Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 29, No. 1 (January 2016) 60-67    Article in Press

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  HEXADECYL TRIMETHYL AMMONIUM BROMIDE-MODIFIED MONTMORILLONITE AS A LOW-COST SORBENT FOR THE REMOVAL OF METHYL RED FROM LIQUID-MEDIUM
 
Y. Omidi, B. Kamareei, H. Nourmoradi, H. Basiri and S. Heidari
 
( Received: December 18, 2015 – Accepted: January 20, 2016 )
 
 

Abstract    In this study, montmorillonite (MMT) modified by a cationic surfactant (Hexadecyltrimethyl ammonium bromide, HDTMA) was used as adsorbent to the removal of methyl red (MR) from aqueous solution. The effect of different parameters includes surfactant loading rate, contact time, pH, adsorbent dosage, and initial MR content was investigated on the sorption. The sorption capacity was increased by increasing the surfactants loading rate up to 120% cation exchange capacity (CEC) of the clay. The contact time 30 min and pH of 6 were selected as the optimum for the uptake of MR. The maximum uptake capacity was obtained 1428.5 mg/g. The experimental data of the sorption was well fitted by pseudo-second-order kinetic and Freundlich isotherm models. The results show that the HDTMA-modified MMT can be applied as an effective and low cost sorbent for the removal of MR dye from aqueous solution.

 

Keywords    Adsorption, Montmorillonite, Surfactant, Methyl Red

 

چکیده    در این مطالعه، مونت مورینولیت (MMT) اصلاح شده با یک سورفکتانت کاتیونی (هگزا دسیل تری متیل آمونیوم بروماید، HDTMA) برای حذف متیل رد از محلول آبی استفاده گردید. اثر پارامترهای مختلف مانند میزان بارگذاری سورفکتانت، زمان تماس، پی اچ، دوز جاذب وغلظت اولیه متیل رد روی ظرفیت جذب، بررسی گردید. ظرفیت جذب جاذب با افزایش میزان بارگذاری سورفکتانت تا 120% ظرفیت تبادل یونی مونت مورینولیت، افزایش داشته است. ظرفیت جذب بهینه جاذب (28/84 میلی گرم بر گرم) در زمان 30 دقیقه و پی اچ برابر 6 بدست آمد. داده های آزمایشگاهی به خوبی با مدل های کینتیک درجه دوم کاذب و ایزوترم فروندلیچ متناسب بودند. نتایج نشان داد که HDTMA-MMT میتواند به عنوان یک جاذب موثر و ارزان برای حذف متیل رد از محلول آبی بکار برده شود.

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