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Enhanced termination of zinc and cadmium ions from wastewater employing plain and chitosan-modified mxenes:synthesis,characterization,and adsorption performance

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Green Chemical Engineering 2024年第3期5卷 339-347页

作者： njood r.a.eez Suhaib S.Salih Mohammed Kadhom Harith N.Mohammed Tushar K.Ghosh Department of Chemical Engineering College of EngineeringUniversity of TikritTikrit34001Iraq Department of Environmental Science College of Energy and Environmental ScienceAl-Karkh University of ScienceBaghdad10081Iraq Department of Nuclear Science&Engineering Institute University of Missouri-Columbia416 S.Sixth StreetE 2434 Lafferre HallColumbiaMO65211United States

Zinc and cadmium pollutants cause a significant environmental effect that cannot be *** to their considerable amount in an aqueous environment,industries are seeking suitable adsorbents that are environmentally friendly and inexpensive for removing metals from wastewater before disposing of them in surface *** research employed original MXene(MX)and chitosan-modified MXene(CSMX)to extract zinc(Zn(Ⅱ))and cadmium(Cd(Ⅱ))metal ions from water-based *** composite material produced was analyzed using techniques such as X-ray Diffraction(XrD),Scanning Electron Microscopy(SEM),Fourier Transform Infrared Spectroscopy(FTIr),and Brunauer-Emmett-Teller(BET).The effects of contact duration,p H of the solution,and initial concentration of metal ions on the adsorption process of Zn(Ⅱ)and Cd(Ⅱ)onto both MX and CSMX composites were *** and prepared CSMX composite presented a high adsorption capacity for both studied heavy metals,which were 91.55 and 73.82 mg/g for Zn(Ⅱ)and Cd(Ⅱ)onto MX,106.84 and 93.07 mg/g for Cd(Ⅱ)and Zn(Ⅱ)onto CSMX composite,***,the maximum competitive adsorption capacities for Zn(Ⅱ)onto MX and CSMX composites are 77.29 and 93.47 mg/g,and for are Cd(Ⅱ)60.30 and 79.66 mg/g,***,the removal capacities for both single and competitive metal ions were superior to CSMX ***,the adsorption capacities after five successive regeneration sequences were only dropped by 13.2%for Zn(Ⅱ)and 17.4%for Cd(Ⅱ)onto the CSMX composite compared to the first *** results confirm that both metals could be efficiently terminated from wastewater,which makes the prepared CSMX composite a favorable candidate adsorbent in practical applications.

关键词： Adsorption Chitosan MXene Zn(Ⅱ) Cd(Ⅱ) Wastewater

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