كاربرد غشاهاي نانو ليفي جهت تصفيه پساب هاي حاوي فلزات سنگين

چكيده انگليسي :

Application of Nanofibrous Membrane to Recycle Heavy Metal Ion from Waste Water Somaye Kalantari s kalantaridehaghi@tx iut ac ir December Department of Textile Engineering Isfahan University of Technology Isfahan Iran Degree M Sc Language Farsi Dr S Abdolkarim Hosseini hosseinir@cc iut ac ir Dr H Izadan izadan@cc iut ac ir Abstract The presence of heavy metal in the wastewater has been of great concern to scientists and engineers because of their increased discharge toxic nature and other adverse effects on receiving waters Removal of toxic heavy metal ions from wastewater has received signifcant attention due to their high impact on environment and public health Leaking of these toxic heavy metals to the soil contaminates groundwater and surface water leading to serious impacts on the health of human and animals Many methods that are being used to remove heavy metal ions include chemical preciptation ion exchange adsorption membrane fltration electro chemical treatment technologies etc Membrane fltration technologies with different types of membranes show great promise for heavy metal removal for their high effciency easy operation and space saving In this study an electrospun sulfonated poly ethylene terephthalate SPET nanofibrous mat was applied as a membrane for metal ion filtration Nanofiber membranes prepared with different conditions and then simulated wastewater containing metal ion as an aqueous solution an experimental design based on an orthogonal array OA L proposed by Taguchi was used In any case the transmitted flux flow per unit area of the membrane was measured and compared the efficiency of the filtering process Firstly Membrane with a thickness of micrometers the average diameter of the nanofibers was in the range of nm were made from the polyester polymer Three metal copper zinc and lead which are harmful heavy metals found in the waste water from dyeing to be selected The effect of parameters such as initial concentration amount of adsorbent pressure pH soluble on absorption have been studied The results showed that the metal ion rejection increased with increasing adsorbent concentration and the pH of solution decreased by increasing applied pressure and concentration of solution pH change in the efficiency of metal removal is the most effective and then adsorbent concentration initial concentration of effluent and pressure respectively second third and fourth have influence Spectra ATR FTIR of the samples before and after filtering membrane translocation showed absorption bands indicating the Absorbed mainly through the reaction between the metal ion and the polyester sulfonated group has been created Efficiency of Cu Pb and Zn respectively and of the polymer solution of w v of sulfonated PDF created with pdfFactory trial version www pdffactory com

كلانتري، سميه

كاربرد غشاهاي نانو ليفي جهت تصفيه پساب هاي حاوي فلزات سنگين

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