Water Science & Technology Vol 55 No 1-2 pp 169–176 © IWA Publishing 2007 doi:10.2166/wst.2007.052
Phosphorus recovery by mesoporous structure material from wastewater
S.H. Lee*, B.C. Lee*, K.W. Lee*, S.H. Lee*, Y.S. Choi*, K.Y. Park** and M. Iwamoto***
*Water Environment & Remediation Center, Korea Institute of Science & Technology, POBox 131, Cheongryang, Seoul, 130-650, Korea (E-mail: yisanghyup@kist.re.kr)
**Department of Civil and Environmental System Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 143-701, Korea
***Chemical Resources Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori-ku, yokohama, 226-8503, Japan
ABSTRACT
This study was designed to investigate the fundamental aspects of a possible removal of phosphorous from wastewater by using the mesoporous structure materials for wastewater reuse. The zirconium sulphate with mesoporous structure as a new type of ion exchangers was synthesised by hydrothermal reaction. From the results of X-ray diffraction and transmission electron microscope, it was discovered that the synthesised material had hexagonal mesoporous structure with a pore size of approximately 40–50Å. Experimental results showed that the zirconium sulphate with mesoporous structure had very high sorption capacity for the phosphorus. The novel ion exchange occurred between PO43- and SO42-, OH-. The amount of phosphate ions exchanged into the solid was as great as 3.4 mmol/g-ZS. Furthermore, it is possible to obtain a higher removal efficiency than other ion exchange media and adsorbents.
Keywords: Adsorption; ion exchange; mesoporous structure material; phosphorus; zirconium sulphate
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