Modifying Fe3O4 nanoparticles with humic acid for removal of Rhodamine B in water.
Humic acid (HA) modifying Fe(3)O(4) nanoparticles (Fe(3)O(4)/HA) was developed for removal of Rhodamine B from water. Fe(3)O(4)/HA was prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TEM images revealed the Fe(3)O(4)/HA (with ≈ 10 nm Fe(3)O(4) cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2 emu/g, the Fe(3)O(4)/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 Fe(3)O(4)/HA reached equilibrium in less than 15 min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities of 161.8 mg/g. The Fe(3)O(4)/HA was able to remove over 98.5% of Rhodamin B in water at optimized pH.
Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China. pengliang@hunau.net
Liang
L
Peng
Pufeng
P
Qin
Ming
M
Lei
Qingru
Q
Zeng
Huijuan
H
Song
Jiao
J
Yang
Jihai
J
Shao
Bohan
B
Liao
Jidong
J
Gu
D005290:Ferric Compounds / Q000737:chemistry*; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D012235:Rhodamines / Q000302:isolation & purification*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D005290:Ferric Compounds; D006812:Humic Substances; D012235:Rhodamines; D014874:Water Pollutants, Chemical; C000499:ferric oxide; C029773:rhodamine B