Comparative Adsorption Studies on Raw Rice Husk, Acid Leached Rice Husk and Base Leached Rice Husk by Using Methylene Blue as Dye

Authors

  • Manju D. Tanwar Five Elements Environment Ventures Pvt. Ltd., Mahape, Navi Mumbai, Maharashtra 400701
  • Yogita V. Gaykar K.J. Somaiya College of Science and Commerce, Vidyavihar, Mumbai, Maharashtra 400077
  • Yashas Bhand Five Elements Environment Ventures Pvt. Ltd., Mahape, Navi Mumbai, Maharashtra 400701

Abstract

Current methods for removing dyes from wastewaters are costly and cannot effectively be used to treat wide range of such wastewaters. This work describes the use of raw rice husk (RRH), acid-leached rice husk (ALRH) and base-leached rice husk (BLRH) as adsorbents for decolorization. Characterization of raw rice was done by powder X-ray diffraction (P-XRD) analysis, surface area analysis and scanning electron microscopy. Raw rice husk was collected directly from factory, ALRH was prepared from rice husk treated with hydrochloric acid (0.1N HCl) and BLRH was prepared from rice husk treated with sodium hydroxide (0.1N NaOH). Their adsorption capacity was evaluated for the decolorization of methylene blue solution (1mg/l). The effect of different parameters such as volume of adsorbate, dosage of adsorbent, initial pH and contact time were investigated. After characterization it was observed that, surface area of raw rice husk involves physical adsorption that lead to multilayer adsorption, by scanning electron microscope (SEM, JEOL JSM-6480 LV) equipped with an energy dispersive X-ray spectrometer (EDX) revealed the irregular and porous surface of rice husk suitable for adsorption. Removal efficiency was found to be 92% at dose of 1 g with contact time 45 min for RRH, 94% removal efficiency at dose 3 g with contact time 15 min for ALRH and 94% removal efficiency at dose 1 g with 15 min for BLRH. With respect to cost feasibility and environmental concern. RRH could be employed as the more effective low cost bioadsorbent for removal of methylene blue.

 

Keywords: Raw rice husk, acid leached rice husk, base leached rice husk, dye removal, adsorption, methylene blue.

 

Downloads

Published

2019-04-15

Issue

Vol. 2 No. 1 (2015)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.