Preferences help
enabled [disable] Abstract
Number of results
2015 | 128 | 2B | B-62-B-66
Article title

The Heterogeneous Reverse Osmosis Membranes Based Separation of Fluorides with Fly Ash Pretreatment

Title variants
Languages of publication
The objective of this paper was to examine the separation efficiency of fluorides by heterogeneous reverse osmosis membranes made from cellulose acetate and modified coal with aryl diazonium salt (batch 318 K) and lignite based fly ash pretreatment. The effect of varying the feed concentration (400-100 mg/dm³) of sodium and ammonium fluorides on performances of these membranes using 400 mg/dm³ aqueous solution of sodium chloride as referent system at 1.76 MPa have been investigated. Practically no significant change in the membrane characteristics (product rate, and solute separation) by varying the above concentration of feed salt solutions. The high separation of fluoride (synthetic sample) ≈99% was obtained by resulting membranes pretreated with different amount and contact time of low cost adsorbent (fly ash) at pH 4. A sample of waste water effluents of cement industry was also treated with above membranes without pretreatment and the results are presented. These data indicate that the fluoride ion concentration are within acceptable level as far as environmental limits concerned, therefore, their practical application produced water of suitable quality, essentially free from fluorides.
  • Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, 10000 Prishtinë, Republic of Kosova
  • Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, 10000 Prishtinë, Republic of Kosova
  • [1] M. Yang, T. Hashimoto, N. Hoshi, H. Myoga, Water Res. 33, 3395 (1999), doi: 10.1016/S0043-1354(99)00052-4
  • [2] J.C. Huang, J.C. Liu, Water Res. 33, 3403 (1999), doi: 10.1016/S0043-1354(99)00065-2
  • [3] B. Grzmil, J. Wronkowski, Desalination 189, 261 (2006), doi: 10.1016/j.desal.2005.07.008
  • [4] P.M.H. Kau, D.W. Smith, P. Binning, Geoderma 84, 89 (1998), doi: 10.1016/S0016-7016(97)00122-5
  • [5] N. Hamdi, E. Srasra, Desalination 206, 238 (2007) , doi: 10.1016/j.desal.2006.04.054
  • [6] E. Diamadopoulos, S. Joannidis, G.P. Sakellaropoulos, Water Res. 27, 1773 (1993), doi: 10.10016/0043-1354(93)90116-y
  • [7] C.M. Castel, O. Simonnot, M. Sardin, Chem. Eng. Sci. 55, 3341 (2000), doi: 10.1016/S0009-2509(00)00009-9
  • [8] V.A. Joshi, M.V. Nanoti, Ann. Chim. 93, 753 (2003)
  • [9] C.Y. Hu, S.L. Lo, W.H. Kuan, Y.D. Lee, Water Res. 39, 895 (2005), doi: 10.1016/j.watres.2004.11.034
  • [10] C.Y. Hu, S.L. Lo, W.H. Kuan, Y.D. Lee, Separat. Purific. Technol. 60, 1 (2008), doi: 10.1016/j.seppur.2007.07.040
  • [11] Z. Amor, B. Bernard, N. Mameri, M. Taky, S. Nocolas, A. Elmidaoui, Desalination 133, 215 (2001), doi: 10.1016
  • [12] S.T. Gashi, N.M. Daci, F.I. Podvorica, T. Selimi, B.S. Thaçi, Desalination 240, 1 (2009), doi: 10.1016/j.desal.2007.12.045
  • [13] Y. Chen, M.-L. Chu, M.-Sh. Shieh, Sep. Sci. Technol. 27, 557 (1992), doi: 10.1080/01496399208018902
  • [14] P.I. Ndiaye, P. Moulin, L. Dominguez, J.C. Millet, F. Charbit, Desalination 173, 25 (2005), doi: 10.1016/j.desal.2004.07.042
  • [15] L. Feenstra, L. Vasak, J. Griffioen, 'Fluoride in groundwater, overwiew and evaluation of removal methods', Int. Groundwater Resources Assessment Center, Utrecht, Report no. SP 2007-1
  • [16] S. Sourirajan, T. Matsuura, Reverse Osmosis Ultrafiltration Process Principles, National Research Council Canada, Ottawa 1985, p. 79
  • [17] Reverse Osmosis and Nanofiltration, 2nd ed., AWWA manual, M46, Denver 2007, p. 10
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.