Water-dispersible magnetite-reduced graphene oxide composites for arsenic removal.
Magnetite-graphene hybrids have been synthesized via a chemical reaction with a magnetite particle size of approximately 10 nm. The composites are superparamagnetic at room temperature and can be separated by an external magnetic field. As compared to bare magnetite particles, the hybrids show a high binding capacity for As(III) and As(V), whose presence in the drinking water in wide areas of South Asia has been a huge problem. Their high binding capacity is due to the increased adsorption sites in the M-RGO composite which occurs by reducing the aggregation of bare magnetite. Since the composites show near complete (over 99.9%) arsenic removal within 1 ppb, they are practically usable for arsenic separation from water.
Chandra
Vimlesh
V
Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea.
Park
Jaesung
J
Chun
Young
Y
Lee
Jung Woo
JW
Hwang
In-Chul
IC
Kim
Kwang S
KS
D000042:Absorption; D001151:Arsenic / Q000737:chemistry / Q000302:isolation & purification*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D010087:Oxides; D014874:Water Pollutants, Chemical; D014867:Water; D006108:Graphite; D001151:Arsenic; D052203:Ferrosoferric Oxide