مدل‌سازی و بهینه‌سازی حذف رنگ کاتیونی از محلول‌های آبی با استفاده از جاذب کم‌هزینه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت و ایمنی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

2 دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت،دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران

3 دانش آموخته کارشناسی ارشد و دانشجوی MPH، گروه مهندسی بهداشت محیط، دانشکده بهداشت و ایمنی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

4 دانش آموخته کارشناسی ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران

5 دانشجوی کارشناسی ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران

چکیده

متیلن‌بلو به‌عنوان یک رنگ کاتیونی به‌طور گسترده در سیستم‌های آبی یافت می‌شود و حضور آن در منابع آبی می‌تواند خطرناک باشد. بنابراین، این پژوهش با هدف بررسی گسترده کارایی کربن فعال تهیه شده از پسماندهای درخت انگور به‌دلیل خواص برجسته آن از جمله مقرون‌به‌صرفه بودن، ساخت و سنتز ساده، در دسترس و کاربردی بودن برای حذف متیلن‌بلو از محلول‌های آبی انجام شد. برای این منظور، تأثیر پارامترهای عملیاتی اصلی از جمله غلظت اولیه رنگ متیلن‌بلو 100 تا 500 میلی‌گرم در لیتر، مقدار جاذب 25/0 تا 25/12 گرم در لیتر، pH 3 تا 11 و زمان تماس 10 تا 90 دقیقه با استفاده از روش پاسخ سطح بهینه شد. نتایج به‌دست آمده نشان داد که بیش از 8/97 درصد متیلن‌بلو حذف شده است. داده‌های تجربی آزمایش با مدل فروندلیچ 99/0=R2 تطابق داشت و حداکثر ظرفیت جذب برابر با 23/2 میلی‌گرم در گرم بود. همچنین، سینتیک جذب به‌خوبی از واکنش شبه‌مرتبه دوم 91/0=R2 پیروی کرد. این پژوهش نشان می‌دهد که پسماندهای چوب درخت انگور می‌توانند به‌عنوان یک کاندیدای جایگزین برای جذب متیلن‌بلو از محیط‌های آبی استفاده شوند.

کلیدواژه‌ها

عنوان مقاله [English]

Modeling and Optimization of Cationic Dye Removal from Aqueous Solution Using Low-Cost Adsorbent

نویسندگان [English]

  • Mohammad Rafiee 1
  • Seyyedalireza Mousavi 2
  • Majid Faraji 3
  • Davood Shahbazi 4
  • Danial Nayeri 5
1 Assist. Prof., Dept. of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Assoc. Prof., Dept. of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
3 Former Graduate Student and MPH student, Dept. of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Former Graduate Student, Dept. of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
5 MSc. Student, Dept. of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
چکیده [English]

Methylene blue as a cationic dye is ubiquitously found in aquatic systems and its presence in water resources can be hazardous. Therefore, this study aimed to investigate extensively the efficiency of activated carbon prepared from grapevine for removing Methylene Blue from aqueous solutions because of its outstanding properties such as cost-effectiveness, simple synthesis, availability, and applicational.  For this purpose, the effect of the main operational parameters such as Methylene Blue initial concentration (500-100 mg/l), adsorbent dosage (0.25-12.25 g/l), pH (3-11), and contact time (10-90 min) was optimized through surface response method. The obtained results showed that more than 97.8% of MB has been removed. The experimental data were fitted to the Freundlich model (R2=0.99) and the maximum adsorption capacity was 2.23 mg/g. Also, the adsorption kinetics are well explained by the pseudo-second-order (R2=0.91). This study shows grape waste can be used as a potential alternative candidate for adsorption of Methylene Blue from aquatic environments.

کلیدواژه‌ها [English]

  • Methylene Blue
  • Adsorption
  • Grapevine
  • Wastewater
  • Water

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مجله آب و فاضلاب
دوره 31، شماره 7 - شماره پیاپی 131
بهمن و اسفند 1399
صفحه 190-201

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