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
Mouedhena, G., Feki, M., Wery, M.P., and Ayedi, H.F. (2008) Behavior of aluminum electrodes in electrocoagulation process J. Hazardous Materials 150, 124-135 Bazrafshan, E., Mahvi, A. H., Naseri, S., and Mesdaghinia, A. R. (2008) Performance evaluation of electrocoagulation process for removal of chromium (VI) from synthetic chromium solutions using iron and aluminum electrodes Turkish J. of Engineering and Environmental Science 32, 1-8 Escobar, C., Soto-Salazar, C., and Toral, M. (2006) Optimization of the electrocoagulation process for the removal of copper, lead and cadmium in natural waters and simulated wastewater J. of Environmental Management 181 (4), 384-391 Heidmann, I., and Calmano, W. (2008) Removal of Cr (VI) from model wastewaters by electrocoagulation with Fe electrodes J. Separation and Purification Technology 61 (1), 15-21 Gomes, J. A.G., Daida, P., Kesmez, M., Weir, M., Moreno, H., Parga, J. R, Irwin, G., Whinney, H., Grady, T., Peterson, E., and Cocke, D. L. (2007) Arsenic removal by electrocoagulation using combined Al–Fe electrode system and characterization of products 139 (2), 220-231 Heidmann, I., and Calmano, W. (2008) Removal of Zn(II), Cu(II), Ni(II), Ag(I) and Cr(VI) present in aqueous solutions by aluminium electrocoagulation J. Hazardous Materials 152, 934-941 Merzouk, B. (2008) Removal turbidity and separation of heavy metals using electrocoagulation–electroflotation technique. A case study J. of Hazardous Material 228 (1-3), 245-254 Meunier, N., Drogui, P., Montan´e, C., Hausler, R., Mercier, G., Franc, J., and Blais, O. (2006) Comparison between electrocoagulation and chemical precipitation for metals removal from acidic soil leachate J. Hazardous Materials 137, 581-590 Modirshahla, N., Behnajady, M.A., and Mohammadi-Aghdam, S. (2008) Investigation of the effect of different electrodes and their connections on the removal efficiency of 4-nitrophenol from aqueous solution by electrocoagulation J. of Hazardous Materials 154 (1-3), 778-786 Aber, S., Amani-Ghadim, A.R., and Mirzajani, V. (2009) Removal of Cr(VI) from polluted solutions by electrocoagulation: Modeling of experimental results using artificial neural network J. Hazardous Materials 171 (1-3), 484-490 Jafarzadeh, N., and Daneshvar, N. (2006) Treatement textile wastewater containing basic dyes by electrocoagulation process J. of Water and Wastewater 57, 22-29 Kashefiol-Asl, M., Khosravi, M., Mardani, R., Seyyedi, K., and Khataei, A. (2005) Investigation of treatment of yello basic 2 in wastewater by electrocoagulation J. of Enviornmental Sceinces and Tech 26, 66-76 Rahmani, A. R., and Samarghandi, M. R. (2009) treatment of color solution containing colored index Eriochrom Black T. J. of Water and Wastewater 69, 52-58 Mahvi, A. H., Bazrafshan, E., Mesdaghinia, A. R., Nasseri, S., and Vaezi, F. (2007) Chromium (C+6) removal from aqueous environments by electrocoagulation process using Aluminum electrodes J. of Water and Wastewater 62, 28-34 Saeedi, M., and Khalvati Fahlyain, A. (2010) COD preduction in effluent from soulthern Pars gas refinery using electrocoagulation J. of Water and Wastewater 73, 40-48 Mollah. M. Y. A., Morkovsky, P., Gomes, J. A., Kesmez, M., Parga. J., and Cocke, D. L. (2004) Fundamentals, present and future perspectives of electrocoagulation. J. Hazardous Materials 114 (1-3), 199-210 Mollah, M. Y. A., Schennach. R., Parga, J. R., and Cocke, D. L. (2001) Electrocoagulation (EC)- Science and applications J. Hazardous Materials 84 (1), 29-41 Yildiz, Y. S. (2008) Optimization of bomaplex red CR-L dye removal from aqueous solution by electrocoagulation using aluminum electrodes J. Hazardous Materials 153 (1-2), 194-200 Khorasani, N., Shaygan, J., and Karimi Shahri, N. (2005) A Survey on heavy metal concentration in the upper sediment layers of Bandar Abbas coasts J. of Iranian Natural Resources 58 (4), 861-869 Azad Shahraki, S., Ahmadi-Moghadam, A., Naseri, F., and Esmaeel Zadeh, A. (2007) Study the accumulation of Co, Ni and Cr in artemisia aucheri around sarcheshme copper complex, Iran Tertiary Conf. of Practical geology and environment, Azad Islamic University, Islamshahr Shapouri, V., Alavi Moghadam, M. R. M. R., and Ebadi, T. (2006) A Laboratory study on stabilization solidification of sludge in electroplating industries 11th Cong. of Iranian National Chemical Eng., Tarbiat Modares Univeristy, Terhan , 85-94 Roy, R. (1990) A primer on the Taguchi method, 1st Ed., Society of Manufacturing, Michigan Mohapatra, P. K. D., Maity, C., Rao, R. S., Pati, B. R., and Mondal, K. C. (2009) Tannase production by bacillus licheniformis KBR6: Optimization of submerged culture conditions by Taguchi DOE methodology J. of Food Research International 42 (4), 430-435 Pretorius, W. A., Johannes, W. G., and Lempert, G. (1991) Electrolytic Iron flocculant production with a bipolar electrode in series arrangement 172 (2), 133-138 Eaton, A. D., Clesceri, L. S., Rice, E. W., and Greenberg, A. E. (2005) Standard methods for the examination of water and wastewater 21st Ed., American Public Health Association, USA