مدلسازی و شبیه‌سازی فرایند جذب سطحی پیوسته یون کادمیوم ‏‎(II)‎‏ بر روی جاذب زیستی لوفا سیلیندریکا با استفاده از روش ترکیبی ‏دینامیک سیالات محاسباتی- طراحی آزمایش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی شیمی، دانشگاه صنعتی ارومیه، ارومیه، ایران

2 ‏1گروه‎ ‎مهندسی‎ ‎شیمی،‎ ‎دانشگاه‎ ‎صنعتی‎ ‎ارومیه،‎ ‎ارومیه،‎ ‎ایران

3 ‏گروه‎ ‎مهندسی‎ ‎شیمی،‎ ‎دانشگاه‎ ‎صنعتی‎ ‎ارومیه،‎ ‎ارومیه،‎ ‎ایران

4 گروه‎ ‎مهندسی‎ ‎شیمی،‎ ‎دانشگاه‎ ‎صنعتی‎ ‎ارومیه،‎ ‎ارومیه،‎ ‎ایران

چکیده

کادمیوم یکی از مضر‌ترین فلزات سنگین است و به دلیل ماندگاری بالا در آب‌های زیر‌زمینی، به نگرانی فزایندهای در طی دهه‌های ‏گذشته تبدیل‌شده است. هدف از انجام این پژوهش آنالیز و بررسی جذب سطحی کادمیوم ‏II‏ توسط جاذب طبیعی لوفا سیلیندریکا ‏به روش دینامیک سیالات محاسباتی است. بعد از اعتبارسنجی نتایج آزمایشگاهی و شبیه‌سازی، اثر پارامترهای طول و تخلخل ‏بستر بر میزان جذب مورد بررسی قرار گرفت. همچنین تأثیر دبی سیال، غلظت ورودی کادمیوم ‏ll، طول و تخلخل بستر توسط ‏روش طراحی آزمایش مطالعه شد. در نهایت، پس‌از بهینه‎‌‎سازی توسط روش طراحی آزمایش، غلظت ورودی 50 میلی‌گرم بر لیتر، ‏دبی 612/10 میلی‌لیتر بر دقیقه، تخلخل بستر 66/0و طول بستر 51/14 سانتیمتر به‌عنوان شرایط بهینه انتخاب شد که بیشترین ‏مقدار یون کادمیوم جذب‌شده در این شرایط برابر 05/122 میلی‌گرم و بیشترین ظرفیت تعادلی جذب برابر 21/20 میلی‌گرم بر ‏گرم بدست آمد. مطالعات نشان داد که افزایش جریان دبی سیال و تخلخل منجر به کاهش میزان جذب و در مقابل، افزایش ‏غلظت و طول بستر منجر به افزایش میزان جذب می‌شود.‏

کلیدواژه‌ها

موضوعات


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