بررسی اثر عوامل محیطی و هیدرولیکی بر میزان حذف فسفر زهاب کشاورزی توسط سنگ آهک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی آب دانشکده علوم کشاورزی دانشگاه گیلان

2 هیات علمی / گروه مهندسی آب دانشکده علوم کشاورزی دانشگاه گیلان

3 هیات علمی/ گروه مهندسی آب دانشکده علوم کشاورزی دانشگاه گیلان

چکیده

با وجود افزایش جمعیت و حادتر شدن بحران کمبود آب در سال‌های اخیر، استفاده‌ مجدد از پساب‌ کشاورزی به عنوان یک راهکار مد نظر قرار‌ گرفته است. به دلیل وجود آلاینده‌های مختلف در پساب کشاورزی، توجه به مسائل زیست محیطی و اثر آن بر کیفیت محصولات اهمیت بسزایی دارد. فسفر یکی از آلاینده‌های پساب کشاورزی است که حد غیر مجاز آن باعث تخریب اکوسیستم آبزیان، کاهش کیفیت و خوراک‌وری منابع آبی می‌شود. در پژوهش حاضر، روند حذف فسفر توسط سنگ آهک و اثر برخی از عوامل مانند اندازه ذرات آهک، دما، pH بر میزان حذف فسفر و همچنین اثر هیدرولیک جریان بر ایزوترم جذب مورد بررسی قرار گرفت. در این راستا آزمایش‌های سینیتیک جذب سنگ آهک، استخراج ایزوترم جذب تحت معادله لانگمیر و فرندلیچ در مقیاس آزمایشگاهی و ساخت مدل فیزیکی کانال زهکش به منظور بررسی اثر هیدرولیک جریان بر ایزوترم جذب انجام شد. آزمایش سینتیک نشان داد که میزان حذف فسفر توسط سنگ آهک بعد از 30 ساعت ثابت شد. در دو اندازه سنگ آهک تفاوت معنی‌داری از نظر درصد حذف فسفر دیده نشد. تغییر pH از 2 به 6 منجر به کاهش درصد حذف فسفر گردید و افزایش آن از 6 تا 11 روند افزایشی درصد حذف را نشان داد. حد مطلوب pHبرای حذف فسفر برای سنگ آهک در حالت قلیایی به دست آمد. افزایش دما از 22 به 30 درجه سانتی‌گراد روند نزولی درصد حذف فسفر را در پی داشت به طوری‌که با هر یک درجه افزایش دما، حذف فسفر حدود 3 درصد کاهش یافت. بررسی ایزوترم، تطابق خوب معادله فرندلیچ را توسط سنگ آهک نشان داد. مقایسه آماری ایزوترم جذب و مدل فیزیکی، تفاوت معنی‌دار و بسنده نکردن به نتایج آزمایشگاهی را نشان داد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

investigating the effects of environmental and hydraulic factors on phosphorus removal of agricultural waste using limestone

نویسندگان [English]

  • Fereshteh Zadjanali choubari 1
  • Maryam Navabian 2
  • Majid Vazife doust 3
  • Mehdi Esmaeili Varaki 3
1
2
3
چکیده [English]

With regard to the increase in population rate and the acute water shortages within recent years, reuse of agricultural waste water has been considered as an approach to the solution. Phosphorus is one of the pollutants of the agricultural waste water, the too excess mount of which causes the degradation of aquatic ecosystems, reducing the quality of water resources and eutrophication.. In the present study, the trend of phosphorus removal through limestone and the effect of some such factors as particle size, temperature, and pH on phosphorus removal as well as the effect of hydraulics of flow on the adsorption isotherm were studied. In this respect, the absorption kinetics experiments on limestone mining Langmuir and Freundlich adsorption isotherm equation as based upon laboratory scale and physical model of drain channel were performed at the University of Guilan in dimensions of 15×15×200 cm to investigate the effect of hydraulic flow drainage in two rates (0.05-0.1 Lit/s) on the adsorption isotherm. Kinetic experiments indicated that the rate of phosphorus removal through limestone was fixed after 30 hours. Between two size-ranges of limestone (0.5-1 and 3-5 mm), there was no significant difference observed in the percentage of phosphorus removal. The changes of pH showed that rate of phosphorus removal decreases in pH ranging from 2 to 6 while it increased in the pH range from 6 to 11. The optimal pH for phosphorus removal through limestone was obtained in alkaline conditions. Increasing the temperature from 22 to 30°C was followed by a downward trend of phosphorus removal. With regard to isotherm experiments, the Freundlich equation, as through limestone, showed close agreement. Within the physical model of the drainage canal, lower flow rates; showed better results regarding the extent of phosphorus elimination. A statistical comparison of adsorption isotherm (under controlled conditions in laboratory) and the physical model of drainage canal, the experimental results showed a statistically significant level of phosphor us removal and while not being fully satisfied with this result when planning for the design of phosphor us removal basins .

