no refbacks.


Copyright (c) 2016 eProceedings Chemistry

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Copyright © 2016 Department of Chemistry, Universiti Teknologi Malaysia.

Disclaimer : This website has been updated to the best of our knowledge to be accurate. However, Universiti Teknologi Malaysia shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.
Best viewed: Mozilla Firefox 4.0 & Google Chrome at 1024 × 768 resolution.