کارایی فرایند تلفیقی الکتروکواگولاسیون با الکترودهای آهن و ستون فیلتری حاوی پامیس در حذف کروم و سیانید از فاضلاب شهرک صنعتی صفادشت

محورهای موضوعی : آلودگی محیط زیست (آب و فاضلاب)

سید محسن بلادی ¹ ( کارشناسی ارشد مهندسی عمران محیط زیست، گروه محیط زیست، دانشکده هنر و معماری، دانشگاه آزاد اسلامی واحد تهران غرب. )
رویا مافی غلامی ² ( دانشیار گروه محیط زیست، دانشکده هنر و معماری، دانشگاه آزاد اسلامی واحد تهران غرب. * (مسوول مکاتبات) )
مهراد مهردادیان ³ ( کارشناسی ارشد مهندسی عمران محیط زیست، گروه محیط زیست، دانشکده هنر و معماری، دانشگاه آزاد اسلامی واحد تهران غرب. )

تاریخ دریافت : 1401/12/08 تاریخ پذیرش : 1402/02/02 تاریخ انتشار : 1402/07/01

کلید واژه: فاضلاب شهرک صنعتی, فیلتراسیون, فرآیند انعقاد الکتریکی, پامیس,

چکیده مقاله :

زمینه و هدف: امروزه حفظ محیط زیست به امری ضروری برای جامعه تلقی می‌شود. تصفیه فاضلاب‌های صنعتی به دلیل مشخصات فیزیکوشیمیایی منحصر بفردی که دارند، نیازمند فرایندهای مختلف از جمله موثر هستند. کیفیت و کمیت فاضلاب صنعتی به دلیل وجود صنایع مختلف، پیچیده تر از فاضلاب انسانی است و به دلیل داشتن بار آلودگی بالا باید قبل از تخلیه به محیط زیست تصفیه گردد. فلزات سنگین یکی از دلایل ایجاد آلودگی‌ در فاضلاب صنعتی، هستند. فرایند انعقاد الکتریکی و فیلتراسیون به عنوان یک فرایند تلفیقی و دوستدار محیط زیست، دارای قابلیت بالایی در تصفیه فاضلاب‌هایی با آلودگی بالا است. روش بررسی: در این مطالعه از فرایند انعقاد الکتریکی در مقیاس آزمایشگاهی به‌منظور حذف فلز کروم (شش ظرفیتی) و سیانید استفاده شد. در این فرایند، تاثیر متغیرهای pH اولیه فاضلاب (9-5)، زمان واکنش) 600- دقیقه(، جریان الکتریکی اعمال شده (3-1آمپر( و ارتفاع بستر فیلتراسیون) 30-10سانتی‌متر) مورد بررسی قرار گرفتند. یافته ها: بر اساس نتایج به دست آمده بهترین شرایط فرایند انعقاد الکتریکی شامل pH برابر7 ، زمان انجام انعقاد الکتریکی برابر 60 دقیقه، جریان الکتریکی اعمال شده بر سطح الکترودها برابر 3 آمپر و ارتفاع پامیس به عنوان ماده فیلتر کننده در داخل ستون برابر 30 سانتی متر است. در این شرایط کارآیی حذف کروم و سیانید به ترتیب 92 و 88 درصد به دست آمد. بدین صورت که در شرایط بهینه تعیین شده، میزان غلظت کروم و سیانید از 13 و 9/08 میلی گرم به ترتیب به 1/56 و 0/72کاهش پیدا کرده است . بحث و نتیجه گیری: بر اساس استانداردهای ارایه شده توسط سازمان حفاظت محیط زیست ایران، پساب تصفیه شده توانایی تخلیه به محیط زیست را دارا است.

چکیده انگلیسی:

Background and Objectives: Nowadays, environmental preservation is considered a necessary matter for society. Industrial wastewater treatment requires various effective processes, due to their unique physicochemical characteristics. The quality and quantity of industrial wastewater are more complicated than human wastewater due to the presence of various industries and must be treated before being discharged into the environment due to their high pollution load. One of the common pollutants in industrial wastewater is heavy metals. The electrocoagulation and filtration process, as an environmentally friendly and integrated process, have a high capability in treating wastewater with high levels of pollution. Material and Methodology: In this study, the electrocoagulation process was used on a laboratory scale to remove chromium (hexavalent) and cyanide metal pollutants. In this process, the effect of various parameters, including the initial pH of the wastewater (5-9), reaction time (0-60 minutes), applied electric current (1-3 Amps), and filtration bed height (10-30 cm) were investigated. Findings: Based on the obtained results, the best conditions for the electrocoagulation process include a pH of 7, a reaction time of 60 minutes, an applied electric current of 3 Amps, and a filter bed height of 30 cm. Under these optimal conditions, the removal efficiency of chromium and cyanide was 92% and 88%, respectively. In this way, in the determined optimal conditions, the concentration of chromium and cyanide decreased from 13 and 0.908 mg/L to 1.56 and 0.72 mg/L, respectively. Discussion and Conclusion: Based on the standards provided by Iran's Environmental Protection Organization, treated wastewater has the ability to be discharged into the environment.

