کاربرد روش سطح پاسخ جهت بهینه‌سازی حذف رنگزای راکتیو بلک5 با استفاده از آهن (VI)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم و مهندسی محیط ‌زیست دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران.

2 رئیس هیئت مدیره و مدیر تحقیق و توسعه صنعت سبز طبرستان، محمودآباد، ایران.

چکیده

امروزه توسعة سریع صنایع و بکارگیری صدها ترکیب شیمیایی جدید در آن­ ها، باعث پیدایش مقادیر عظیمی فاضلاب صنعتی شده که تخلیة آن­ ها به محیط­ زیست خصوصاً جریان­ های آب، آلودگی ­های شدیدی به‌وجود آورده است. تخلیة پساب­ های رنگی به اکوسیستم­ های طبیعی به‌دلیل عملکردهای نامطلوب، خطرات جدی از جمله سرطان­ زایی، جهش ­زایی و غیره را برای حیات آبی ایجاد کرده است. در این میان، رنگزای ری­اکتیو بلک 5، در سطح جهان کاربرد صنعتی بسیار زیادی به‌خصوص در صنعت نساجی دارد. آهن (VI) به روش الکتروشیمیایی با استفاده از الکترودهای آهن و استیل در محلول پتاسیم هیدروکسید در دمای 65 درجة سانتی ­گراد سنتز شد و سپس جهت حذف مادة رنگزای ری­اکتیو بلک 5 در سیستم حذف ناپیوسته مورد استفاده قرار گرفت. در این مطالعه از روش پاسخ سطح (RSM)، اثر پارامترهای مختلف شامل pH اولیة رنگ، دوز آهن (VI) و زمان و در ادامه از طرح مرکب مرکزی (CCD) برای یافتن بهترین شرایط حذف مورد استفاده قرار گرفت. مقادیر بهینه برای سه متغیر pH، دوز آهن (VI) و زمان به‌ترتیب برابر با 4/5، 24/5میلی­ گرم و 25 دقیقه به‌دست آمد. در مطالعة حاضر با افزایش دوز آهن (VI) و با گذشت 25 دقیقه از شروع واکنش، بازدهی حذف افزایش یافته، در صورتی که حذف در شرایط اسیدی بهتر از شرایط قلیایی بود. همچنین تحت شرایط بهینه، محلول آهن (VI) توانست 97 درصد از رنگزای ری­اکتیو بلک 5 را حذف نماید. در نهایت تحت همین شرایط بر روی پساب واقعی نیز کار شده است و میزان حذف برابر با 95 درصد به‌دست آمد. یافته­ های این تحقیق نشان داد که آهن (VI) می­ تواند به‌عنوان یک عامل اکسید‌کنندة مناسب، ارزان قیمت و با کارایی بالا در حذف رنگزای ری­اکتیو بلک 5 از پساب صنایع نساجی بکار گرفته شود.

کلیدواژه‌ها

عنوان مقاله [English]

Application of response surface method to optimize the removal of reactive black 5 using Fe (VI)

نویسندگان [English]

  • Fatemeh Tehrani 1
  • Nader Bahramifar 1
  • Abbas Seifi 2

1 Department of Environmental Sciences, Faculty of Natural Resources and Marine Science, Tarbiat Modares University, Noor, Iran.

2 Chairman of the Board and Director of Research and Development of Green Industry Tabarestan, Mahmoudabad, Iran.

چکیده [English]

Today, the rapid development of industries and the use of hundreds of new chemical compounds in them have led to the creation of huge amounts of industrial wastewater, the discharge of which into the environment, especially watercourses, has caused severe pollution. The discharge of colored wastewater into natural ecosystems has created serious risks such as carcinogenesis, mutagenicity, etc. for aquatic life due to adverse functions. Meanwhile, Reactive Black 5 has many industrial applications, especially in the textile industry worldwide. Fe (VI) was synthesized electrochemically using iron and steel electrodes in potassium hydroxide solution at 65 ° C and then used to remove the reactive Black 5 in the batch removal system. In this study, the surface response method (RSM), the effect of various parameters including initial color pH, Fe (VI) dose and time and then the central composite design (CCD) were used to find the best removal conditions. The optimal values for the three variables of pH, Fe (VI) dose and time were obtained 4.5, 24.5 mg and 25 minutes, respectively. In the present study, by increasing the Fe (VI) dose and after 25 minutes from the start of the reaction, the removal efficiency increased, if the removal was better in acidic conditions than in alkaline conditions. Also, under the optimal conditions of Fe (VI) solution, it was able to remove 97% of reactive black 5. Finally, under the same conditions, real wastewater was also worked on and the removal rate was 95%. The findings of this study showed that Fe (VI) can be used as a suitable, inexpensive and high-performance oxidizing agent in the removal of reactive Black 5 from textile industry effluents.

کلیدواژه‌ها [English]

  • Fe (VI)
  • Textile industry Wastewater
  • Electrochemical method
  • Surface response method
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