Insights into manganese ferrite anchored graphene oxide to remove Cd(II) and U(VI) via batch and semi-batch columns and its potential antibacterial applications. (January 2023)

• Record Type: Journal Article
• Authors: Lingamdinne, Lakshmi Prasanna; Lebaka, Veeranjaneya Reddy; Koduru, Janardhan Reddy; Chang, Yoon-Young
• Is Part Of: Chemosphere. Volume 310(2023)
• Publication Date: 2023-01
• Subjects: Heavy metals -- Water treatment -- Nanocomposite -- Characterization -- Thermodynamics -- Surface mechanism; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.136888
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The bioaccumulation, non-biodegradability, and high toxicity of Cd(II) and U(VI) in water is a serious concerns. Manganese ferrite/graphene oxide (GMF) nanocomposites were synthesized, characterized, and used to efficiently remove Cd(II) and U(VI) from an aqueous solution in this study. X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS) analyses, respectively, confirmed the formation of GMF and the adsorptive removal mechanism. The XRD results revealed an amorphous structure when MnFe2 O4 was loaded onto the GO surface. XPS results suggest that C = C, C − O o r O H, and metal oxides are responsible for the removal of Cd(II) and U(VI) via electrostatic and chemical interaction. According to the Brunauer Emmett and Teller (BET), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) characterization analysis, GMF has a high surface area (117.78 m 2 /g) and a spherical shape with even distribution. The kinetics data were successfully reproduced by a pseudo-second-order non-linear model indicating the complexity of the sorption mechanism was rate-limiting. The maximum Langmuir uptake ability of GMF for Cd(II) and U(VI) was calculated to be 232.56 mg/g and 201.65 mg/g, respectively. Using external magnetic power, the prepared GMF can easily separate from the aqueous solution and can keep both metal ions under Environmental protection agency standards in water for up to six cycles of re-use of GMF. Finally, the GMF nanocomposite demonstrated significant promise as an adsorbent for removing Cd(II) and U(VI) from actual contaminated water samples. The antibacterial test was expanded to include gram-negative E. coli and gram-positive S. aureus to better understand GMF's bacterial inhibition efficacy. Graphical abstract: Image 1 Highlights: Simple synthesis of a GMF nanocomposite with a high surface area (117.78 m 2 /g). GMF removes Cd(II) (232.56 mg/g) and U(VI) (201.65 mg/g) from water efficiently. The GMF well applied in semi-batch column via electromagnetic systems for real water. The GMF's antibacterial activity has been well established. Well studied metal removal mechanism, environmental& economic feasibility of GMF.