title: Magnetic mesoporous Fe/carbon aerogel structures with enhanced arsenic removal efficiency.
abstract: Wastewater treatment has drawn significant research attention due to its associated environmental issues. Adsorption is a promising method for treating wastewater. The development of an adsorbent with a high surface area is important. Therefore, we successfully developed mesoporous Fe/carbon aerogel (CA) structures with high specific surface areas of 48 7m(2)/g via the carbonization of composite Fe3O4/phenol-formaldehyde resin structures, which were prepared using a hydrothermal process with the addition of phenol. The mesoporous Fe/CA structures were further used for the adsorption of arsenic ions with a maximum arsenic-ion uptake of calculated 216.9 mg/g, which is higher than that observed for other arsenic adsorbents. Ferromagnetic behavior was observed for the as-prepared mesoporous Fe/CA structures with an excellent response to applied external magnetic fields. As a result, the adsorbent Fe/CA structures can be easily separated from the solution using an external magnetic field. This study develops the mesoporous Fe/CA structures with high specific surface areas and an excellent response to an applied external magnetic field to provide a feasible approach for wastewater treatment including the removal of arsenic ions.
authors.affiliation: Department of Chemical Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli 32023, Taiwan, ROC. Electronic address: yflin@cycu.edu.tw.
authors.forename: Yi-Feng
authors.initials: YF
authors.lastname: Lin
authors.affiliation: Department of Chemical Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli 32023, Taiwan, ROC.
authors.forename: Jia-Ling
authors.initials: JL
authors.lastname: Chen
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005557:Formaldehyde / Q000737:chemistry*; D005782:Gels / Q000737:chemistry; D010636:Phenols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D001151:Arsenic; D002244:Carbon; D005290:Ferric Compounds; D005557:Formaldehyde; D005782:Gels; D010636:Phenols; D011108:Polymers; D062065:Wastewater; D014874:Water Pollutants, Chemical; C000499:ferric oxide; C011529:phenol-formaldehyde resin
keywords: Adsorption; Arsenic ions; Fe/carbon aerogels; Mesoporous; Surface area