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نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشیار گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی سبزوار، سبزوار، ایران

2 پژوهشگر گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی گناباد، گناباد، ایران گروه مهندسی بهداشت محیط، دانشکده بهداشت،دانشگاه علوم پزشکی کاشمر،کاشمر، ایران

3 دانشجوی کارشناسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی سبزوار، سبزوار، ایران

4 دانشجوی کارشناسی ارشد بهداشت محیط،دانشکده بهداشت،دانشگاه علوم پزشکی سبزوار ، سبزوار ، ایران

چکیده

زمینه و هدف: آنتی‌بیوتیک ها از آلاینده­هایی هستند که دفع و رها سازی آنها در محیط می‌تواند مشکلات زیست محیطی جدی را به‌وجود آورد.  مطالعه حاضر با هدف بررسی حذف سولفا دی متوکسین از محلول­های آبی با استفاده از نانولوله های کربنی انجام گرفت.
مواد و روش‌ها:در این پژوهش تجربی- مشاهده‌ای تأثیر پارامترهای مختلفی از قبیل pH، زمان، دوزهای مختلف نانولوله و همچنین غلظت‌های مختلف سولفا دی متوکسین مورد بررسی قرار گرفت. تمام آزمایشات در یک راکتور 100 میلی­لیتری، در دمای آزمایشگاه (oC 24 ±2) با استفاده از همزن مغناطیسی با سرعت rpm 350 انجام گرفت.
یافته‌ها: حداکثر راندمان حذف در 6=pH، دوز جاذب 0/04g، زمان تماس 30min و غلظت اولیه 20mg/L بود که 94/5 به‌دست آمد. یافته­ها نشان داد که ظرفیت جذب با افزایشpH  افزایش می­یابد و در 6=pH به حداکثر مقدار خود می­رسد و سپس مجدداً کاهش پیدا می­کند. میزان حذف با افزایش دوز نانولوله افزایش یافته و برای غلظت 100mg/L و حجم 50mL، دوز 0/04g بهینه است. میزان جذب با افزایش زمان تماس افزایش یافته و حداکثر جذب در زمان تماس 30min اتفاق می­افتد. جذب آنتی‌بیوتیک سولفا دی متوکسین از مدل ایزوترم لانگمویر (0/9800=R2) و سینیتیک درجه دوم کاذب (09937=R2) پیروی می­کند.
نتیجه‌گیری:نانولوله­های کربنی به دلیل داشتن خصوصیاتی نظیر مساحت سطحی بالا، پتانسیل زیادی در حذف سولفا دی ­متوکسین از محلول آبی دارند.

کلیدواژه‌ها

عنوان مقاله [English]

Removal of sulfadimethoxine antibiotic from aqueous solutions using carbon nanotubes

نویسندگان [English]

  • Abolfazl Rahmani Sani 1
  • Ahmad Hosseini Bandehgharaei 2
  • Mahsa Naeemi 3
  • Ameneh Navidzadeh 3
  • Elham Agheli 4

4 M.Sc. Student, Environmental Health, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran

چکیده [English]

 
Background and aim:Antibiotics are a category of organic pollutants that can cause serious environmental problems through their disposal and uncontrolled release to the environment. The purpose of this study was to investigate the removal of sulfadimethoxine from aqueous solutions using carbon nanotubes.
Materials and Methods:The present work was an experimental study in which the effects of different parameters, such as PH, contact time, doses of carbon nanotubes, and different concentrations of sulfadimethoxine, on the removal of antibiotic from solutions were examined. All experiments were carried out in a 100-mL reactor at laboratory temperature (24 ± 2 ° C) using a magnetic stirrer at 350 rpm.
Results:The results showed that the maximum removal efficiency (94.5%) was occurred at pH = 6, adsorbent dosage 0.04 g, contact time of 30 min, and initial concentration of 20 mg/L. The findings on the effect of pH showed that the adsorption capacity increases with increasing pH, and at pH = 6, it reaches its maximum and then decreases again. The extent of removal was increased by increasing the dose of carbon nanotubes and the optimum amount for initial concentration of 100 mg/L (50 mL) was 0.04 g. The amount of absorption increased with increasing contact time and the maximum absorption occurred when the contact time was 30 min. The sulfadimethoxine antibiotic isotherm followed the Langmuir isotherm model (R2 = 0.9800) and the pseudo-second-order kinetic model (R2 = 0.9937).
Conclusion: The results showed that carbon nanotubes have a high potential for removal of sulfadimethoxine from aqueous solutions, due to its properties like its high surface area.

کلیدواژه‌ها [English]

  • Keywords: Sulfase-di-methoxone
  • drug contaminants
  • aqueous solution
  • carbon nanotubes
  • adsorption
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