پديد آورنده :
عزيزي، سميه
عنوان :
كاربرد نانو جاذبهاي ارزان قيمت بنتونيت و بنتونيت فرآوري شده براي جذب فلزات سنگين از پساب هاي صنعتي و بهينه سازي شرايط جذب توسط طراحي فاكتوريال
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي تجزيه
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
هجده،108ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حسن قاضي عسگر
استاد مشاور :
مجيد افيوني، احمد ساعتچي
توصيفگر ها :
صنايع آبكاري , جذب سطحي , فرندليچ , لانگموئيد
تاريخ نمايه سازي :
10/2/90
استاد داور :
مهدي امير نصر، تقي خياميان
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Application of low cost nano adsorbents for heavy metal removal from industrial wastewaters and optimization by factorial design Somayeh Azizi azizi89s@yahoo com October 10 2010 Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Hassan S Ghaziaskar ghazi@cc iut ac ir Abstract The presence of heavy metals in industrial effluents has become a matter of environmental concern because of their reported toxic and carcinogenic impacts Many industrials such as mining tanning jewellery chemical metallurgical electrical galvanization and other electroplating processes discharge wastewaters containing heavy metals such as lead cadmium chromium nickel and zinc The conventional methods for wastewater purification include chemical precipitation ion exchange adsorption etc The bentonite and modified bentonite Metagel used as the adsorbent in the present study were bentonite obtained from Semnan region Iran In contact with water they swelles and forms a very stable colloidal suspension with nano size particle They were used as low cost nano adsorbents for the removal of Cr3 Ni2 Pb2 Cd2 and Zn2 from aqueous solutions This project was carried out in a batch system and the effect of various parameters such as contact time initial concentration of metal ions pH and adsorbent dosage by Response Surface Modeling were studied The Minitab software has been employed for modeling Metal ions concentration ranged 5 to 125 mg L 1 range of adsorbent dosage from 1 to 8 g L 1 and range of contact time was 10 to 210 min The adsorption rate and sorption capacity of metal ions could be significantly improved by increasing pH values but at higher pH precipitation was occurred along with adsorption The efficiency of removal of metal ions by Metagel was higher than bentonite because its sorption capacity was higher The metal ions concentration has been determined in wastewater samples collected from Zoob Ahan and Hessa Many factors such as the ionic radius of the hydrated ions the hydration energy of the metal ions and structure of clays influence the selectivity differences observed between the metal ions and another Different two parameter sorption isotherm models such as Langmuir and Freundlich were used to fit the equilibrium data Keywords Heavy metals Electroplating industries Nano adsorbent Adsorption Factorial design Freundlich Langmuir
استاد راهنما :
حسن قاضي عسگر
استاد مشاور :
مجيد افيوني، احمد ساعتچي
استاد داور :
مهدي امير نصر، تقي خياميان
