Magnetic-watermelon rinds biochar for uranium-contaminated water treatment using an electromagnetic semi-batch column with removal mechanistic investigations. (January 2022)

• Record Type: Journal Article
• Authors: Lingamdinne, Lakshmi Prasanna; Choi, Jong-Soo; Angaru, Ganesh Kumar Reddy; Karri, Rama Rao; Yang, Jae-Kyu; Chang, Yoon-Young; Koduru, Janardhan Reddy
• Is Part Of: Chemosphere. Volume 286:Part 2(2022)
• Publication Date: 2022-01
• Subjects: Magnetized biochar -- Uranium -- Watermelon rind -- Adsorbent -- Biosorption -- Cost-effective -- Mechanism -- Wastewater -- Economic feasibility; BET Brunauer–Emmett–Teller -- FTIR Fourier transformed infrared -- HGMS High-gradient magnetic separation -- HR-TEM High-resolution transmission electron microscopy -- MWBC Magnetized watermelon rind biochar -- PFO Pseudo-first-order -- PSO Pseudo-second-order -- SEM Scanning electron microscope -- WBC Watermelon rind biochar -- WHO World Health Organization -- XPS X-ray photoelectron spectroscopy -- XRD X-ray diffraction -- SD Standard deviation; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.131776
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Biosorption using modified biochar has been increasingly adopted for the sustainable removal of uranium-contaminated from an aqueous solution. In this research study, the facile preparation and surface characteristics of magnetized biochar derived from waste watermelon rind to treat U(VI) contaminated water were investigated. The porosity, specific surface area, adsorption capacity, reusability, and stability were effectively improved after the magnetization of biochar. The kinetics and isotherm studies found that the U(VI) adsorption was rate-limiting monolayer sorption on the homogeneous surface of magnetized watermelon rind biochar (MWBC). The maximum adsorption capacity was found to be 323.56 mg of U(VI) per g of MWBC at pH 4.0 and 293 K that was higher than that of watermelon rind biochar (WBC) (135.86 mg g −1 ) and other sourced biochars. The surface interaction mechanism, environmental feasibility, applicability for real-filed water treatment studied in the electromagnetic semi-batch column, and reusability of MWBC were also explored. Furthermore, salient raised the ion exchange and complexation action capacity of MWBC due to the presence of Fe oxide. The overall results indicated that MWBC was not only inexpensive and had a high removal capacity for U(VI), but it also easily enabled phase separation from an aqueous solution, with more than three times reusability at a minimum removal capacity of 99%. Graphical abstract: Image 1 Highlights: Eco-friendly magnetic watermelon rind biochar (MWBC) produced at a low cost. Excellent adsorption capacity (323.56 mg g −1 ) for U(VI) at 86.35 m 2 g −1 surface area. Mechanistic studies well explained with suitable evidence. Effectively increased porosity, specific surface area, reusability, and stability. Semi-column tests proved feasibility and possible application of MWBC.