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Removal of TDS from Cooling Tower Water by Using EDTA-Modified Bagasse Fibers |
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| Authors: | Jamil Rima Maurice Abourida Melek Yalcintas Abidin Kaya |
| Affiliation: | 1Professor, Physical Chemistry Laboratory of Environmental Engineering and Biology, Faculty of Sciences II, Lebanese Univ., P.O. Box 26110217, Fanar, Lebanon (corresponding author). E-mail: jrima@ul.edu.lb 2Professor, Physical Chemistry Laboratory of Environmental Engineering and Biology, Faculty of Sciences II, Lebanese Univ., P.O. Box 26110217, Fanar, Lebanon. E-mail: mabourida@ul.edu.lb 3Mechanical Engineer, Amel Technologies, Inc., 1164 Bishop St., Ste. 124-302, Honolulu, HI 96813. E-mail: melek@ameltech.com 4Civil Engineer, Amel Technologies, Inc., 1164 Bishop St., Ste. 124-302, Honolulu, HI 96813. E-mail: abidinkaya@yahoo.com |
| Abstract: | Modified by ethylenediaminetetraacetic acid (EDTA) salts and unmodified bagasse fibers were tested for the removal of total dissolved solids (TDSs) from cooling tower water. Parameters such as hydrogen ion concentration (pH), particle size of bagasse fibers, and the concentrations of adsorbent and adsorbate were studied to optimize the conditions to be applied on a commercial scale for the decontamination of effluents of cooling tower water. The optimum pH for TDS removal was between 6 and 6.5. The efficiency of TDS removal increased when the size of fiber particles decreased (100?μm) and when the concentration of EDTA salt increased to reach 78 mg/g of modified bagasse fibers. The adsorption parameters were determined using both Langmuir and Freundlich isotherms. The preferential mechanisms for the retention of TDSs are a complexation process between the TDSs and chemical functions present on the surface of fibers, and the chelation process with the EDTA attached to the fibers. The results obtained could be valuable for application to cooling tower water treatment and for the softening of hard drinking water. |
| Keywords: | Salt Fibers Cooling towers Cooling water Water treatment |