Modifying Fe3O4 nanoparticles with humic acid for removal of Rhodamine B in water

作者：Peng, Liang^*; Qin, Pufeng; Lei, Ming; Zeng, Qingru; Song, Huijuan; Yang, Jiao; Shao, Jihai; Liao, Bohan; Gu, Jidong

来源：Journal of Hazardous Materials, 2012, 209: 193-198.

DOI：10.1016/j.jhazmat.2012.01.011

• Nano-Fe3O4
• Rhodamine B
• Nanostructure
• Separations
• Adsorption
• Interface

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 similar to 10 nm Fe3O4 cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2 emu/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 15 min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities of 161.8 mg/g. The Fe3O4/HA was able to remove over 98.5% of Rhodamin B in water at optimized pH.

• 出版日期2012-3-30
• 单位中南大学; 湖南农业大学