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Application of Scallop shell-Fe3O4 nanoparticles for the removal of Cr(VI) from aqueous solutions.
Mohagheghian, Azita; Vahidi-Kolur, Robabeh; Pourmohseni, Melina; Yang, Jae-Kyu; Shirzad-Siboni, Mehdi.
Afiliación
  • Mohagheghian A; Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran E-mail: mshirzadsiboni@yahoo.com.
  • Vahidi-Kolur R; Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran E-mail: mshirzadsiboni@yahoo.com.
  • Pourmohseni M; Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran E-mail: mshirzadsiboni@yahoo.com.
  • Yang JK; Ingenium College, Kwangwoon University 20 Kwangun-ro, Nowon-Gu, Seoul, Korea 01897.
  • Shirzad-Siboni M; Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran E-mail: mshirzadsiboni@yahoo.com; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran and Research Center of Hea
Water Sci Technol ; 75(10): 2369-2380, 2017 May.
Article en En | MEDLINE | ID: mdl-28541945
In this study, removal of Cr(VI) by Scallop shell-Fe3O4 nanoparticles was investigated with variation of pH, adsorbent dosage, initial Cr(VI) concentration, ionic strength and temperature. Coating of Fe3O4 nanoparticles onto Scallop shell was identified by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The maximum adsorption was observed at pH 3. Removal efficiency of Cr(VI) was increased with increasing adsorbent dosage, but was decreased with increasing initial Cr(VI) concentration and temperature. Removal efficiency of Cr(VI) was decreased in the presence of sulfate and carbonate ions. Adsorption kinetic study revealed that a pseudo-second order model better described the removal data than a pseudo-first order model and an intra-particle diffusion model. Maximum adsorption capacity was estimated to be 34.48 mg/g. Thermodynamic studies indicated that adsorption of Cr(VI) onto Scallop shell-Fe3O4 nanoparticles occurred via an exothermic (ΔH = -320.88 KJ mol-1) process. Adsorption efficiency of Cr(VI) by Scallop shell-Fe3O4 nanoparticles was maintained even after eight successive cycles.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Cromo / Purificación del Agua / Nanopartículas Límite: Animals Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Cromo / Purificación del Agua / Nanopartículas Límite: Animals Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido