Facile synthesis of pectin-stabilized magnetic graphene oxide Prussian blue nanocomposites for selective cesium removal from aqueous solution.
This work focused on the development of pectin-stabilized magnetic graphene oxide Prussian blue (PSMGPB) nanocomposites for removal of cesium from wastewater. The PSMGPB nanocomposite showed an improved adsorption capacity of 1.609mmol/g for cesium, compared with magnetic graphene oxide Prussian blue, magnetic pectin Prussian blue, and magnetic Prussian blue nanocomposites, which exhibited adsorption capacities of 1.230, 0.901, and 0.330mmol/g, respectively. Increased adsorption capacity of PSMGPB nanocomposites was attributed to the pectin-stabilized separation of graphene oxide sheets and enhanced distribution of magnetites on the graphene oxide surface. Scanning electron microscopy images showed the effective separation of graphene oxide sheets due to the incorporation of pectin. The optimum temperature and pH for adsorption were 30°C and 7.0, respectively. A thermodynamic study indicated the spontaneous and the exothermic nature of cesium adsorption. Based on non-linear regression, the Langmuir isotherm fitted the experimental data better than the Freundlich and Tempkin models.
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-Gu, Daegu 41566, Republic of Korea.
Avinash A
AA
Kadam
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-Gu, Daegu 41566, Republic of Korea.
Jiseon
J
Jang
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-Gu, Daegu 41566, Republic of Korea. Electronic address: daesung@knu.ac.kr.
Dae Sung
DS
Lee
D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry; D002586:Cesium / Q000302:isolation & purification*; D004396:Coloring Agents / Q000737:chemistry; D005295:Ferrocyanides / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D010368:Pectins / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013816:Thermodynamics; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*; D014961:X-Ray Diffraction
D000814:Aniline Compounds; D002586:Cesium; D004396:Coloring Agents; D005295:Ferrocyanides; D006108:Graphite; D010368:Pectins; D062065:Wastewater; D014874:Water Pollutants, Chemical; D014875:Water Pollutants, Radioactive; C416807:polyaniline; C000170:ferric ferrocyanide
Adsorption; Graphene oxide; Magnetic nanoparticles; Pectin; Radioactive cesium