화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.32, No.7, 1323-1326, July, 2015
DOI10.1007/s11814-014-0342-6  Export Citation
Phosphate removal from aqueous solutions on fly ash with medium calcium content
Yunbo Wang, and Deshuai Sun1, †
  • International College, Qingdao University, Qingdao 266071, China
  • 1College of Chemistry & Chemical Engineering, Qingdao University, Qingdao 266071, China
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Excessive discharge of phosphate into water bodies may cause eutrophication and affect the natural water quality. The adsorption behavior of phosphate from aqueous solution on fly ash was investigated by a medium calcium fly ash in weak acid solution. Experimental findings showed that removal of phosphate was pH-dependent with the maximum adsorption capacity at the initial solution pH of 5.0-7.0. The increment in the initial phosphate concentration and temperature enhanced the adsorption capacity. Kinetic studies of phosphate followed the pseudo-second-order model. The predominant removal mechanism was ligand exchange reaction on the basis of desorption experiment. The adsorbed phosphate was difficult to leach to the environment from the waste fly ash.
Keywords:Fly Ash;Medium Calcium Content;Kinetics;Phosphate Removal Mechanism;Desorption
  1. Chitrakar R, Tezuka S, Sonoda A, Sakane K, Ooi K, Hirotsu T, J. Colloid Interface Sci., 298(2), 602 (2006)
  2. Chen JG, Kong HN, Wu DY, Chen XC, Zhang DL, Sun ZH, J. Hazard. Mater., 139(2), 293 (2007)
  3. Johansson L, Gustafsson JP, Water Res., 34, 259 (2000)
  4. Li YZ, Liu CJ, Luan ZK, Peng XJ, Zhu CL, Chen ZY, Zhang ZG, Fan JH, Jia ZP, J. Hazard. Mater., 137(1), 374 (2006)
  5. Kim KS, Park JO, Nam SC, Environ. Eng. Res., 18, 267 (2013)
  6. Lu SG, Bai SQ, Zhu L, Shan HD, J. Hazard. Mater., 161(1), 95 (2009)
  7. Xu K, Deng T, Liu JT, Peng WG, Fuel, 89(12), 3668 (2010)
  8. Xu XT, Li Q, Cui H, Pang JF, Sun L, An H, Zhai JP, Desalination, 272(1-3), 233 (2011)
  9. Hsu TC, Fuel, 87(13-14), 3040 (2008)
  10. Sun DH, Zhang XD, Wu YD, Liu X, J. Hazard. Mater., 181(1-3), 335 (2010)
  11. Sun D, Zhang X, Wu Y, Liu T, Int. J. Environ. Sci. Technol., 10, 799 (2013)
  12. Oguz E, Colloids Surf. A: Physicochem. Eng. Asp., 262, 113 (2005)
  13. He Z, Honeycutt CW, A modified molybdenum blue method for orthophosphate determination suitable for investigating enzymatic hydrolysis of organic phosphates, Publications from USDA-ARS/UNL Faculty (2005).
  14. Mane VS, Mall ID, Srivastava VC, J. Environ. Manage., 84, 390 (2007)
  15. Saha B, Chakraborty S, Das G, J. Colloid Interface Sci., 331(1), 21 (2009)
  16. Acemioglu B, J. Colloid Interface Sci., 274(2), 371 (2004)