زمین شناسی مهندسی

زمین شناسی مهندسی

پاک‌سازی خاک رسی چسبندۀ آلوده به گازوئیل با استفاده از روش‌های حرارتی و سورفکتنت

نویسندگان
دانشگاه تهران، پردیس کشاورزی و منابع طبیعی، گروه آبیاری و آبادانی
چکیده
در این پژوهش اثر گازوئیل بر خواص فیزیکی و مکانیکی خاک رسی چسبنده بررسی شد. سپس تأثیر روش حرارتی و استفاده از دو نوع سورفکتنت بر مشخصات فیزیکی و مکانیکی خاک آلوده بررسی شد. خاک رسی چسبنده به‌صورت مصنوعی با درصدهای گوناگون گازوئیل ( 10% و 5%) آلوده شد. به‌منظور پاک‌سازی خاک به‌وسیلۀ اعمال حرارت نمونه‌های خاک آلوده شده در معرض حرارت‌های 50، 100 و 150 درجۀ سانتی‌گراد قرار گرفت. علاوه بر آن پاک‌سازی با شویندههای سدیم دودسیل سولفات و تویین 80 نیز انجام شد. آزمایش‌های فیزیکی و مکانیکی شامل دانه‌بندی، حدود اتربرگ، تراکم و مقاومت تک‌محوری روی نمونه‌هایی از خاک طبیعی آلوده شده و خاک پاک‌سازی شده از دو روش گفته شده انجام شد. نتایج نشان داد افزودن گازوئیل موجب تغییراتی در مشخصات فیزیکی و مکانیکی خاک می‌شود و این تغییرات تابعی از درصد گازوئیل است. علاوه بر آن نتایج پژوهش‌ها نشان داد روش حرارتی و استفاده از شوینده در پاک‌سازی خاک مؤثر است.
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