پديد آورنده :
گوگردچيان، فهيمه
عنوان :
تهيه نانو كريستال هيدروكسي آپاتيت از استخوان ، شكل دهي و كاربرد آن در جدا سازي سرب از آب
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
شانزده،120ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
احمد محب، رحمت الله عمادي
توصيفگر ها :
جذب سطحي , تاگوچي , آلژينات , فلزات سنگين
تاريخ نمايه سازي :
24/7/89
استاد داور :
حميد زيلويي، احمد منشي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Production of Nanocrystalline Hydroxyapatite from Bone Forming and Its Application in Lead Removal from Water Fahimeh Googerdchian f googerdchian@ce iut ac ir Date of Submission 2010 05 16 Chemical Engineering Department Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Ahmad Moheb Ahmad@cc iut ac ir Rahmatolah Emadi remadi@cc iut ac ir Abstract Removal of heavy metals from contaminated waters and waste waters has been always one of the important environmental issues There are different methods for removing heavy metals from contaminated waters Among these adsorption with a low cost adsorbent has been found to be an economical and reliable method which can easily remove many pollutants from water by employing proper adsorbents In this research nano size and nanocrystalline hydroxyapatite powders with average crystal size of 18 60 nm were produced from bovine bone by thermal treatment and mechanical milling with a high energy planetary ball mill The produced powders were used as adsorbent to remove lead ions from aqueous solutions At this stage of the work the effects of heating time and temperature on the properties of produced powders were investigated On the basis of obtained results heating temperature and time of 750 oC and 4 hr respectively were found the optimum conditions for hydroxyapatite production with proper crystallite size from bovine bone Adsorption experiments were designed using Taguchi method and effect of such operating parameters as initial lead concentration in the solution initial pH of the solution adsorbent mass and ball mill time on the percentage of lead removal were investigated To reduce the potential costs of separating nano size adsorbent powder from treated water the hydroxyapatite powder was shaped with alginate as a natural polymer For this part of the work optimum milling time of 2 hr was also determined by Taguchi method After choosing optimum powder alginate hydroxyapatite composite adsorbents with 20 and 50 wt of hydroxyapatite were produced in the forms of beads and film Adsorption capacity of the composite beads was less than that of alginate and hydroxyapatite adsorbents alone while film composite adsorption was more than those of two other adsorbents alone By using film composite adsorbent which contained 50wt of hydroxyapatite lead removal increased about 13 56 and 22 29 in comparison with alginate and hydroxyapatite adsorbents respectively Effect of ultrasound irradiation on the adsorption capability of the powders which were milled from 2 to 16 hr was also investigated It was observed that by using ultrasound irradiation adsorption ability of powders increased significantly from 53 8 up to 122 1 for the powders with different milling times Keywords Nanocrystalline hydroxyapatite Adsorption Taguchi Alginate Heavy metal
استاد راهنما :
احمد محب، رحمت الله عمادي
استاد داور :
حميد زيلويي، احمد منشي
