High performance B 2 O 3 /MWCNTs and TiB/MWCNTs nano-adsorbents for the co-sorption of cyanide and phenol from refinery wastewater.

Autor: Kariim I; Chemical Engineering Department, Federal University of Technology P.M. B. 65 Minna Nigeria kasaka2003@futminna.edu.ng., Abdulkareem AS; Chemical Engineering Department, Federal University of Technology P.M. B. 65 Minna Nigeria kasaka2003@futminna.edu.ng.; Nanotechnology Research Group, Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology P. M. B. 65 Minna Nigeria., Isa RO; Chemical Engineering Department, Federal University of Technology P.M. B. 65 Minna Nigeria kasaka2003@futminna.edu.ng., Tijani JO; Nanotechnology Research Group, Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology P. M. B. 65 Minna Nigeria.; Department of Chemistry, Federal University of Technology P. M. B. 65 Minna Nigeria., Abubakre OK; Nanotechnology Research Group, Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology P. M. B. 65 Minna Nigeria.; Department of Material and Metallurgy Engineering, Federal University of Technology P. M. B. 65 Minna Nigeria., Usman MO; Department of Chemistry, Makerere University Uganda.; Department of Chemistry, Confluence University of Science and Technology P. M. B. 1040 Osara Kogi State Nigeria., Ezzat AO; Department of Chemistry, College of Sciences, King Saud University Riyadh 11451 Saudi Arabia., Al-Lohedan HA; Department of Chemistry, College of Sciences, King Saud University Riyadh 11451 Saudi Arabia., Sayed SRM; Department of Botany and Microbiology, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia., Egbosiuba TC; Artie McFerrin Department of Chemical Engineering, Texas A&M University College Station TX 77843 USA.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2024 Aug 19; Vol. 14 (36), pp. 26016-26031. Date of Electronic Publication: 2024 Aug 19 (Print Publication: 2024).
DOI: 10.1039/d4ra04313h
Abstrakt: The refinery industry has witnessed tremendous activity aimed at producing petrochemicals for the benefit of the teeming populace. These activities are accompanied by the discharge of wastewater containing chemical substances and elements that have negative impacts on the ecosystem. The presence of phenol and cyanide contaminants in refinery wastewater poses serious health hazards to humans, necessitating their removal. In this study, boron oxide-doped multi-walled carbon nanotubes (B 2 O 3 /MWCNTs) and titanium boride-doped MWCNT (TiB/MWCNTs) nanoadsorbents were prepared via a wet impregnation method and characterized using High-Resolution Transmission Electron Microscopy (HR-TEM), X-Ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS). HR-TEM images depict the nanostructure of the nanoadsorbent, the presence of doped materials, and the internal, external, and wall thickness of B 2 O 3 /MWCNTs and TiB/MWCNTs nanoadsorbents. XRD results indicate that the nanomaterials were monocrystalline with average crystallite sizes of 22.75 nm and 16.79 nm for B 2 O 3 /MWCNTs and TiB/MWCNTs, respectively. The formation of B 2 O 3 and TiB was observable in the results obtained from the XPS at the binding energy of 192 and 193.1 eV, respectively. The application of the produced B 2 O 3 /MWCNTs and TiB/MWCNTs nanoadsorbents for the removal of phenol and cyanide from refinery wastewater was explored in a batch adsorption system. The effects of contact time, adsorbent dosage, and adsorption temperature were investigated. To the best of our knowledge, the incorporation of B 2 O 3 and TiB in MWCNTs resulted in the highest adsorption capacities for phenol and cyanide from aqueous solutions. The highest percentage removal of 100% for phenol and 99.06% for cyanide was observed for the TiB/MWCNTs nanoadsorbent at a residence time of 70 minutes, a temperature of 60 °C, and 0.3 g of adsorbent. The isotherm models show that cyanide and phenol removal obeyed the Langmuir isotherm, indicating monolayer adsorption over B 2 O 3 /MWCNTs nanoadsorbent. Furthermore, cyanide and phenol removal depict multilayer adsorption on the TiB/MWCNT nanoadsorbent. The research shows that B 2 O 3 /MWCNTs are proficient in cyanide sorption, while TiB/MWCNT favors phenol sorption due to their respective adsorption capacities.
Competing Interests: The authors declare no conflict of interest.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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