بهینه‌سازی فرایند انعقاد الکتریکی برای حذف کروم (VI) با روش تاگوچی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی عمران و محیط زیست، دانشگاه صنعتی امیر کبیر، تهران

2 دانشیار دانشکده مهندسی عمران- محیط زیست، دانشگاه صنعتی امیر کبیر، تهران

3 دانشیار دانشکده مهندسی نساجی، دانشگاه صنعتی امیر کبیر، تهران

4 استادیار پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران

چکیده

هدف از انجام این تحقیق، بهینه‌سازی فرایند انعقاد الکتریکی برای حذف کروم (VI) با استفاده از روش طراحی آزمایش (تاگوچی) بود. در این خصوص از یک راکتور حاوی شش الکترود موازی استفاده شد. تأثیر هفت پارامتر شامل جنس الکترود، جریان الکتریکی، زمان واکنش، pH اولیه، ولتاژ اولیه، غلظت اولیه کروم و دور همزن (شدت اختلاط) در دو سطح مختلف در فرایند انعقاد الکتریکی بررسی شد و در این رابطه از روش طراحی آزمایش تاگوچی مدل "OA_32" استفاده گردید. در بین این پارامترها، بیشترین تأثیر مربوط به پارامترهای شدت جریان الکتریکی و جنس الکترود و کمترین تأثیر مربوط به دور همزن بود. طبق نتایج این تحقیق، بیشترین میزان حذف کروم (33/168 میلی‌گرم در لیتر) در شرایط "الکترود آهنی، جریان الکتریکی 3 آمپر، زمان واکنش 20 دقیقه، pH اولیه 4، ولتاژ اولیه 6 ولت و غلظت اولیه کروم 400 میلی‌گرم در لیتر و دور همزن صفر" حاصل شد.


کلیدواژه‌ها


عنوان مقاله [English]

Optimization of the Electrocoagulation Process for Removal of Cr(VI) Using Taguchi Method

نویسندگان [English]

  • Masoud Asadi Habib 1
  • Seyed Mohammad Reza Alavi Moghaddam 2
  • Mokhtar Arami 3
  • Seyed Hossein Hashemi 4
1 M.Sc. of Civil and Environmental Eng., Amirkabir University of Technology (AUT), Tehran
2 Assoc. Prof. of Civil and Environmental Eng., Amirkabir University of Technology (AUT), Tehran
3 Assoc. Prof. of Textile Eng., Amirkabir University of Technology (AUT), Tehran
4 Assist. Prof., of Environmental Science Research Institute, Shahid Beheshti University (SBU), Tehran
چکیده [English]

The aim of this study was to optimize electrocoagulation process for removal of chromium (VI) using Taguchi method. An elecrtrocoagulation reactor with six parallel electrodes was used in this study. For this purpose, effects of 7 parameters such as electrode material, electric current, time of reactions, initial pH, initial voltage, initial chromium concentration and rpm of impeller (agitation intensity) in two different levels were studied. Model of "OA_32" of Taguchi experimental design method was used. Among the above-mentioned parameters, electric current and electrode material had highest effects and rpm of impeller had the lowest effect on the electrocoagulation performance. According to the obtained results, highest chromium removal (168.33 mg/L) observed in the following conditions: electric current=3A, time of reaction=20min, initial pH=4, initial voltage=6v, initial chromium concentration=400mg/L, rpm of impeller=0rpm and iron as electrode material

کلیدواژه‌ها [English]

  • Chromium (VI)
  • Electrocoagulation
  • optimization
  • Taguchi method
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