Potential electromagnetic column treatment of heavy metal contaminated water using porous Gd2O3-doped graphene oxide nanocomposite: Characterization and surface interaction mechanisms. (June 2021)

• Record Type: Journal Article
• Authors: Lee, Suhyun; Lingamdinne, Lakshmi Prasanna; Yang, Jae-Kyu; Chang, Yoon-Young; Koduru, Janardhan Reddy
• Is Part Of: Journal of water process engineering. Volume 41(2021)
• Publication Date: 2021-06
• Subjects: BET Brunauer-Emmett-Teller -- DETA diethylenetriamine -- DLM diffuse layer model -- EDX energy-dispersive X-ray -- EPA Environmental Protection Agency -- FT-IR Fourier-transform infrared -- GGO GdO3-doped GO -- GO graphene oxide -- HGMS high gradient magnetic separation -- ICP-OES inductively coupled plasma optical emission spectroscopy -- MPMS magnetic property measurement system -- PFO pseudo-first order -- PSO pseudo-second-order -- SEM scanning electron microscopy -- SD standard deviation -- TEM transmission electron microscopy -- XRD X-ray diffraction -- XPS X-ray photoelectron spectroscopy; Gd2O3-GO -- adsorptive treatment -- Pb(II), Cr(III) -- Surface water -- nanocomposite material -- Characterization; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2021.102083
• Languages: English
• ISSNs: 2214-7144

Abstract

Highlights: Facile prepared magnetic porous Gd2 O3 -doped GO (GGO) nanocomposite. GGO was well characterized using XRD, MPMS, FT-IR, XPS, SEM and TEM. The surface complexation adsorption mechanism of GGO for metals was well explained. GGO well applied to the real field contaminated surface water treatment using Electromagnetic column. GGO can be re-used for up to 3 cycles with adsorption capacity (> 95 %) under EPA standards. Abstract: Water contamination by heavy metal is a global issue. Here, used a facile method to prepare a porous hybrid nanomaterial of magnetic Gd2 O3 -doped graphene oxide (GGO) for remediation of water contaminated with Cr(III) and Pb(II). The structure and surface morphology of GGO were well characterized using XRD, magnetic measurement, FT-IR, XPS, SEM, and TEM data. Its surface area is larger compared to bare graphene oxide (GO) and iron oxide-doped GO, and the active surface functional groups enhance its adsorptive ability. The performance of GGO is significantly influenced by the pH, adsorbent dosage, initial metal concentration, and rate-limiting kinetics on homogeneous surfaces. Gd2 O3 doping enhanced the adsorption ability of GO, achieving the respective maximum capacities of 17.97 and 83.04 mg/g for Cr(III) and Pb(II) at 0.5 g/L GGO, pH 4.0, 298 K, and 180 min. When GGO was applied to real water samples, the adsorptive removal rate satisfied the US EPA standards, and the material can be reused up to 3 cycles with more than 95 % and 70 % removal for Cr(III) and Pb(II), respectively. Therefore, GGO can be used for the potential removal of anions and cations from wastewater, including industrial effluents and groundwater.