بررسی راندمان حذف آلکیل بنزن سولفونات خطی (LAS) در برکه‌های تثبیت فاضلاب شهر یزد

نوع مقاله: مقاله پژوهشی

نویسندگان

1 عضو هیئت علمی گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی یزد

2 دانشیار گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی یزد

3 دانشجوی دکترای بهداشت محیط، دانشکده بهداشت، دانشگاه تربیت مدرس تهران

4 مدیر تصفیه‌‌خانه فاضلاب شهر یزد

5 کارشناس آزمایشگاه شیمی، دانشکده بهداشت، دانشگاه علوم پزشکی یزد

6 دانشجوی کارشناسی بهداشت محیط، دانشگاه علوم پزشکی یزد

چکیده

سورفاکتانت‌ها مواد شیمیایی آلی هستند که به‌مقدار زیادی در پاک‌کننده‌ها استفاده می‌شوند. در میان سورفاکتانت‌های آنیونی، آلکیل بنزن سولفونات خطی (LAS) بیشترین استفاده را دارد. تخلیه فاضلاب خام یا تصفیه شده به محیط، باعث بروز مشکلات زیست‌محیطی عمده‌ای می‌گردد. دراین مطالعه 64 نمونه فاضلاب به‌مدت یک‌سال برداشت شد و بر اساس روشهای استاندارد آنالیز گردید. بررسی نتایج حذف سورفاکتانت‌های آنیونی در برکه‌ها در فصول مختلف نشان داد که بیشترین راندمان حذف سورفاکتانت‌های آنیونی در فصل تابستان و در برکه اختیاری ثانویه و کمترین آن در پاییز و در برکه بیهوازی است. همچنین نتایج حاصله نشان ‌داد که براساس استاندارد محیط زیست، پساب خروجی از برکه‌های تثبیت شهر یزد برای تخلیه به آبهای سطحی، مصارف کشاورزی و تخلیه به چاه جاذب با 0/05 P value< دارای اختلاف معنی‌دار و بالاتر از حد مجاز است.

کلیدواژه‌ها


عنوان مقاله [English]

Removal Efficiency of Linear Alkyl Benzene Sulfonate (LAS) in Yazd Stabilization Pond

نویسندگان [English]

  • Asghar Ebrahimi 1
  • Mohammad Hasan Ehrampoosh 2
  • Mohammadreza Samaie 3
  • Seyed Vahid Ghelmani 4
  • Parvaneh Talebi 5
  • Majid Dehghan 6
  • Atefe Honardoost 6
  • Ebrahim Shahsavani 6
1 Faculty Member of Environmental Health, Faculty of Public Health, Yazd University of Medical Sciences, Yazd
2 Assoc. Prof. of Environmental Health, Faculty of Public Health., Yazd University of Medical Sciences, Yazd
3 Ph.D. Student of Environmental Health, Faculty of Public Health, Tarbiat Modares University, Tehran
4 Wastewater Treatment Plant Manager of Yazd
5 Chemistry Lab. Expert , Faculty of Public Health, Yazd University of Medical Sciences, Yazd
6 B. A. Student of Environmental Health, Faculty of Public Health, Yazd University of Medical Sciences, Yazd
چکیده [English]

Surfactants are organic chemicals with wide applications as detergents. Linear alkyl benzene sulfonate (LAS) is an anionic surfactant most commonly used. Discharge of raw or treated wastewater containing this chemical into the environment causes major public health problems. In this study, 64 samples were taken from the effluent of Yazd Wastewater  Treatment Plant over a period of one year. The samples were analyzed according to standard methods. The results obtained from the samples taken in different seasons showed that the highest efficiency of anionic surfactant removal was achieved in the summer in the secondary facultative stabilization pond. The least efficiency was observed in the autumn in samples from the anaerobic stabilization pond. It was also found that treated wastewater discharged into surface waters, reused for agricultural irrigation, or discharged into absorbent wells had significant differences with Pvalue<0.5and contained surfactant contents higher than those recommended by environmental standards in all cases.

