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Article
Preparation of Nano Activated γ-Alumina ( ) with Surfactant and Surface Characterization

Authors: Enas Sameer AL-Khawaja --- Alaa Hussein Al-Fatlawi
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2016 Volume: 24 Issue: 3 Pages: 658-665
Publisher: Babylon University جامعة بابل

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Abstract

This paper deals with the preparation of Alumina by sol-gel technique through the hydrolysis of aluminum ion mixed with the glucose as a surfactant and converting it to gel by ammonium hydroxide in aqueous media. The resulting sol composed of particle is draying to become a transparent gel. The freshly prepared gel is heated at 700°C for 2hrs to obtain alumina ( )particles. The obtained particles are found to be γ-alumina particles with high porosity, Their characteristics are determined by LPSA, XRD, SEM, TEM and BET techniques. The results show that the particles are pure alumina, nano-sized=20nm, spherical shape, high surface area=210 /gm.

البحث هو لطريقه تحضير ماده الالومينا بطريقه المحلول-الجل بواسطة اذابه عنصر الالمنيوم وخلطه مع كلوكوز كعامل مساعد وتحويله الى جل باستخدام هيدروكسيد الامونيوم. الجل الناتج عباره عن ثلاثي هيدروكسيد الالمنيوم يتم تجفيفه ليتحول الى جل صلب. يتم تسخين الجل تحت درجه حرارة 700 درجه مئويه لمده ساعتين للحصول على ثلاثي اوكسيد الالمنيوم (الالومنيا). الماده الناتجة ماده غير متبلورة نوعها كاما-الومينا ذات مسامية عالية. حددت خصائصها باستخدام عده تقنيات للفحص منها LPSA, XRD, SEM, TEM and BET. نتائج الفحوصات بينت ان حبيبات الماده كرويه الشكل وجدا نقيه وذات حجم =20 نانومتر مع مساحه سطحيه كبيره تساوي =210 م²/غم.


Article
Removal Lead and Cadmium Ions in Industrial Wastewater Using Graphene Nano Sheets

Authors: Faris Haamoodi AL Ani --- Alaa Hussein AL Fatlawi --- Gassaq Ahmed Taher
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 9 Part (A) Engineering Pages: 1903-1914
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Industrial wastewater effluents especially that contain heavy metals considered a foremost problem of water pollution in the worldwide environment. Discharging this wastewater,that contains considerable heavy metals' concentrations into ground, water or streams and rivers causes deterioration of the ecological system.The present study aimed to synthesized the graphene nano sheets by electrochemical methodand used for removal of lead Pb+2 and Cadmium Cd+2 ions that found in industrial wastewater. Graphene nano sheets synthetic in this study is characterized by X-ray diffraction XRD, scanning electron microscopy SEM,Raman spectroscopy and Fourier-Transformed Infrared Spectra (FT-IR).The abundant oxygen-containing functional groups on the surfaces of graphene nanosheets and strong surface complexion played an important role in (lead and cadmium ions) adsorption. Adsorption properties for (lead and cadmium ions) on graphene nanosheets were regularly investigated, including contact time, pH effect, adsorbent doses and initial concentrations for lead and cadmium solutions. The experimental data were evaluated by Langmuir, Freundlich models in order to describe the equilibrium isotherms. From the adsorption isotherms, the maximum adsorption capacities of lead ions on graphene calculated from Langmuir model were equivalent 476.19 (mg/g) at pH 6.2 and equilibrium contact time 35 min with adsorbent dose (40mg/L), and 188.679 (mg/g) at pH 5.2 and equilibrium contact time 40 min with adsorbent dose (20mg/L) for cadmium ions. The results of the present study demonstrated that graphene has respectable qualifications to removal (Pb+2&Cd+2 ions) which found in industrial wastewater as compared to other adsorbents e.g. activated carbon.

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