کلیدواژه‌ها [English]

  • isotherm
  • Orthophosphate
  • pH
  • temperature
Abdul Wahab, M. I., Alsaqqar, A. S., Ali, S. K. (2011). Removal of phosphorus from wastewater by adsorption onto natural IRAGI materials, Journal of Engineering, 17(1): 395- 411.
Abedi M. J. and Najafi P. (2001). Using treated waste water in irrigationn, Iranian Irrigation and Drainage Committee Publishing. Tehran. (In Farsi).
Angel, R. (1999)," Removal of phosphate from sewage as amorphous calcium phosphate", Environ. Technology. 20 (7): 709–720.
APHA, A.W.W.A., WPCF. (2005). Standard methods for the examination of water and wastewater. (20th Ed). American Public Health Association, Washington DC.
Arias, C.A., Del Bubba, M., Brix, H.(. (2001). "Phosphorus removal by sands for use as media in subsurface flow constructed reed beds", Water ResResearcher, 35(5), 1159-1168.
Bastin, O., Janssens, F., Dufey, J., Peeter, A. (1999). Phosphorus removal by a synthetic iron oxide-gypsum compound, Ecology Engineering, 12, 339-351.
Brady, N.C., Weil, R.R. (1999). The nature and properties of soil, 12th edition, Prentice Hall Publications, New Jersey, NJ.
Bekta, N., Akbulut, H., Inan, H., Dimoglo, A. (2004). Removal of phosphate from aqueous solutions by electro coagulation, Journal of Hazardous Materials, 106:101-105.
Bellier, N., Chazarenc, F. and Comeau, Y. (2006). Phosphorus removal from wastewater by mineral apatite, Water Research, 40: 2965- 2971.
Chapra, SC. (1997). Surface water-quality modeling. Singapore, McGraw-Hill Inc.
Convery, J.J. (1970). Treatment techniques for removing phosphorus from municipal wastewaters, Water Pollution Control Research Series, EPA, Water Quality Office.
Davies, T.H., Cottingham, P.D. (1993). Phosphorus removal from wastewater in a constructed wetland, In Moshiri G.A. (eds), Constructed Wetlands for water quality improvement, Lewis Publishers, Boca Raton, Fl., p: 315-320.
Dahab, M.F., Vanier, S.M. (1998). Temperature effects on subsurface flow constructed wetlands, Wetlands Engineering River Restoration Conference, American Society of Civil Engineer.
De- Bashan, L. E. and Bashan, Y. (2004). Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997- 2003), Water Research, 38: 4222- 4246.
Drizo, A. (1998). Phosphate and ammonium removal from waste water, using constructed wetland systems, Ph.D. thesis, University of Edinburgh.
Environmental Protection Agency (1976). Process design manual for phosphorus removal, US EPA Proceedings 625/1-76-001a.
Garcia, J., Aguirre, P., Mujeriego, R., Huang, Y., Ortiz, L., Bayona, J. (2004). Initial contaminant removal performance factors in horizontal flow reed beds used for treating urban wastewater, Water Research, 38 (7), p: 1669-1678.
Gray, C.A., Schwab, A.P. (1993). Phosphorus fixing ability of high pH, high calcium, coal-combustion, waste materials, Water, Air, & Soil Pollution, 69 (3-4): 309-320.
Hasanoghli A., Liaghat A, Mirabzadeh M. (2002). Soil organic matter changes cause by irrigation with waste water and its remediation. Journal of Water and Waste Water. 42: 2-11. (In Farsi)
Hoffman, D., Srinivasan R. and Wolfe, J. (2007). Demonstration of an above-ground permeable reactive barrier system for removing nutrients from rainfall runoff in the North Bosque River watershed, Texas Agricultural Experiment Station / Blackland Research and Extension Center, 720 East Blackland Road, Temple, Texas 76502.
Jenssen, P.D., Maehlum, T., Krogstad, T. (1993). Potential use of constructed wetlands for wastewater treatment in northern environments, Water Science and Technology, 28(10): 149-157.
Jenkins, D., Ferguson, J.F and Menar, A.B. (1971). Chemical process for phosphate removal. Water Research. 5: 369-389.
JICA. (2005). The study on integrated management for ecosystem conservation of the Anzali wetland in Islamic Republic of Iran. Final report, Volume I: EXECUTIVE SUMMARY.
Johansson, L. (1999). Industrial by-products and natural substrata as phosphorus sorbents, Environmental Technology. 20: 309–316.
Johansson Westholm, L. (2006). Substrates for phosphorus removal- potential benefits for on-site wastewater treatment, Water Researcher. 40: 23–36.
Kadlec, R. H., Knight. L. (1996). Treatment Wetlands, Lewis Publishers, Boca Raton, FL.
Metcalf and Eddy Inc. (2003). Wastewater engineering: treatment, Disposal and Reuse, 4th ed., McGraw-Hill Co., New York.
