Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/66592
Title: Extraction of 2-hydroxyphenol by surfactant coated nanosized magnetic particles
Authors: Peng, Z.-G.
Hidajat, K. 
Uddin, M.S. 
Keywords: 2-Hydroxyphenol
2-Nitrophenol
Adsorption equilibrium
Adsorption kinetics
Bi-layer surfactant coating
Nano-sized magnetic particles
Issue Date: Sep-2003
Source: Peng, Z.-G.,Hidajat, K.,Uddin, M.S. (2003-09). Extraction of 2-hydroxyphenol by surfactant coated nanosized magnetic particles. Korean Journal of Chemical Engineering 20 (5) : 896-901. ScholarBank@NUS Repository.
Abstract: A colloidal suspension of magnetic particles coated with double layer surfactant molecules was prepared, characterized and used for separation of some chemicals. The aqueous magnetic fluid was prepared by chemical precipitation method and characterized by total organic carbon analyzer (TOC), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The TOC and TGA measurements indicate that the prepared magnetic particles are coated with surfactant molecules in double layers. The outer surfactant layer has free polar heads. TEM measurement results show that magnetic particles are nanosized. A mixture of 2-hydroxyphenol (strong polar) and 2-nitrophenol (weak polar) was chosen as the target system. Results show that the magnetic fluid can selectively adsorb 2-hydroxyphenol from the mixture, whereas the adsorption of 2-nitrophenol is insignificant. For 2-hydroxyphenol, the adsorption equilibrium can be described well by Langmuir isotherm, and the adsorption kinetic can be fitted well by a linear driving force mass transfer model.
Source Title: Korean Journal of Chemical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/66592
ISSN: 02561115
Appears in Collections:Staff Publications

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