Optimization of the adsorption of total organic carbon from produced water using functionalized multi-walled carbon nanotubes

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dc.contributor.authorAdewoye, Tunmise L.
dc.contributor.authorOgunleye, Oladipupo O.
dc.contributor.authorAbdulkareem, Ambali S.
dc.contributor.authorSalawudeen, Taofeeq O.
dc.contributor.authorTijani, Jimoh O.
dc.date.accessioned2023-07-13T07:39:02Z
dc.date.available2023-07-13T07:39:02Z
dc.date.issued2021-01
dc.description.abstractThis study investigated the removal of Total Organic Carbon (TOC) from produced water by batch adsorption process using adsorbents developed from Multi-Walled Carbon Nanotubes (MWCNTs). The MWCNTs, synthesized by catalytic chemical vapour deposition method using kaolin-supported tri-metallic (iron-cobalt-nickel) catalyst were purified by H2SO4/HNO3 and then functionalized with 1-pyrenebutanoic acid N-hydroxyl succinimidyl ester (PSE). The raw, purified and functionalized MWCNTs were characterized by High Resolution Scanning Electron Microscopy (HRSEM), High Resolution Transmission Electron Microscopy (HRTEM), Brunauer–Emmett-Teller (BET) and Fourier Transform Infrared Spectroscopy (FTIR). In the results, HRSEM/HRTEM revealed the structure, purity and also confirmed the attachment of the PSE molecule onto the nano-adsorbent(s). The BET surface areas of MWCNTs, PMWCNTs and FMWCNTs were 970.17, 869.25 and 831.80 m2/g, respectively while the FTIR established the existence of surface functional groups. The functionalized MWCNTs (FMWCNTs) nano-adsorbent showed superior performance efficiency (93.6%) than the purified MWCNTs (PMWCNTs) (79.2%) as examined under the same batch adsorption condition: 0.02 g adsorbent dosage, 10–90 min contact time and 30 °C solution temperature probably, due the improved wettability resulted from incorporation of PSE. Subsequently, Central Composite Design (CCD) was applied to optimize the process parameters for the sorption of TOC onto FMWCNTs. The CCD in the response surface methodology predicted 260 mg/g adsorption capacity of FMWCNTs in the removal of TOC at the optimum condition of 49.70 min contact time, 34.81 °C solution temperature, and 0.02 g adsorbent dosage. The kinetics data were best described by pseudo-second-order model and thermodynamic parameters suggested that the process was feasible, spontaneous and exothermic. It can be inferred from the various analysis conducted that the developed FMWCNTs nano-adsorbent is effective for removal of TOC from oil-produced water and may be explored for removal of organic contaminants from other industrial wastewater.en_US
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/20.500.12484/11457
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectNano-adsorbenten_US
dc.subjectCVDen_US
dc.subjectMWCNTsen_US
dc.subjectAdsorptionen_US
dc.subjectProduced wateren_US
dc.subjectOptimizationen_US
dc.titleOptimization of the adsorption of total organic carbon from produced water using functionalized multi-walled carbon nanotubesen_US
dc.typeArticleen_US

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