ORIGINAL RESEARCH
Effect of Bronsted Base on Topological Alteration of Rice Husk as an Efficient Adsorbent Comparative to Rice Husk Ash for Azo Dyes
 
More details
Hide details
1
Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
 
2
Central Laboratory Complex, University of Veterinary and Animal Complex, Lahore, Pakistan
 
3
Department of Pharmacology, Central Park Medical College
 
4
Department of Clinical Medicine and Surgery, UVAS, Lahore, Pakistan
 
5
Department of Physiology, the University of Veterinary and Animal Sciences, Lahore, Pakistan
 
 
Submission date: 2019-07-19
 
 
Final revision date: 2019-09-06
 
 
Acceptance date: 2019-09-14
 
 
Online publication date: 2020-02-28
 
 
Publication date: 2020-04-21
 
 
Corresponding author
Rahat Naseer   

university of veterinary and animal sciences Lahore, IBBt, Pakistan
 
 
Pol. J. Environ. Stud. 2020;29(4):2795-2802
 
KEYWORDS
TOPICS
ABSTRACT
Rice husk (RH) is a notable fraction of lingo-cellulosic waste of paddy rice, abundantly available in rice-producing countries. In the last few years, rice husk ash, one of the processed products of the husk, has gained attention as an adsorbent. The present study the first time elucidates the adsorption kinetics of sodium hydroxide-treated rice husk, without recovering the dissolved sugars, onto cationic dye. The goal of the study was to investigate the implications of the alkali treatment on rice husk composition and structure and to compare its adsorption potential with rice husk ash. The effects of different concentrations of a base (2%, 4%, and 6%) and temperatures (25ºC, 70ºC, and 100ºC) were considered. Surface modification was assessed utilizing Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), followed by adsorption studies of malachite green using chemically modified rice husk (MRH) and rice husk ash (RHA). The results showed that even a mild treatment (4% NaOH) produces visible changes in the topology and bond vibrations. Although similar trends were observed in the case of adsorbent MRH and RHA, adsorbent I (MRH) proved to be an efficient adsorbent as compared to adsorbent II (RHA). MRH and RHA followed the pseudo second-order of reaction. The R2 value for RHA (0.8619 and 0.838) and MRH (0.038 and 0.987) in Langmuir and Freundlich isotherms suggested that RHA follows the principle of monolayer, whereas MRH shows the heterogeneity of binding sites.
eISSN:2083-5906
ISSN:1230-1485
Journals System - logo
Scroll to top