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نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی بهداشت محیط ، دانشکده بهداشت ، دانشگاه علوم پزشکی بیرجند ،بیرجند ، ایران

2 مرکز تحقیقات عوامل اجتماعی موثر بر سلامت ،عضو گروه مهندسی بهداشت محیط دانشکده بهداشت ، دانشگاه علوم پزشکی بیرجند ،بیرجند ، ایران

چکیده

زمینه و هدف : امروزه آلودگی محیطی به عنوان یک مشکل اساسی زندگی روزمره ی انسان هاست. رنگ یکی از مهم ترین آلاینده های محیط زیست است که در پساب صنایع به خصوص صنایع نساجی به وفور دیده می شود . به همین دلیل هدف از این مطالعه بررسی کارایی فرآیند فتوکاتالیستی با استفاده از نانوذرات سبز آهن در حذف رنگ ری اکتیو رد 198 از محلولهای آبی قرار گرفته است.
مواد وروش ها : این مطالعه از نوع آزمایشگاهی است که با استفاده از یک راکتور ناپیوسته همراه لامپ UV A انجام شده است. در این مطالعه اثر متغییر های مختلف از جمله: pH(3-11) ، غلظت رنگ ری اکتیو رد (10-100 mg/l)، دوز (0.25-3 g/l) و زمان تماس(2-60min) بررسی گردید . خصوصیات نانو ذرات از تکنیک های مختلف TEM، FESEM و FTIR مورد بررسی قرار گرفت. تجزیه و تحلیل نتایج توسط نرم افزار Excel انجام گرفت .
یافته ها : آنالیزهای مختلف نشان داد که نانو ذرات سبز آهن تشکیل شده بیشترین درصد حذف در pH برابر با 3 ، دوز نانوکاتالیست g/L 5/1، زمان تماس 25 دقیقه و غلظت رنگ ری اکتیو رد 198، mg/L 25 برابر با 96.2% بدست آمد.
نتیجه گیری: نتایج نشان می دهد فرآیند فتوکاتالیستی با استفاده از نانوذرات سبز آهن می تواند با کارایی مناسبی جهت حذف رنگ ری اکتیو رد 198 از محلولهای آبی استفاده گردد.

کلیدواژه‌ها

عنوان مقاله [English]

Photocatalytic Process Using Green Iron Nanoparticles for azo dye degradation from aqueous solution

نویسندگان [English]

  • Ahmad Khosravi Baqdade 1
  • Taher Shahryari 2
  • Rasol Khosravi 2

1 2. MSc in Environmental Health Engineering, Faculty of Health, Birjand University of Medical Sciences, Birjand, Iran

2 Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran

چکیده [English]

Background and purpose: Today, environmental pollution is a major problem for human life. Dye is one of the most important environment pollutants that is found in the industrial wastewater, especially in the textile industry wastewater. Therefore, the aim of this study was to evaluate the photocatalytic effect of green iron nanoparticles as catalyst for Reactive red 198 dye degradation in photocatalytic process.
Materials and Methods: This study was performed laboratory using a batch reactor under UV A irradiation. In this study, the effect of different variables including pH (3-11), dye concentration (10-100 mg / l), catalyst dosage (0.25-3 g/l) and contact time (2-60 min) were investigated. The characterization of prepared nanoparticles were studied using different techniques such as TEM, FESEM and FTIR analysis. The obtained data were analyzed by Excel software.
Results :Also, the photocatalytic tests showed high performance of NPs for dye degradation as catalyst in photocatalytic process. The highest removal efficiency achieved 96.2% at pH 3, catalyst dosage 1.5 g / L, contact time 15 min, and for dye concentration 25 mg / L.
Conclusion :Additionally the results show that the photocatalytic process using green iron nanoparticles can be used with a suitable function to removal of reactive red 198 from aqueous solutions.

کلیدواژه‌ها [English]

  • Photocatalytic
  • Green iron nanoparticles
  • Reactive Red 198 dye
  • Aqueous solutions
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