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نوع مقاله : مقالات پژوهشی

نویسندگان

1 کارشناسی ارشد، گروه مهندسی بهداشت محیط، کمیته تحقیقات دانشجویی، دانشکده بهداشت، دانشگاه علوم پزشکی مشهد، مشهد، ایران.

2 دانشیار، گروه مهندسی بهداشت محیط، مرکز تحقیقات مدیریت و عوامل اجتماعی مؤثر بر سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی مشهد، مشهد، ایران.

3 دانشجوی دکترای مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران.

4 کارشناس، گروه مهندسی بهداشت محیط، کمیته تحقیقات دانشجویی، دانشکده بهداشت، دانشگاه علوم پزشکی مشهد، مشهد، ایران.

چکیده

زمینه و هدف: از میان انواع مختلف آنتی‌بیوتیک‌ها، تتراسایکلین‌ها دومین گروه شایع آنتی‌بیوتیک­ها از نظر تولید و مصرف در سراسر جهان هستند که ورود آنها به فاضلاب خانگی می‌تواند منجر به آلودگی منابع آب شود. مطالعه حاضر با هدف تعیین کارایی فرآیند تلفیقی اولتراسونیک/ تابش فرابنفش در حذف آنتی‌بیوتیک تتراسایکلین از محلول­های آبی انجام شد.
مواد و روش‌ها: این مطالعه تجربی با استفاده از حمام اولتراسونیک و در حضور اشعه ماوراء بنفش انجام گرفت. به منظور سنجش تأثیر متغیرهای زمان تماس (60-5 دقیقه)، غلظت اولیه آنتی‌بیوتیک ( mg/l5-25)،  pH(3-10)، و توان ورودی (300-100 وات) بر فرآیند، از راکتور در فواصل زمانی مشخص نمونه‌برداری و غلظت باقی‌مانده توسط دستگاه اسپکتروفتومتر در طول موج 261 نانومتر قرائت گردید. تجزیه و تحلیل داده­ ها با استفاده از آزمون ANOVA انجام گرفت.
یافته‌ها: در این مطالعه تابش فرابنفش و اولتراسونیک در بهترین شرایط به ترتیب 16 و 32 درصد راندمان در حذف این آلاینده داشتند. با به‌کارگیری همزمانUS/UV ، کارایی حذف آنتی‌بیوتیک افزایش یافت و بهترین راندمان در 4/5=pH، غلظت اولیه آنتی‌بیوتیک mg/l 10 و توان ورودی 240W حاصل شد. در این شرایط بعد از زمان تماس 50 دقیقه، راندمان حذف 72 درصد برای آنتی‌بیوتیک تتراسایکلین حاصل گردید.
نتیجه‌گیری: از فرآیند تلفیقی اولتراسونیک/ تابش فرابنفش می‌توان به عنوان یک فرآیند مؤثر برای حذف آنتی‌بیوتیک تتراسایکلین از محلول­های آبی استفاده کرد.

کلیدواژه‌ها

عنوان مقاله [English]

Performance evaluation of combined Ultrasonic/UV process in Removal of Tetracycline Antibiotic from Aqueous Solutions using Response surface Methodology

نویسندگان [English]

  • Mohsen Yazdani 1
  • Ali Asghar Najafpoor 2
  • Ali Akbar Dehghan 3
  • Hossein Alidadi 2
  • mahmood dankoob 1
  • Reyhane Zangi 4
  • Sima Nourbakhsh 1
  • Reza Ataei 1
  • Ali Asghar Navaei fezabady 1

1 MS.c. Department of Environmental Health Engineering, Student Research Committee, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.

2 Associate Professor, Department of Environmental Health Engineering, Management & Social Determinants of Health Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.

3 PhD Student of Environmental Health Engineering. Department of Environmental Health Engineering, School of Health, Tehran University of Medical Sciences, Tehran, Iran.

4 B.S. Department of Environmental Health Engineering, Student Research Committee, School of Health, Mashhad University of Medical Science, Mashhad, Iran.

چکیده [English]

Background and objectives: Tetracycline is known as the second high consumed groups of antibiotics throughout the world, which their entrance into the domestic wastewater will lead to pollute the water resources. The aim of this study was to determine the performance of combined Ultrasonic/UVprocess in removal of tetracycline antibiotic from aqueous environments.
 
Material and methods: This experimental study was performed by the ultrasonic bath associated with ultraviolet radiation. To determine the effects of independent variables including contact time (5-60 min), initial antibiotic concentration (5-25 mg/l), pH (3-10) and the input power (100- 300 W) on response variable (tetracycline removal), the samples were taken from reactor in different time intervals and the residual concentrations of tetracycline were measured by spectrophotometer in 261 nm wavelength.
Results: The results of this study showed that the removal efficiency of UV and Ultrasonic processes was16% and 32% in optimum conditions, respectively. While in Ultrasonic /UV process, removal efficiency increased. The best removal efficiency (72%) was observed in  pHof 4.5, antibiotic concentrationof10 mg/I, input power of240 W and contact timeof50 min.
 Conclusion: According to the obtained results, Ultrasonic/UVprocess can be used as an effective process to remove the tetracycline antibiotic from aqueous solutions.

کلیدواژه‌ها [English]

  • Antibiotic
  • ultraviolet waves
  • Ultrasound
  • aqueous solutions
  • Response Surface Method
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