کلیدواژه‌ها [English]

  • Stabilization pond
  • Alkyl benzene sulfonate (LAS)

1- Mozaheb, S. A., Fallahzadeh, M., Ghaneian, M. T., and Rahmani Shamsi, J. (2009). “Effect of organic load, pH and EC variations of raw wastewater and weather condition on the efficiency of Yazdstabilization ponds.” J. of Water and Wastewater, 70, 55-61. (In Persian)

2- Mahvi, A. H., Alavi Nakhjavan, N., and Naddafi, K. (2004). “A survey on detergent removal in Qods township wastewater treatment plant based on activated sludge method.” J. of Gonabad University of Medical Sciences, 10 (2), 35-42. (In Persian)

3- Guang Guo, Y. (2004). “Behavior and effects of surfactants and their degradation products in the environment.” International J. of Environment, 32, 417-431.

4- Imandel, K. (1989). A survay on detergent of linear and nonlinear alkyl benzene sulfonate in environmental,TehranUniversity. (In Persian)

5- Tchobanoglous, G., and Btron, F. (2004). Wastewater engineering, 4th  Ed., McGraw Hill, Metclf and Eddy Inc.,New York.

6- Perkowski, J., and Jozwiak, W. (2006). “Application of fentons, reagent in detergent separation in highly concentrated water solutions.” J. of Fibers and Textiles, 14(5), 59.

7- Kowalska, I.(2008). “Surfactant removal from water solutions by means of ultrafiltration and ion exchange.” Desalination, 221, 351-357.

8- Tadros ,T. H. (2005). Applied surfactants: Principles and application copyright, 1st Ed.,Wiley-VCH Verlag, Wienhiem.

9- Nori, G., and Shahriary, A. (2001). A survay of anionic detergent in environmental pollution, Islamic Azad University. (In Persian)

10- Roshani, B., Shahmansouri, M. R., and Mohamadi, A. (2003). “A survay of detergent wastewater treatment industry by coagulation process in laboratory scale.” J. of Shahid Sadoughi University of Medical Sciences, 13 (1), 62-65.

11-Mousavi, S. A., Mahvi, A. H., Mesdaghinia, A., Naseri, S., and Honari, H. R. (2010). “Fenton oxidation efficiency in removal of detergents from water.” J. of Water and Wastewater, 72, 16-23.

12- Salvato, J., Nemerow, N., and Agardy, F. (2003). Environmental engineering, 5th  Ed., John Wily Inc.,USA.

13- Sharvelle, S., Lattyak, R., and Banks, M. (2007). “Evaluation of biodegradability and biodegradation kinetics for anionic, nonionic, and amphoteric surfactants.” J. of water, Air and soil pollut., 183, 177-186.

14- Chunlong, Z. (2007). Fundamentals of environmental sampling and analysis, John Wiley & Sons, Inc.Hoboken, New Jersy.

15- Institute of standard and Industrial Research of Iran. (1996). Physical and chemical characteristics of drinking water, 5th Ed.,Tehran. (In Persian)

16- Management and Planning Organization (2000). The effect as a result of industrial and mining from the view point of statistics,Tehran.

17- Bitton, G. (2005). Wastewater microbiology, 3rd Ed., John Wiley and Sons Inc., New Jersy.

18- Mara, D. (1998). Guide for design of stabilization ponds in Iran, Water and Wastewater Eng. Co.,Tehran.

19-  Peng , J. F.,  Wang , B. Z., Song, Y., Yuan, P., and Liu, Z. (2007). “Adsorption and release of phosphorus in the surface sediment of a wastewater stabilization pond.” Eco . Eng., 31, 3192-3197.

 20- Martin, W., and Johannes, H. (1996).“Surface active agents and their influence on oxygen transfer.” Wastewater Technology, 34 (3), 249-256.