طراحی فیلتر پلی‌اورتان اصلاح شده با پلی‌پیرول نانوساختار برای افزایش کیفیت آب پساب‌های شهری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی آب، دانشگاه ارومیه، ارومیه، ایران

2 دانشیار، گروه مهندسی آب، دانشگاه ارومیه، ارومیه، ایران

3 دانشیار، گروه مهندسی علوم و صنایع غذایی، دانشگاه ارومیه، ارومیه، ایران

چکیده

مطالعات زیادی در زمینه بررسی حذف آلاینده­های مختلف از آب با استفاده از نانو ذرات انجام شده است و نتایج بدست آمده بیانگر این است که این روش کارایی بسیار بالایی دارد. در این پژوهش فیلتر پلی­اورتان اصلاح شده با نانو مواد پلیمری برای بهبود کیفیت فاضلاب استفاده گردید. ساختار فیلتر و اندازه ذرات سنتز شده بوسیله تکنیک­های FT_IR و SEM بررسی شد. نتایج حاکی از آن است که پلیمرهای سنتز شده دانه­ای شکل بوده و به صورت یکنواخت سنتز شده­اند. اندازه ذرات سنتز شده در حدود 50 تا 120 نانومتر می­باشند. طرح آماری مرکب مرکزی برای بررسی اثر تعداد دفعات فیلتراسیون و نیز ارتفاع فیلتر در بهبود کیفیت نمونه­ی فاضلاب استفاده شد. کیفیت فاضلاب بعد از عمل فیلترشدن توسط روش اسپکتروسکوپی و دستگاه­های مختلفی مانند BOD متر و شوری سنج و ... بررسی گردید. نتایج حاصل نشان می­دهد که این فیلتر کارایی مطلوبی در بهینه کردن پارامترهایی نظیر مقدار کل جامدات محلول، اکسیژن مورد نیاز بیولوژیکی، اکسیژن مورد نیاز شیمیایی، رنگ، شوری، سختی و pH از نمونه فاضلاب داشته است. پس از مدلسازی داده­ها شرایط بهینه جهت بهبود کیفیت فاضلاب از قبیل تعداد دفعات عبوری نمونه­ی فاضلاب از فیلتر و ضخامت فیلتر با استفاده از روش گرافیکی به دست آمد. بهینه­ترین ضخامت برای فیلتر 3/1 سانتی­متر و مناسب­ترین تکرار فیلتراسیون 8 بار می­باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Design a New Polyurethane Filter Modified with Nano-sized Polypyrrole for Improving Municipal Waste Water Quality

نویسندگان [English]

  • Somayye Mostafavi 1
  • Vahid Rezaverdinejad 2
  • sajad pirsa 3
1 Ph.D Candidate, Department of Water Engineering, Urmia University, Urmia, Iran
2 Associate Professor, Department of Water Engineering, Urmia University, Urmia, Iran
3 Associate Professor, Department of Food Science and Technology, Urmia University, Urmia, Iran
چکیده [English]

Many studies have been conducted to investigate the removal of various pollutants from water using nanoparticles. The results indicate that this method has a very high efficiency. In this study, polyurethane filter is modified by nano sized polypyrrole (PPy) and used to improve the quality of the waste water. The chemical polymerization by in place method was used for polymerization of PPy. The Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FT-IR) was used for characterization of morphology, size and porosity of synthesized nano-polymers. The results indicate that the synthesized polymers are granular and uniformly (≈50 to 120 nm) synthesized on the polyurethane filter. Central Composite Design (CCD) was used to study the effect of filtration time and filter height on the improving of waste water quality. The quality of waste water after filtration was checked by spectroscopy and various devices such as BOD meters, salinity gauge and so. The results indicate that designed filter has a good performance in improving the parameters such as total dissolved solids (TDS), biological oxygen demand (BOD), chemical oxygen demand (COD), color, salinity, hardness and pH from waste water. After data modeling, optimal conditions for improving the quality of waste water such as the number of passing waste water samples from filter and filter thickness were obtained using graphical method. The optimum thickness for the filter is 1.3 centimeters and the most suitable filtration is 8 times.

کلیدواژه‌ها [English]

  • Polymeric filter
  • Nanostructures
  • Removal of chemical and physical pollutants
  • waste water
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