In this study, the effects of the coating temperature during the preparation of manganese-coated sand (MCS) and iron-coated sand (ICS) on the removals of As(III) and As(V) were evaluated. The mineral type of manganese oxide on MCS-150, prepared at 150 °C, was identified as a mixture of pyrolusite and ramsdellite, which changed to high crystalline pyrolusite above 300 °C. The mineral type of ICS-150, prepared at 150 °C, was a mixture of goethite and hematite, which changed to high crystalline goethite above 300 °C. The adsorption efficiency was determined according to the mineral type which depended on the coating temperature. The As(III) oxidation efficiency of MCS-150 and As(V) adsorption efficiency of ICS-150 were approximately 77 and 70% higher compared with those of MCS-600 and ICS-600, respectively, prepared at 600 °C. Regardless of the coating temperature, the amounts of manganese and iron coated on the sand substrates were similar.
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Research Article|
February 01 2012
Removal of arsenic from aqueous solution by iron-coated sand and manganese-coated sand having different mineral types
Yoon-Young Chang
;
Yoon-Young Chang
*
Department of Environmental Engineering, Kwangwoon University, Seoul, Korea
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Ki-Hoon Song
;
Ki-Hoon Song
*
Department of Environmental Engineering, Kwangwoon University, Seoul, Korea
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Mok-Ryun Yu
;
Mok-Ryun Yu
*
Department of Environmental Engineering, Kwangwoon University, Seoul, Korea
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Jae-Kyu Yang
**
Division of General Education, Kwangwoon University, Seoul, Korea
E-mail: jkyang@kw.ac.kr
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Water Sci Technol (2012) 65 (4): 683-688.
Article history
Received:
July 01 2011
Accepted:
October 12 2011
Citation
Yoon-Young Chang, Ki-Hoon Song, Mok-Ryun Yu, Jae-Kyu Yang; Removal of arsenic from aqueous solution by iron-coated sand and manganese-coated sand having different mineral types. Water Sci Technol 1 February 2012; 65 (4): 683–688. doi: https://doi.org/10.2166/wst.2012.910
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Yoon-Young Chang, Ki-Hoon Song, Mok-Ryun Yu, Jae-Kyu Yang; Removal of arsenic from aqueous solution by iron-coated sand and manganese-coated sand having different mineral types. Water Sci Technol 1 February 2012; 65 (4): 683–688. doi: https://doi.org/10.2166/wst.2012.910
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