بررسی کارایی فرایند الکتروپرسولفات در تخریب غلظت‌های بالای آنتی‌بیوتیک سفتریاکسون از پساب‌های دارویی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار گروه مهندسی بهداشت محیط، دانشکده بهداشت و مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان، ایران

2 دانش‌آموخته کارشناسی ارشد مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، ایران

3 دانشجوی کارشناسی مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، ایران

چکیده

استفاده از یون‌های دو ظرفیتی آهن یکی از روش‌های فعال‌سازی آنیون پرسولفات است. هدف از این پژوهش، فعال‌سازی الکتریکی آنیون پرسولفات و بررسی کارایی فرایند در تجزیه آنتی‌بیوتیک سفتریاکسون از پساب‌های سنتتیک دارویی بود. در این پژوهش، از یک راکتور منقطع به حجم مفید 1 لیتر، مجهز به الکترودهای آهن متصل به دستگاه تولید جریان مستقیم استفاده شد. تأثیر پارامترهای pH، ولتاژ، غلظت پرسولفات و غلظت اولیه سفتریاکسون بر کارایی فرایند سنجیده شد. میزان خوردگی الکترودها، اثرات هم‌افزایی پارامترها، تعیین سینتیک واکنش و میزان حذف COD بررسی شد. نتایج نشان داد پارامترهای اشاره شده تأثیر چشمگیری بر کارایی دارند، کارایی فرایند در شرایط pH برابر 3، ولتاژ10 ولت، غلظت پرسولفات 50 میلی‌مول در لیتر و غلظت اولیه سفتریاکسون 18/0 میلی‌مول در لیتر در مدت زمان 45 دقیقه، 96 درصد تعیین شد. با تغییر پارامترها از حالت بهینه، کارایی فرایند کاهش یافت. کارایی فرایند در حذف COD در مدت زمان بهینه، 72 درصد بود. همچنین سینتیک فرایند درجه یک بود. بهره‌گیری از فرایند الکتریکی در راستای فعال‌سازی آنیون پرسولفات دارای مزایای عمده مانند کاهش مصرف آهن دو ظرفیتی و دستیابی به کارایی بالا در حذف آنتی‌بیوتیک است. این روش می‌تواند به‌عنوان یک روش جایگزین برای تصفیه آلاینده‌های مقاوم و کاهش آلودگی‌ها باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Efficiency of Electro/Persulfate (EPS) Process in Degrading High Concentrations of Ceftriaxone in Pharmaceutical Effluents

نویسندگان [English]

  • Mohammadreza Samarghandi 1
  • Amir Shabanlo 2
  • Elham Nazari 3
  • Mahboobeh Sadri 3
  • Jamal Mehralipour 2
1 Assoc. Prof. of Environmental Health Engineering, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
2 Former Graduate Student of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
3 BS. Student of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
چکیده [English]

Two-valent iron ions can be used to activate persuphate anions. The objective of the present study was to investigate the electrical activation of persuphate anions and to determine the efficiency of electro-persulphate in the removal of ceftriaxone antibiotic from synthetic pharmaceutical effluents. For this purpose, a reactor (with an effective volume of 1 L) equipped with iron electrodes connected to a DC power supply was used and the effects of pH, voltage, persulphate content, and ceftriaxone initial concentration on the efficiency of the process were studied. Moreover, electrode corrosion, synergistic effects of the parameters studied, reaction kinetics, and chemical oxygen demand (COD) removal were studied. Results showed that the variables had a significant effect on process efficiency such that 96% of the ceftriaxone in the effluent was removed under the following optimum conditions: pH: 3, voltage: 10 V, a persulphate concentration of 50 mM/L, a ceftriaxone initial concentration of 0.18 mM/L, and a reaction time of 45 min. However, removal efficiency declined when the above conditions changed. It was also observed that COD removal was 72% in the optimum reaction time. Moreover, the process kintetics was found to be a first-order one. Application of an electrical process to active persulphate anion is assoiated with such advantages as reduced iron consumption and high antibiotic removal efficiency. Based on the results obtained, the proposed method may be recommended as an alternative for treating persistent pollutants to reduce environmental pollution.

کلیدواژه‌ها [English]

  • Electrochemical Process
  • Persulphate Anion
  • Ceftriaxone
  • Synthetic Effluents

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مجله آب و فاضلاب
دوره 27، شماره 4 - شماره پیاپی 104
پیاپی: 104
مهر و آبان 1395
صفحه 15-25

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