مقاله Thermodynamic investigation of the removal of Azure A dye from aqueous solution تحت فایل ورد (word) دارای 5 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Thermodynamic investigation of the removal of Azure A dye from aqueous solution تحت فایل ورد (word) کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

این پروژه توسط مرکز مرکز پروژه های دانشجویی آماده و تنظیم شده است

توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Thermodynamic investigation of the removal of Azure A dye from aqueous solution تحت فایل ورد (word) ،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از متن مقاله Thermodynamic investigation of the removal of Azure A dye from aqueous solution تحت فایل ورد (word) :

سال انتشار: 1390

محل انتشار: سومین کنفرانس تخصصی ترمودینامیک

تعداد صفحات: 5

چکیده:

In this study, rice husk was used as sorbent to remove Azure A from aqueous solution by batch sorption technique. It was seen that the removal of thionine increased with increasing initial dye concentration (from 5 to 25 mg/l), solution pH (from 2 to 7), solution temperature (from 10 to 55 °C) and sorbent dose (from 0.1 to 0.50 g/50 ml). The maximum dye removal was reached at 60 min. Sorption isotherms were analyzed by Langmuir, Freundlich and Temkin models at different temperatures of 10, 15, 20, 25, 35, 45 and 50 °C. Moreover, the thermodynamics of sorption were also studied. It was found that the values of standard free energy (DGo ) were negative for rice husk. The values of standard enthalpy (DHo ) and entropy (DSo ) were found to be positive, and the obtained results were interpreted in detail. Thermodynamic studies suggested the spontaneous and endothermic nature of adsorption of Azure A by treated rice husk.