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جذب متیلن بلو توسط بایوچار از محلولهای آبی | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 5، دوره 49، شماره 1، فروردین و اردیبهشت 1397، صفحه 51-57 اصل مقاله (624.01 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2018.212516.667511 | ||
| نویسندگان | ||
| سکینه نبی زاده* ؛ فردین صادق زاده؛ بهی جلیلی؛ مصطفی عمادی | ||
| دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| چکیده | ||
| بیوچار قابلیت حذف آلایندههای آلی از خاک، آب و رسوبات را دارد و از انتقال مواد سمی از محیط به گیاه و سایر موجودات میکاهد. در این تحقیق توانایی بیوچارهای مختلف جهت جذب متیلن بلو از محلول آبی مورد بررسی قرار گرفت. از چهار نوع ماده خام اولیه کاه برنج، پوسته برنج، باگاس نیشکر و خرده چوب نراد در دو شرایط دمایی 300 و 600 درجه سانتیگراد استفاده شد. آزمایشهای سینتیک جهت تعیین زمان تعادل، pH بهینه و مقدار جاذب انجام گرفت. همدما جذب متیلن بلو توسط بیوچار کاه برنج تولید شده در دمای 600 درجه سانتیگراد (ب. ک.600) تعیین شد. از بین بیوچارهای موجود، ب. ک. 600 بیشترین توانایی جذب متیلن بلو را داشت. جذب متیلن بلو توسط ب. ک. 600 بعد از گذشت 300 دقیقه به تعادل رسید. pH بهینه و مقدار جاذب به ترتیب 7 و 5/2 گرم بر لیتر تعیین شد. فرایند جذب متیلن بلو توسط ب. ک. 600 با مدل خطی همدما لانگمویر مطابقت داشت و حداکثر ظرفیت جذب 85/27 میلیگرم بر گرم به دست آمد. بنابراین ب. ک. 600 جاذب مناسبی برای حذف متیل بلو از محلولهای آبی است. | ||
| کلیدواژه‌ها | ||
| پساب؛ زمان تعادل؛ سینتیک؛ لانگمویر | ||
| عنوان مقاله [English] | ||
| Adsorption of methylene blue using biochar from aqueous solutions | ||
| نویسندگان [English] | ||
| sakineh nabizadeh؛ fardin sadeghzadeh؛ bahi jalili؛ mostafa emadi | ||
| Agricultural Sciences and Natural Resources University of Sari | ||
| چکیده [English] | ||
| biochar have the ability to remove organic pollutants from soil, water and sediments, and thus lowering their bioavailability and preventing toxic substances transferring from environment to plant and organisms. In this study, the ability of different biochars to adsorb the methylene blue (MB) was investigated. The biochars were produced from rice straw, rice husk, sugarcane bagasse and dicer wood chips in 300˚C and 600˚C temperature. Kinetic experiments were carried out to determine , optimum pH and adsorbent dosage. The adsorption isotherm was done using rice straw biochar (RSB) which is producing at 600˚C. The results showed` that RSB600˚C, had the most ability of methylene blue adsorption. Adsorption of methylene blue by RSB600˚C was equilibrated after 300 min. The optimum pH and adsorbent dosages were 7 and 2.5 g/L respectively. The methylene blue adsorption of RSB600˚C was fitted to Langmuir isotherm and maximum adsorption capacity of RSB600˚C was 27.85 mg/g. Therefore it can be concluded that RSB600˚C is a good reliable adsorbent for removal of MB from aqueous solutions. | ||
| کلیدواژه‌ها [English] | ||
| Effluent, contact time, Kinetic, Langmuir | ||
| مراجع | ||
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