ارزیابی کارایی مواد فعال سطحی SDS و Tween 20 بر پالایش خاک رسی آلوده به گازوئیل با بهره‌گیری از فرآیند الکتروکینتیک و تعیین مقاومت فشاری خاک رس پس از حذف آلاینده

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده مهندسی عمران و منابع زمین، واحد تهران مرکزی، دانشگاه آزاد اسلامی، تهران

2 گروه مهندسی بازرسی فنی، دانشکده نفت آبادان، دانشگاه صنعت نفت، آبادان

چکیده

آلودگی خاک­ های حاوی هیدروکربن ­های نفتی یکی از مهم­ترین چالش­ های زیست­ محیطی می ­باشد، ازاین­رو لازم است تا در مورد پاکسازی مواد هیدروکربنی از جمله گازوئیل در مناطق نفت خیز تدابیری صورت بگیرد، جهت پاکسازی این ترکیبات از خاک راه کارهای مختلف از جمله استفاده از فرآیند الکتروکینتیک به ­کار می­ رود. این روش برای پاکسازی خاک ­های ریزدانه خصوصاً رسی مؤثر می ­باشد، در این تحقیق، پاکسازی خاک رسی آلوده به گازوئیل به ­روش الکتروکینتیک در حضور مواد فعال سطحی (Surfactant) SDS (Sodium Dodecyl Sulfate) و Tween 20 مورد ارزیابی قرار می ­گیرد و اثر کنترل pH در کاتولیت و آنولیت بر فرآیند اصلاح الکتروکینتیکی (Electrokinetic) خاک رسی مورد ارزیابی قرار گرفته است. نتایج فرآیند نشان می­ دهد که در غیاب ماده فعال سطحی روش الکتروکینتیک راندمان بسیار کم در پاکسازی گازوئیل از خاک رس دارد آن­گاه در حضور ماده فعال سطحی بازدهی حذف افزایش چشمگیری دارد، با کنترل pH در کاتولیت و آنولیت و افزایش غلظت ماده فعال سطحی بازدهی حذف گازوئیل از خاک افزایش می ­یابد. با کاربرد Tween 20 کمترین میزان پاکسازی در غلظت 05/0% برابر با 18% به ­دست آمده است این در حالی است که SDS توانست حدوداً 49% از گازوئیل را در غلظت 15/0% ماده فعال سطحی حذف کند، در ادامه تحقیق آزمایش تک­ محوری جهت تعیین مقاومت فشاری محصورنشده نمونه خاک انجام گرفته است که نشان می­ دهد فرآیند پاکسازی سبب افزایش مقاومت فشاری خاک می­ گردد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Efficiency of SDS and Tween 20 Surfactants on Refining of Diesel Contaminated Clay Using Electrokinetic Process and Determination of Compressive Strength of Clay after Removal of Contaminant

نویسندگان [English]

  • Ali Taherian 1
  • Maryam Yazdi 1
  • Iman Danaei 2
  • Amir Ali Zad 1
1 Department of Civil Engineering, Faculty of Civil and Earth Resources Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
2 Department of Technical Inspection Engineering, Abadan Faculty of Petroleum, University of Petroleum Industry, Abadan, Iran
چکیده [English]

In the present era, environmental pollution is a global crisis, increasing population growth and urban development, industrial expansion and unlimited use of natural resources, are among the increasingly important factors of pollutants (Reilley, 1996). Vocciante (2021) found in the study of stability in electrokinetic modification processes that the electrokinetic method is suitable for cleaning inorganic pollutants from clay. Zhou (2021) found that using the electrokinetic method is effective in removing heavy metals zinc, cadmium, and manganese from the soil and leads to the removal of about 72% of the pollutant from the soil sample. Vaishnavi (2021) in the study of bio-electrokinetic modification of diesel-contaminated environment with biosurfactant found that this method is an effective method for cleaning and cleaning soils contaminated with diesel hydrocarbons. Hanaei et al. (2021) found that the direct shear test showed that the adhesion of the soil sample increased and the friction angle decreased after oil contamination, and the permeability test showed that the contamination of the soil sample decreased the permeability of sandy soil and this change It is a function of the amount of oil and the viscosity of oils.

کلیدواژه‌ها [English]

  • Electrokinetics؛ Clay
  • diesel
  • pH control
  • Surfactant
  • Compressive strength
  • Electroosmosis
  • Geotechnical
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