期刊论文

Peng, Liang

英文

Journal of Hazardous Materials

0304-3894

2012

209-210

193-198

10.1016/j.jhazmat.2012.01.011

National Natural Science Foundation of China [21007014, 21107024]; Start Foundation of Hunan Agricultural University [10YJ01]; National Science and Technology Major Projects [2009ZX07212-001-05]; National Environmental Protection Public Welfare Program [201009047]; Key Laboratory of Production Environment; Agro-product Safety of Ministry of Agriculture, Tianjin Key Laboratory of Agro-environment and Food Safety [2010-KJ-KF-03]; Scientific Research Fund of Hunan Provincial Education Department [11C0650]

本校为第一且通讯机构

Humic acid (HA) modifying Fe<inf>3</inf>O<inf>4</inf> nanoparticles (Fe<inf>3</inf>O<inf>4</inf>/HA) was developed for removal of Rhodamine B from water. Fe<inf>3</inf>O<inf>4</inf>/HA was prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TEM images revealed the Fe<inf>3</inf>O<inf>4</inf>/HA (with ~10nm Fe<inf>3</inf>O<inf>4</inf> cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2emu/g, the Fe<inf>3</inf>O<inf>4</inf>/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<inf>3</inf>O<inf>4</inf>/HA reached equilibrium in less than 15min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities of 161.8mg/g. The Fe<inf>3</inf>O<inf>4</inf>/HA was able to remove over 98.5% of Rhodamin B in water at optimized pH. &copy;2012 Elsevier B.V.