Abstract
Humic acid (HA) modifying Fe3O4 nanoparticles (Fe3O4/HA) was developed for removal of Rhodamine B from water. Fe3O4/HA was prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TEM images revealed the Fe3O4/HA (with ~10nm Fe3O4 cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2emu/g, the Fe3O4/HA could be simply recovered from water with magnetic separations at low magnetic field gradients within a few minutes. Sorption of the Rhodamine B to Fe3O4/HA reached equilibrium in less than 15min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities of 161.8mg/g. The Fe3O4/HA was able to remove over 98.5% of Rhodamin B in water at optimized pH.
Original language | English |
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Pages (from-to) | 193-198 |
Number of pages | 6 |
Journal | Journal of Hazardous Materials |
Volume | 209-210 |
DOIs | |
State | Published - 30 Mar 2012 |
Externally published | Yes |
Keywords
- Adsorption
- Interface
- Nanostructure
- Rhodamine B
- Separations