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بررسی مکانیزم مهاجرت الکتریکی فلز سنگین از رسوبات دریایی با استفاده از پیل میکروبی پاکسازی رسوب | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 4، دوره 52.3، شماره 108، آذر 1401، صفحه 29-37 اصل مقاله (2.14 M) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jcee.2020.10638 | ||
نویسندگان | ||
مرضیه رضوی1؛ داریوش یوسفی کبریا* 2؛ آتیه ابراهیمی2 | ||
1دانشکده مهندسی عمران، مؤسسه آموزش عالی آفرینش بروجرد | ||
2دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل | ||
چکیده | ||
یکی از روش های پاکسازی خاک و رسوبات آلوده دریا به فلزات سنگین استفاده از روش الکتروکینتیک (Electrokinetic) می باشد که در آن با اعمال میدان الکتریکی ضعیف به کمک منبع تغذیه خارجی آلاینده ها با مکانیزم های مختلف به ویژه مهاجرت الکتریکی از محیط خاکی جداسازی می شوند اما به دلیل هزینه های تأمین جریان الکتریسیته چندان مقرون به صرفه نیست. از طرفی یکی از راه های تولید جریان الکتریکی استفاده از پیل های سوختی میکروبی است که در آن باکتری ها با حذف مواد آلی، الکترون آزاد می کنند. بنابراین در این تحقیق جهت تولید میدان الکتریکی سبز، از فرآیند پیل سوختی میکروبی با سه الکترود مختلف در آند و ترکیب با گرانول کربن فعال استفاده شد تا میزان حذف فلز سنگین کروم 6 ظرفیتی از رسوبات دریایی براساس مکانیزم مهاجرت الکتریکی مورد ارزیابی قرار گیرد. نتایج نشان میدهد میزان توان الکتریکی تولیدی به صورت قابلتوجهی وابسته به نوع الکترود آند بوده و بیشترین میزان چگالی توان در حالت استفاده از الکترود ترکیبی گرافیت با گرانول کربن فعال به دلیل ایجاد شرایط بستر مناسب تر برای چسبیدن باکتـری ها و همچنین نرخ بالاتر انتقال الکترون به الکترود و تغذیه محفظه آند با فاضلاب واقعی 02/0±10 وات بر مترمکعب مشاهده گردید. در این شرایط بیشترین میزان حذف کروم حدود 64 تا 73 درصد به ترتیب در ناحیه کاتد و آند حاصل گردید. به طور کلی میتوان نتیجه گرفت استفاده از کربن فعال زیستی میتواند ضمن ارتقای توان تولیدی پیل سـوختی میکروبی عملکرد مناسبی در پاکسازی رسوبات آلوده دریایی به فلزات سنگین داشته باشد. | ||
کلیدواژهها | ||
پیل سوختی میکروبی؛ رسوبات دریایی؛ الکتروکینتیک؛ حذف فلز سنگین کروم | ||
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مراجع | ||
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