Chemical Regeneration of Modified Magnetic-PEI-Cellulose Adsorbent for Removal of Anionic Reactive Black 5 Dyes
Abu Hassan Nordin1, Norzita Ngadi2, Zurina Mohamad3, Mazura Jusoh4, Agus Arsad5
1Abu Hassan Nordin, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
2Norzita Ngadi, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
3Zurina Mohamad, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
4Mazura Jusoh, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
5Agus Arsad, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
Manuscript received on 10 May 2019 | Revised Manuscript received on 19 May 2019 | Manuscript Published on 23 May 2019 | PP: 1629-1632 | Volume-7 Issue-6S5 April 2019 | Retrieval Number: F12890476S519/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Adsorption process has been heavily used to remove pollutants from waters and wastewaters. However, the economical competitiveness of the adsorption process depends upon the reusability of exhausted adsorbent. This study investigated the chemical regeneration of magnetic-PEI-cellulose adsorbent presaturated with dyestuffs by using two different regenerants which are hydrochloric acids (HCl) and sodium hydroxide bases (NaOH) using batch experiments. The magnetic-PEI-cellulose adsorbent was synthesized by using crosslinking method. Adsorption experiment was conducted to remove a constant 0.1 g/L of anionic reactive black 5 (RB5) dyes and desorption experiment was conducted by regenerating dye loaded adsorbent using HCl and NaOH regenerants at 0.1, 1.0 and 5.0 mol L-1. From the batch desorption test results, 5 mol L-1 of HCl was found to be the optimal regenerant for the RB5 dyes. A higher concentration of acidic regenerant could improve the dye adsorption efficiencies up to 4 times of cycles with adsorption efficiency (74.9%). Meanwhile, basic regenerant has low capability to desorb RB5 dyes and the lower concentration of NaOH (0.1 mol L-1) showed better adsorption performance after 4 times of cycles with adsorption efficiency (1.9%). Therefore, acidic regenerant indicates better results to be used as to desorb RB5 dyes from magnetic-PEI-cellulose adsorbent.
Keywords: Low-Cost, Adsorption, Adsorption Efficiency, Desorption, Dye Wastewater, Regenerants.
Scope of the Article: Bio-Science and Bio-Technology