پديد آورنده :
قائد اميني، حميدرضا
عنوان :
مطالعه و تحقيق در ساختار نانو ذرات كلسيم كربنات توليدي در محيط افروني و بررسي قابليت آن براي حذف كادميوم از آب
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
يازده، [74]ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
محمد چالكش اميري
توصيفگر ها :
افزون هاي كلوئيدي گازي , فلز سنگين , طراحي آزمايشات به روش سطح پاسخ
استاد داور :
محمد قريشي، نسرين اعتصامي
تاريخ ورود اطلاعات :
1395/12/02
رشته تحصيلي :
مهندسي شيمي
چكيده انگليسي :
73 Investigation on the Structure of Generated CaCO3 Nanoparticles by Aphron Template and Its Application for Cadmium Removal from Water Hamidreza Ghaedamini H ghaedamini@ce iut ac ir Date of submission Junuary 1 2017 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Mohammad C Amiri amir33@cc iut ac irAbstractEliminating environmental problems such as high concentration of heavy metal pollutants in wastewaters isconsidered today as one of the main concerns should be cared Heavy metal contaminations can be successfullyremoved by using the absorption process In this project calcium carbonate as an adsorbent were produced inthe colloidal gas aphron CGA system There are different morphologies and polymorphs of calcium carbonate The effects of surfactant concentration and temperature on the morphology and crystalline structure of calciumcarbonate particles were investigated in the first step of this study Experimental results show that increase inthe surfactant concentration leads to a shift in the morphology of calcite cubic particles with 2 5 m size tospherical particles with 200nm diameters The experimental data also show that increasing the concentration ofthe surfactant from 100mg L to 600mg L in the CGA system results in the phase shift from calcite to vateriteparticles Moreover analyzing the effect of temperature showed that increasing the temperature from 25 C to75 C results in production of rod like particles of aragonite when surfactant concentrations were 100mg L and200mg L while this change was not observed in 400mg L and 600mg L of this surfactant However increase inthe temperature reduced the particle size The synthesized rod like aragonite particles were used as theabsorbent of cadmium ions from the aqueous environment in the second step of this study The surface responsemethodology was used to investigate the effects of various important factors including temperature from 25 Cto 65 C absorbent concentration from 0 5g L to 1 5g L and the concentration of metal ions from 50mg L to200mg L on the absorption process Analysis of Langmuir isotherms showed that the produced particles havegood capability in removal of cadmium ion with adsorption capacity of 167mg cadmium g of adsorbent Theresults showed that the equilibrium condition is established after two hours A pseudo second order model wellfitted the experimental data R2 0 99 The optimized amounts of temperature metal ion concentration andabsorbent were predicted by RSM were 61 52 C 195 09mg L and 0 53g L respectively The optimizedabsorption rate by the software was 92 42mg g rather than empirical rate 89 35mg g adsorbent Key words Calcium carbonate structures Colloidal gas aphron Heavy metal removal Cadmium ion Surface response methodology RSM
استاد راهنما :
محمد چالكش اميري
استاد داور :
محمد قريشي، نسرين اعتصامي
