TY - JOUR
T1 - Waste foundry dust (WFD) as a reactive material for removing As(III) and Cr(VI) from aqueous solutions
AU - Rha, Sunwon
AU - Jo, Ho Young
N1 - Funding Information:
This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Subsurface Environment Management (SEM) Project, funded by Korea Ministry of Environment (MOE) ( 2018002440002 ) and through the Advanced Technology Program for Environmental Industry, funded by Korea Ministry of Environment (MOE) ( 2017000140010 ).
Publisher Copyright:
© 2021
PY - 2021/6/15
Y1 - 2021/6/15
N2 - This study evaluates the use of waste foundry dust (WFD) as a reactive material for mitigating water pollution using As(III) and Cr(VI) as model contaminants. A detailed structural characterization of WFD was performed using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). Batch removal experiments and kinetic studies for removal of both As(III) and Cr(VI) were conducted at various initial pH values (2–10), concentrations (1–100 mg/L), and solid-to-liquid ratios (2.5–125 g/L). The results show that WFD consisted of small particles (< 30 µm) with magnetic properties, mainly composed of quartz (SiO2) and magnetite (Fe3O4). The maximum removal capacity of WFD was 12.6 mg/g for As(III) at pH 3.0 and 6.1 mg/g for Cr(VI) at pH 5.0. WFD was effective in a wide pH range, from 3.0 to 8.0, and in high concentrations, up to 100 mg/L. WFD removed As(III) and Cr(VI) from aqueous solutions through complex processes including adsorption, precipitation, and redox reactions by oxidation of Fe(II). The results of this study suggest that WFD can be used as a reactive material for removal of As(III) and Cr(VI) from aqueous solutions.
AB - This study evaluates the use of waste foundry dust (WFD) as a reactive material for mitigating water pollution using As(III) and Cr(VI) as model contaminants. A detailed structural characterization of WFD was performed using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). Batch removal experiments and kinetic studies for removal of both As(III) and Cr(VI) were conducted at various initial pH values (2–10), concentrations (1–100 mg/L), and solid-to-liquid ratios (2.5–125 g/L). The results show that WFD consisted of small particles (< 30 µm) with magnetic properties, mainly composed of quartz (SiO2) and magnetite (Fe3O4). The maximum removal capacity of WFD was 12.6 mg/g for As(III) at pH 3.0 and 6.1 mg/g for Cr(VI) at pH 5.0. WFD was effective in a wide pH range, from 3.0 to 8.0, and in high concentrations, up to 100 mg/L. WFD removed As(III) and Cr(VI) from aqueous solutions through complex processes including adsorption, precipitation, and redox reactions by oxidation of Fe(II). The results of this study suggest that WFD can be used as a reactive material for removal of As(III) and Cr(VI) from aqueous solutions.
KW - Adsorption
KW - Arsenic
KW - Chromium
KW - Redox reaction
KW - Waste foundry dust
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85100523907&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2021.125290
DO - 10.1016/j.jhazmat.2021.125290
M3 - Article
C2 - 33951872
AN - SCOPUS:85100523907
SN - 0304-3894
VL - 412
JO - Journal of hazardous materials
JF - Journal of hazardous materials
M1 - 125290
ER -