Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 28, No. 4 (April 2015) 507-515   

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  BATCH ADSORPTION OF ORGANIC DYES BY ORGANO-BAGASSE: CARBON CONTENT, PH INFLUENCE, KINETICS AND ISOTHERMS (RESEARCH NOTE)
 
C. Umpuch
 
( Received: October 08, 2014 – Accepted: March 13, 2015 )
 
 

Abstract    The influence of carbon content in three organic dyes, blue21, yellow20, and green40 on the adsorption behavior using organo-bagasse as a biosorbent was investigated. The organo-bagasse was prepared by adsolubilisation using tetradecyltrimethyl ammonium bromide as a chemical modifying agent. The precursor and organo-bagasse were characterized by elemental analysis, Brunauer-Emmett-Teller method, Fourier transform infrared spectroscopy spectra, and scanning electron microscopy images. A number of batch tests were carried out as functions of contact time, initial pH solution, and initial dye concentration. The results showed that the adsorption capacity of green40 was the highest, followed by yellow20 and then blue21. Adsorption of the organic dyes increased as the carbon content in the organic dyes increased. The adsorption of the three dyes reached equilibrium within 3.0 h and at this condition the adsorption capacities of blue21, yellow20, and green40 were 130.50, 166.55 and 174.81 mg/g respectively. The maximum adsorption was obtained at pH 2.0. The kinetic data followed the pseudo-second order model indicating rate of interacting formation on the biosorbent surface was the rate of limiting step. The results showed that the carbon content in the organic dyes had a significant effect on the adsorption behavior of organic dyes by the organo-bagasse.

 

Keywords    Organo-bagasse, Adsolubilisation, Carbon Content, Characterization, Adsorption

 

چکیده    فاکتور‌های موثره از قبیل محتوی کربن، زمان، pH محیط و غلظت رنگ اولیه در پاسخ به جذب سطحی سه رنگ ارگانیک آبی-۲۱، زرد-۲۰ و سبز-۴۰ با استفاده از organo-bagasse به عنوانه جاذب مورد بررسی قرار گرفت. organo-bagasse توسط روش حلال سازی با استفاده از تترا دسیل متیل آمونیوم بروماید تهیه گردید. مواد موجود توسط روش‌های برونر‌امات‌تلر، طیف سنجی مادون قرمز و میکروسکوپ الکترونی نگاره مورد آنالیز قرار گرفت. آنالیز‌های گروهی و تکمیلی روی محتوی کربن، ph اولیه محیط و محتوی اولیه رنگ (dye) مورد بررسی قرار گرفت.نتایج بدست آماده گویای این است که میزان جذب سطحی در سبز-۴۰ بالاترین بوده؛ زرد-۲۰ و آبی-۲۱ به ترتیب رتبه‌های دوم و سوم را دارا می‌‌باشند. نتیجه آنالیزی نشان میدهد که میزان جذب سطحی رنگ‌های ارگانیک با افزایش میزان محتوی کربن افزایش می‌‌یابد (همبستگی‌ مثبت). میزان جذب سطحی هر سه رنگ (آبی-۲۱ (۱۳۰.۵۰ میلی‌ گرم/گرم)، زرد-۲۰ (۱۶۶.۵۵ میلی‌ گرم/گرم)، سبز-۴۰ (۱۷۴.۸۱میلی‌ گرم/گرم)) بعد از سه ساعت به میزان تعادل رسید .بیشترین میزان جذب سطحی در pH =۲ بدست آمد. آنالیز کنتیک آنزیمی نشان داد که عامل بازدارنده و محدودکننده میزان برهم کنش شکل گرفته در سطح محلول می‌باشد.باتوجه به مطالب مطرح شده، organo-bagasse یک جاذب مؤثر برای جذب سطحی رنگ‌های عالی ‌می‌باشد.

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