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ارزیابی بهسازی زیستی خاکهای آلوده به روغن موتور | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 4، دوره 52.1، شماره 106، خرداد 1401، صفحه 41-53 اصل مقاله (1.51 M) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jcee.2020.9812 | ||
نویسندگان | ||
محمدتقی بلوری بزاز؛ جعفر بلوری بزاز* | ||
دانشکده مهندسی، دانشگاه فردوسی مشهد | ||
چکیده | ||
مشکلات محیط زیستی ناشی از انتشار آلایندهها در خاک، علاوه بر پیامدهای زیست محیطی، تغییرات فراوانی در خواص فیزیکی، شیمیایی و پارامترهای ژئوتکنیکی خاک را بهوجود میآورد. از این رو استفاده از روشی مناسب برای بهسازی خاکهای آلوده همواره مد نظر بوده است؛ به گونهای که در دهه اخیر و در پی افزایش تحقیقات در مورد استفاده از روشهای مختلف زیستی در بهسازی (Improvement) و بهپالایی (Purification) خاکها، از روش رسوب میکروبی کلسیم کربنات (MICP) در حل بسیاری از مشکلات ژئوتکنیکی بهره برده شده است. به همین منظور در این پژوهش، یک نوع خاک ماسهای پس از اختلاط با یک نوع آلاینده هیدروکربنی (روغن موتور) مخلوط و پس از انجام برخی آزمونهای مکانیک خاک کلاسیک (تراکم، برش مستقیم، تکمحوری و نفوذپذیری) فرآیند بهسازی به دو روش استفاده از محلول باکتری (تزریق دو مرحلهای) و اختلاط فلوکه باکتری (Bacterial Flocs) با تزریق محلول سیمانتاسیون انجام و نتایج بهسازی گزارش شده است. استفاده از آنالیز شیمی تر، SEM و EDS نیز جهت تائید و تفسیر بهتر نتایج آمده است. | ||
کلیدواژهها | ||
بهسازی زیستی؛ رسوب کلسیم کربنات؛ خاکهای آلوده؛ تزریق و فلوکه باکتری | ||
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مراجع | ||
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