Journals Information
Environment and Ecology Research Vol. 11(2), pp. 313 - 327
DOI: 10.13189/eer.2023.110207
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Utilization of Agricultural Waste: A Case Study of Modified Rice Husk with Sorbic Acid to Remove Hexavalent Chromium Cr6+ from Aqueous Water
Ta Thi Huong *, Tran Y Doan Trang
HaUI Institute of Technology (HIT), Hanoi University of Industry, Vietnam
ABSTRACT
Hexavalent chromium (Cr6+) poisoning has been a serious concern for decades. Removal of Cr6+ in water in developing countries with simple and economical methods should be considered. Hence, the study aims to modify rice husk with sorbic acid (SRH) as an eco-friendly and economical adsorbent to remove Cr6+. The chemical structure and its surface morphology were investigated through Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM) analysis. Besides, driving effects among important independent variables were precisely carried out with pH (2-11), contact time (1-8 days), concentration dosage (1-4 g/L), and temperature (283-303K). The results indicate that SRH appeared in some new stretching vibration groups including OH- and COO- on FTIR analysis. Furthermore, its surface was shown significantly roughly with many deep holes in SEM analysis. It could be impressive evidence for efficient adsorption. It was demonstrated by the adsorption capacity being remarkably increased 鈥� being shown by the uptake efficiency of 99.9% Cr6+ at pH 2 and 4g/L concentration dosage with an initial Cr6+ concentration of 100 mg/L. In addition, the modeling study was well fitted with Langmuir, Freundlich, and Pseudo-second order through favorable coefficient correlation (R2). Its adsorption capacity was reported at 97.09 mg/g by the Langmuir model. For the thermodynamic study, its parameters indicate that the adsorption of Cr6+ is spontaneous and that physisorption contributes greatly to the removal of Cr6+.
KEYWORDS
Hexavalent Chromium, Rice Husk, Adsorption, Sorbic Acid, Removal, FTIR, SEM
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Ta Thi Huong , Tran Y Doan Trang , "Utilization of Agricultural Waste: A Case Study of Modified Rice Husk with Sorbic Acid to Remove Hexavalent Chromium Cr6+ from Aqueous Water," Environment and Ecology Research, Vol. 11, No. 2, pp. 313 - 327, 2023. DOI: 10.13189/eer.2023.110207.
(b). APA Format:
Ta Thi Huong , Tran Y Doan Trang (2023). Utilization of Agricultural Waste: A Case Study of Modified Rice Husk with Sorbic Acid to Remove Hexavalent Chromium Cr6+ from Aqueous Water. Environment and Ecology Research, 11(2), 313 - 327. DOI: 10.13189/eer.2023.110207.