مجله علوم، مهندسی و فناوری هسته‌ای

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مطالعه جذب زیستی اورانیل از محلول آبی توسط تفاله چای به روش RSM

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، نفت، گاز، دانشگاه سمنان، صندوق پستی: 19111-35131، سمنان ـ ایران

2 پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران

چکیده

با توسعه فعالیت‌های هسته‌ای مختلف، تولید پساب‌های حاوی یون‌های فلزی سنگین افزایش یافته است. یکی از مهم‌ترین یون‌های فلزی که مضرات زیادی برای محیط زیست و موجودات زنده و به خصوص انسان دارد، یون اورانیل است. روش‌های زیادی برای حذف یون‌های فلزی وجود دارد که جذب زیستی ارزان‌ترین و کاراترین روش است. در این تحقیق به جذب یون اورانیل از محلول‌های آبی توسط تفاله چای پرداخته شده است. تفاله چای به دلیل حضور گروه‌های عاملی مختلف مانند کربوکسیل، هیدروکسیل، آمین و ... از پتانسیل مناسبی جهت جذب یون‌های فلزی برخوردار است. پارامترهای مؤثر در جذب از جمله پارامترهایpH، میزان جاذب، دما، غلظت اولیه اورانیل و زمان تماس بررسی شدند و از روش سطح پاسخ (RSM) برای انجام آزمایش‌ها‌ و تحلیل نتایج استفاده شد. نقطه بهینه برای جذب اورانیل توسط جاذب تفاله چای pH=3.9، دما °25C، میزان جاذب  0/275g، غلظت اولیه اورانیل 10mg/L و زمان تماس 90 دقیقه به ­دست آمد. ایزوترم فرندلیچ و مدل شبه مرتبه دوم بهترین مدل ایزوترم و سینتیکی برازش شده با نتایج است. نتایج نشان داد که جاذب زیستی تفاله چای، عملکرد مطلوبی برای جذب اورانیل از پساب واقعی داشته و میزان جذب 93/50% است.

کلیدواژه‌ها

عنوان مقاله [English]

Study of biosorption of uranyl from aqueous solution by tea waste using RSM method

نویسندگان [English]

  • M. Taheri 1
  • M. Khajenoori 1
  • Z. Shiri-Yekta 2
  • F. Zahakifar 2

1 Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, P.O.Box: 35131-19111, Semnan – Iran

2 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-8486, Tehran - Iran

چکیده [English]

Heavy metal ions have increased wastewater production with the development of various nuclear activities. One of the most significant metal ions that harm the environment and living organisms, especially humans, is the uranyl ion. There are many methods to remove metal ions, and biological adsorption is the cheapest and most efficient method. In this research, the absorption of uranyl ions from aqueous solutions from tea waste has been studied. Due to the presence of various functional groups such as carboxyl, hydroxyl, amine, etc, tea wastes have good cations adsorption ability. The effective parameters in adsorption including pH, adsorbent dose, temperature, initial uranyl concentration, and contact time parameters were investigated. Response surface methodology (RSM) was used to conduct experiments and analyze the results. The optimum conditions for uranyl adsorption by tea waste adsorbent were pH = 3.9, temperature 25°C, adsorbent dose 0.275 g, initial concentration of uranyl 10 mg/L, and contact time 90 minutes. Using Freundlich's isothermal and pseudo-second-order models, we fitted the most accurate isothermal and kinetic models. Results showed that tea waste was a good bio adsorbent for uranyl adsorption from real wastewater with a 93.50% adsorption rate.

کلیدواژه‌ها [English]

  • Biosorption
  • Tea waste
  • Uranyl
  • Response surface methodolog
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مجله علوم، مهندسی و فناوری هسته‌ای
دوره 45، شماره 3 - شماره پیاپی 109
مهر 1403
صفحه 1-12
فایل ها
هم رسانی
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