Molle, A., Lienard, A., Grasmick, A., Iwema, A., Kabbabi, A. (2003). Phosphorus retention in subsurface constructed wetlands: Investigations focused on calcareous materials and their chemical reactions, Water Science and Technology,  48, 48(5): 75-83.
Nair, P.S., Logan, T.J., Sharpley, A.N., Sommers, L.E, Tabatabai, M.A., and Yuan, T.L. 1984. Inter laboratory comparison of a standardized phosphorus adsorption procedure. J. Environment. Quality., 13, 591±595.
Onyango, m. S., M. Masukume, A. Ochieng and F. Otieno. 2010. Functionalized natural zeolite and its potential for treating drinking water containing excess amount of nitrate. Water SA. 36( 5(5). Revised form 3 September 2010. Available on website http://www.wrc.org.za
Opoku, b. (2007). Suitability of different reactive filter media for onsite wastewater treatment. TRITA Water Research, 40: 2965- 2971.
Park, J. K., Wang, J., Novotny, G. (1997). Wastewater characterization for evaluation of biological phosphorus removal. Final report, WI: Department of Natural Resources, Aug, Report No.: 174
Reed, S.C., Brown, D.S. (1995). Subsurface flow wetlands – A performance evaluation, Water Environment Research,  67, 67 (2): 244-248.
Sabir, H., Hamidi, A.A., Mohamed, H.I., Faridah, A.H., Mohd, N.A. (2006). Domestic Wastewater Nutrients Removal Using GAC and Limestone by Physico-Chemical Treatment, In: Asia Water Conference,,  The Malaysian Water Association, March, Kuala Lumpur, Malaysia.
Sabir, H., Hamidi, A.A., Mohamed, H.I., Anees, A., John Van, L., Linda, Z., Simon, B., Muhammad, U. (2011). Orthophosphate removal from domestic wastewater using limestone and granular activated carbon, Desalination. 271: 265–272
Sakadevan, K., Bavor, H. (1998). Phosphate adsorption characteristics of soils, slugs and Zeolites to be used as substrates in constructed wetland systems. Water Researcher., 22 (2): 393–399.
Seo, D.C., Cho, J.S., Lee, H.J., Heo, J.S. (2005). Phosphorus retention capacity of filter media for estimating the longevity of constructed wetland, Water Research, 39(11): 2445-2457.
Shilton, A.N., Elmetri, I., Drizo, A., Pratt, S., Haverkamp, R.G., Bilby, S.C. (2006). Phosphorus removal by an ‘active’ slag filter: a decade of full scale experience, Water Research, 40(1): 113-118.
Tavakoli M. and Tabatabaei, M. (1999). Irrigation with treated waste water, Technical workshop of environmental view of wast water usage, 11 Nov. Tehran. PP 1-26. (In Farsi)
Takdastan, A., Jaafarzadeh, N., Hormozi Nejad, M., AhmadiMogadam, M., Mengeli Zadeh, N. (2012). Comparison of Lime and Bentonite Efficiency in Orthophosphate Removal from Influent of Secondary Clarifier in West Wastewater Treatment Plant of Ahvaz. Journal of Health. Number 1. P: 68-76. (In Farsi)
Vassos, T.D. (1987). The influence of low temperature on biological phosphorus removal at Kelowna Canada. Proc.of IAWPRC Specialized Conference. Biological Phosphate Removal from Wastewaters, p: 343-347.
Vohla, Ch., Margit, K., Bavor, H. J., Chazarenc, F., Mander, U. (2011). Filter materials for phosphorus removal from wastewater in treatment wetlands-A review, Ecological Engineering. 37: 70–89
Vollenweider, R.A. (1968). The scientific basis of lake and stream eutrophication with particular reference to phosphorus and nitrogen as eutrophication factors, Technical Report OECD, DAS/C81/68, Paris, France.
Wiechers, H.N.S and Vuuren van, L.R.J. (1979). A review of applied technology for nutrient removal from municipal effluents, Proceedings of Technology Transfer Seminar Nutrient removal from municipal effluents, Pretoria, South Africa.
 Zadjanali Chobari, F., Navabian, M. ,Esmaeili varaki, M. and Vazifehdost, M. (2012). The efficiency of limestone in the phosphorus removal from surface waters resources, 6 th National Conference and Exhibition of Environmental Engineering. 27 Dec. University of Tehran. (In Farsi)
Zhao, Y., Wang, J., Luan, Z., Peng, X., Liang, Z., Shi, L. (2009), Removal of phosphate from aqueous solution by red mud using a factorial design. Journal of Hazardous Materials,165: 1193-99.
Zhu, T., Jenssen, P.D., Maehlum, T.and Krogstad, T. (1997). Phosphorus sorption and chemical characteristics of lightweight aggregates (LWA): potential media in treatment wetlands, Water Science. Technol. 35(5): 103- 108.
Zhu, T., Maehlum, T., Jenssen, P.D., Krogstad, T. (2003). Phosphorus sorption characteristics of a lightweight aggregate, Water Science and Technology, 48(5): 93-100.