منابع و مأخذ:

1. Bird K, Boopathy R, Nathaniel R, LaFleur G. Water pollution and observation of acquired antibiotic resistance in Bayou Lafourche, a major drinking water source in Southeast Louisiana, USA. Environmental Science and Pollution Research. 2019:1-13.


2. Teng Q, Hu X-F, Luo F, Wang J, Zhang D-m. Promotion of rice–duck integrated farming in the water source areas of Shanghai: its positive effects on reducing agricultural diffuse pollution. Environmental Earth Sciences. 2019;78(5):171.


3. Rivas J, Gimeno O, Beltrán F. Wastewater recycling: Application of ozone based treatments to secondary effluents. Chemosphere. 2009;74(6):854-9.


4. Bernal-Martínez LA, Barrera-Díaz C, Solís-Morelos C, Natividad R. Synergy of electrochemical and ozonation processes in industrial wastewater treatment. Chemical Engineering Journal. 2010;165(1):71-7.


5. Suman Raj DS, Anjaneyulu Y. Evaluation of biokinetic parameters for pharmaceutical wastewaters using aerobic oxidation integrated with chemical treatment. Process Biochemistry. 2005; 40 (1) 165 – 75


6. Di M, Liu X, Wang W, Wang J. Manuscript prepared for submission to environmental toxicology and pharmacology pollution in drinking water source areas: Microplastics in the Danjiangkou Reservoir, China. Environmental toxicology and pharmacology. 2019; 65:82-9.


7. Bautista P, Mohedano A, Casas J, Zazo J, Rodriguez J. An overview of the application of Fenton oxidation to industrial wastewaters treatment. Journal of Chemical Technology and Biotechnology. 2008;83(10):1323-38.


8. Leven S. Creativity: reframed as a biological process. Brain and values: Psychology Press; 2018. p. 427-70.


9. Esplugas S, Bila DM, Krause LGT, Dezotti M. Ozonation and advanced oxidation technologies to remove endocrine disrupting chemicals (EDCs) and pharmaceuticals and personal care products (PPCPs) in water effluents. Journal of Hazardous Materials. 2007;149(3):631-42.


10. Burdon F, Munz N, Reyes M, Focks A, Joss A, Räsänen K, et al. Agriculture versus wastewater pollution as drivers of macroinvertebrate community structure in streams. Science of the Total Environment. 2019; 659:1256-65.


11. Antonie RL. Fixed biological surfaces-wastewater treatment: the rotating biological contactor: CRC press; 2018.


12. Feng Y, Yang S, Xia L, Wang Z, Suo N, Chen H, et al. In-situ ion exchange electrocatalysis biological coupling (i-IEEBC) for simultaneously enhanced degradation of organic pollutants and heavy metals in electroplating wastewater. Journal of hazardous materials. 2019; 364:562-70.


13. JONIDI JA, Golbaz S, REZAEI KR. Concurrent removal of cyanide and hexavalent chromium from aqueous solution by coagulation and flocculation processes. 2014.


14. Baral A, Engelken RD. Chromium-based regulations and greening in metal finishing industries in the USA. Environmental Science & Policy. 2002;5(2):121-33.


15. Asadollahfardi G, Zangooei H, Motamedi V, Davoodi MJAIER-AIJ. Selection of coagulant using jar test and analytic hierarchy process: A case study of Mazandaran textile wastewater. 2018;7(1):1-11.


16. Kabdaşlı I, Arslan-Alaton I, Ölmez-Hancı T, Tünay O. Electrocoagulation applications for industrial wastewaters: a critical review. Environmental Technology Reviews. 2012;1(1):2-45.


17. Tanneru CT, Chellam S. Mechanisms of virus control during iron electrocoagulation–Microfiltration of surface water. Water research. 2012;46(7):2111-20.


18. Harif T, Khai M, Adin A. Electrocoagulation versus chemical coagulation: coagulation/flocculation mechanisms and resulting floc characteristics. water research. 2012;46(10):3177-88.


19. Emamjomeh MM, Sivakumar M. Review of pollutants removed by electrocoagulation and electrocoagulation/flotation processes. Journal of Environmental Management. 2009;90(5):1663-79.


20. Malakootian M, Mansoorian H, Moosazadeh M. Performance evaluation of electrocoagulation process using iron-rod electrodes for removing hardness from drinking water. Desalination. 2010;255(1):67-71.


21. Mollah MYA, Schennach R, Parga JR, Cocke DL. Electrocoagulation (EC)—science and applications. Journal of hazardous materials. 2001; 84 (1) 29 - 41 .


22. Shin D, Shin W, Kim Y-H, Ho Han M, Choi S. Application of a combined process of moving-bed biofilm reactor (MBBR) and chemical coagulation for dyeing wastewater treatment. Water science and technology. 2006;54(9):181-9.


