%0 Journal Article %T Synthesis of Montmorillonite Modified with Hexadecyltrimethylammonium Bromide (HDTMA-Br) as an Efficient Adsorbent for Treatment of Oilfield Produced Water %J Nashrieh Shimi va Mohandesi Shimi Iran %I Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR %Z 1022-7768 %A Pendashteh, Alireza %A Azimi, Seyyedeh Cobra %D 2023 %\ 02/20/2023 %V 41 %N 4 %P 205-223 %! Synthesis of Montmorillonite Modified with Hexadecyltrimethylammonium Bromide (HDTMA-Br) as an Efficient Adsorbent for Treatment of Oilfield Produced Water %K Sodium montmorillonite %K Hexadecyltrimethylammonium bromide %K Produced water %K Adsorption %K Turbidity %K kinetic model %R %X In this study, montmorillonite modified by the hexadecyltrimethylammonium bromide (HDTMA-Br) was prepared by the reaction of the sodium montmorillonite with HDTMA-Br surfactant. The adsorbent structure was characterized using Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), power-spectral-density (PSD), Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. Then, the efficiency of synthetized adsorbent was investigated for the removal of the chemical oxygen demand reduction (COD), biological oxygen demand (BOD), suspended solids (TSS), oil and grease and turbidity of the oilfield produced water. The exchange capasity was obtained 200 % for modified montmorillonite. The maximom of COD reduction was resulted 92.04 % at optimal conditions with the adsorbent dosage 0.3 g, pH = 7, and contact time 45 min. The advantages of this method are cheapness, safety, and reusability of the adsorbent, short time treatment, high adsorption capacity, easy separation of the adsorbent from the reaction medium. %U https://www.nsmsi.ir/article_246764_7af586590738f56f1a3232dcf1d38496.pdf