تأثیر فعال‌سازی بازی-اسیدی خاک ورمیکولیت قبل از اصلاح سطح آن با CTAB بر ظرفیت جذب روغن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 آزمایشگاه تحقیقاتی نانومواد و تکنولوژی سطح، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه علم و صنعت ایران

2 گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه شهید مدنی آذربایجان

چکیده

در این پژوهش، تأثیر فعال‌سازی بازی و بازی-اسیدی بر ظرفیت جذب ورمیکولیت اصلاح‌شده با سورفکتانت ستیل تری متیل آمونیوم برومید (CTAB) مورد بررسی قرار گرفت و نمونه خاک‌های اصلاح‌شده برای جذب روغن خوراکی، نرمال هگزان و دی‌کلرومتان مورد استفاده قرار گرفتند. به‌منظور بررسی اثر فعال‌سازی بر ویژگی‌های ریخت‌شناسی، سطح ویژه، ساختار فازی، ترکیب شیمی سطح و همچنین رفتار ترشوندگی نمونه‌های ساخته‌شده از آنالیز طیف‌سنجی مادون قرمز (FTIR)، آنالیز میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM)، آنالیز اندازه‌گیری سطح ویژه (BET)، آنالیز زتا پتانسیل و آنالیز زاویه تماس استاتیک استفاده گردید. نتایج نشان داد نمونه ساخته‌شده با فعال‌سازی بازی-اسیدی خاک ورمیکولیت توسط پتاسیم هیدروکسید (M 5/1) و سولفوریک اسید (M 5/0) و اصلاح‌شده با CTABا (mM 5/0) بیشترین سطح ویژه و خواص آب‌گریز با زاویه تماس استاتیک قطره آب ˚6/145 از افزایش 6/108% ظرفیت جذب روغن خوراکی، 5/52% ظرفیت جذب روغن نرمال هگزان و 8/104% ظرفیت جذب روغن دی‌کلرومتان نسبت به نمونه خام برخوردار است. با توجه به استفاده از روش ساده، سهل الوصول بدون بهره‌گیری از اصلاح‌کننده‌های سطحی در ساخت این نمونه و همچنین استفاده از خاک رس ارزان قیمت و سبک به‌عنوان جاذب، می‌توان از نتایج به‌دست آمده به‌منظور استفاده از خاک ورمیکولیت اصلاح‌شده با CTAB در پاک‌سازی نشت نفت خام بهره گرفت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Alkaline-acidic Activation of Vermiculite Before its Surface Modification with CTAB on Oil Sorption Capacity

نویسندگان [English]

  • Faeze Hajizadeh 1
  • Reza Norouzbeigi 1
  • Elmira Velayi 2
1 Nanomaterials and Surface Technology Research Laboratory, School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
2 Department of Chemical Engineering, Faculty of Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
چکیده [English]

adsorption was investigated in this study. Edible oil, n-hexane, and dichloromethane were chosen as oil contaminants. Moreover, FTIR analysis, field emission scanning electron microscope analysis, specific surface measurement (BET), zeta potential, and static contact angle analyses were used to investigate the effect of activation and CTAB modification on the morphological characteristics, phase structure, surface chemical composition, and wetting behavior of the prepared samples. The results showed that the sample prepared by alkaline-acid activation of vermiculite with potassium hydroxide (1.5 M) and sulfuric acid (0.5 M) and modified with CTAB (0.5 mM) exhibited the highest specific surface area and hydrophobic properties with a 145.6° water contact angle. In addition, the adsorption capacity of edible oils, normal hexane, and dichloromethane increased by 108.6%, 52.5%, and 104.8 % respectively, compared to the raw sample.

کلیدواژه‌ها [English]

  • Vermiculite
  • Alkaline-acid Activation
  • CTAB Surfactant
  • Oil Adsorption Capacity
  • Wetting Behavior
  • Surface Modification
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