23. Baudequin C, Couallier E, Rakib M, Deguerry I, Severac R, Pabon M. Purification of firefighting water containing a fluorinated surfactant by reverse osmosis coupled to electrocoagulation–filtration. Separation and Purification Technology. 2011;76(3):275-82.


24. Babaee A, alavi Na, Jafarzadeh N. Engineering of Environmental chemistry. 2 ed. Tehran: Andisheh Rafie; 1389. p. 147.


25. Turan NG, Mesci B, Ozgonenel O. The use of artificial neural networks (ANN) for modeling of adsorption of Cu (II) from industrial leachate by pumice. Chemical Engineering Journal. 2011;171(3):1091-7


26. JONIDI JA, Golbaz S, REZAEI KR. Concurrent removal of cyanide and hexavalent chromium from aqueous solution by coagulation and flocculation processes. 2014.


27. Mahvi AH, Bazrafshan E. Removal of cadmium from industrial effluents by electrocoagulation process using aluminum electrodes. World Appl Sci J. 2007;2(1):34-9.


28. Feng J-w, Sun Y-b, Zheng Z, Zhang J-b, Shu L, Tian Y-c. Treatment of tannery wastewater by electrocoagulation. Journal of Environmental Sciences. 2007;19(12):1409-15.


29. Xiang DG. Electrocoagulation for varicose veins of the lower extremity [J]. JOURNAL OF BEIJING MEDICAL UNIVERSITY. 2000;2.


30. Zhang S, Zhang J, Wang W, Li F, Cheng X. Removal of phosphate from landscape water using an electrocoagulation process powered directly by photovoltaic solar modules. Solar Energy Materials and Solar Cells. 2013; 117:73-80.


31. Pi K-W, Xiao Q, Zhang H-Q, Xia M, Gerson AR. Decolorization of synthetic methyl orange wastewater by electrocoagulation with periodic reversal of electrodes and optimization by RSM. Process safety and environmental protection. 2014;92(6):796-806.

32. Tehran province, Mallard city, Safadasht, south side of Nabi Akram (pbuh) square, non-profit construction and maintenance institute of Safadasht non-governmental industrial town (http://safadashtiec.ir), (http://www.eiec.ir)

1. Ghodrati S, Moussavi G. The optimization of electrocoagulation process for treatment of the textile wastewater by Response Surface Methodology (RSM). Iranian Journal of Health and Environment. 2014;7(2):239-52.


2. Maryam.m, Bahram. A, ali. T, Investigate the importance of self-purification ability of rivers in the preparation of wastewater discharge standards


3. Liu W, Jin L, Xu J, Liu J, Li Y, Zhou P, et al. Insight into pH dependent Cr (VI) removal with magnetic Fe3S4. Chemical Engineering Journal. 2019; 359:564-71.


4. Zhao H, Liu H, Qu J. Effect of pH on the aluminum salts hydrolysis during coagulation process: Formation and decomposition of polymeric aluminum species. Journal of Colloid and Interface Science. 2009;330(1):105-12.


5. Lee S, Ihara M, Yamashita N, Tanaka H. Improvement of virus removal by pilot-scale coagulation-ultrafiltration process for wastewater reclamation: Effect of optimization of pH in secondary effluent. Water research. 2017; 114:23-30.


6. Hakizimana JN, Gourich B, Chafi M, Stiriba Y, Vial C, Drogui P, et al. Electrocoagulation process in water treatment: A review of electrocoagulation modeling approaches. Desalination. 2017; 404:1-21.


7. TAKDASTAN A, AZIMI A, SALARI Z. The use of electrocoagulation process for removal of turbidity, COD, detergent and phosphorus from carwash effluent. 2011.


8. Yavuz Y, Ögütveren Ü. Treatment of industrial estate wastewater by the application of electrocoagulation process using iron electrodes. Journal of environmental management. 2018; 207:151-8.


9. Mohammadi AS, Mehralipour J, Shabanlo A, Roshanaie G, Barafreshtepour M, Asgari G. Comparing the electrocoagulation and electro-Fenton processes for removing nitrate in aqueous solution for Fe electrodes. Journal of Mazandaran University of Medical Sciences. 2013;23(104).


10. Sharma A, Adapureddy SM, Goel S. Arsenic Removal from Aqueous Samples In Batch Electrocoagulation Studies. Int Proc Chem Biol Environ Eng. 2014; 64:40-3.


11. Oturan N, Wu J, Zhang H, Sharma VK, Oturan MA. Electrocatalytic destruction of the antibiotic tetracycline in aqueous medium by electrochemical advanced oxidation processes: effect of electrode materials. Applied Catalysis B: Environmental. 2013; 140:92-7.


12. Ensano BMB, Borea L, Naddeo V, Belgiorno V, de Luna MDG, Balakrishnan M, et al. Applicability of the electrocoagulation process in treating real municipal wastewater containing pharmaceutical active compounds. Journal of hazardous materials. 2019; 361:367-


13. Yildiz S, Oran E. Sewage sludge disintegration by electrocoagulation. International journal of environmental health research. 2019;29(5):531-43.