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http://dx.doi.org/10.7844/kirr.2014.23.6.22

Preparation of Iron Nano-particle by Slurry Reduction Method from Leaching Solution of Spent Nd magnet  

Ahn, Jong-Gwan (Department of Resource Recycling and Environmental Engineering, Jungwon University)
Gang, Ryunji (Department of Resource Recycling and Environmental Engineering, Jungwon University)
You, Haebin (Department of Resource Recycling and Environmental Engineering, Jungwon University)
Yoon, Ho-Sung (Mineral Resource Research, Korea Institute of Geoscience and Resources)
Publication Information
Resources Recycling / v.23, no.6, 2014 , pp. 22-29 More about this Journal
Abstract
Recycling process of iron should be developed for efficient recovery of neodymium (Nd), rare metal, from acid-leaching solution of Nd magnet. In this study, $FeCl_3$ solution as iron source was used for preparation of iron nano particles with the condition of various factors, such as, reductant, and surfactant. $Na_4P_2O_7$ and Polyvinylpyrrolidone (PVP) as surfactants, $NaBH_4$ as reductant, and palladium chloride ($PdCl_2$) as a nucleation seed were used. Iron powder was analyzed by using XRD, SEM for measuring shape and size. Iron nano particles were prepared at the ratio of 1:5 (Fe (III) : $NaBH_4$). Size and shape of iron particles were round-form and 50 ~ 100 nm size. Zeta-potential of iron at the 100 mg/L of $Na_4P_2O_7$ was negative value, which was good for dispersion of metal particle. When $Na_4P_2O_7$ (100 mg/L), PVP($FeCl_3:PVP$ = 1 : 4, w/w) and Pd($FeCl_3:PdCl_2$ = 1 : 0.001, w/w) were used, iron nano particles which were round-shape, well-dispersed and near 100 nm-sized range. In this condition, $FeCl_3$ solution changed with spent Nd leachate solution, and then it is possible to be made round-formed iron nano particles at pH 9 and at the reaction bath over 20 L which is not include any surfactant.
Keywords
Iron nano particle; neodymium (Nd); $NaBH_4$; $Na_4P_2O_7$; Polyvinylpyrrolidone;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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