ارزیابی و مقایسه عملکرد کربن فعال گرانول برای حذف MTBE از آب چاه‌های آلوده با دو روش آزمایشگاهی RSSCT و نیمه صنعتی

نوع مقاله: مقاله پژوهشی

چکیده

مصرف روز افزون MTBE به‌عنوان بالا برنده عدد اکتان بنزین می‌تواند یکی از عوامل آلودگی آب‌های زیرزمینی (با توجه به حلالیت زیاد آن در آب) باشد. حمل و نقل، شکستگی خطوط لوله انتقال بنزین و ریختن بنزین در جایگاه‌های توزیع سبب نشت این ماده می‌شود. غلظت MTBE در آب چاه مورد نظر ppb 50 بوده است. تصفیه این آب با فرایند جذب کربن فعال گرانول F-600 filtrasorb، که  مکان‌های جذب پر انرژی دارد، با دو روشRSSCT  و مطالعه پایلوتی مطالعه و مقایسه شده است. سیستم RSSCT طوری طراحی شده که مقدار 10min=اEBCTرا در مقیاس پایلوتی مشابه‌سازی کند. مطابق نتایج، زمان عملکرد محاسبه شده با روش RSSCT با مقدار عملی آن در مطالعات پایلوتی کاملاً مشابه است.
 

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Granular Activated Carbon Performance on MTBE Removal from Polluted Well Water by both RSSCT and Pilot Plant Methods

چکیده [English]

Oxygenated additive (MTBE) widely used as octane enhancer of gasoline. Due to high water solubility of MTBE (50 gr/l), it can pollute ground waters as a result of production, storage, leakages of oxygenated gasoline from pipelines cracking, underground storage tanks in gas stations, transportation and distribution of MTBE. These items are major source of pollution of ground waters. MTBE concentration in a given well was considered 50 ppb. Treating this water with adsorption process on granular activated carbon filtrasorb (F-600) that has high-energy sites was studied by RSSCT and pilot plant methods and their results were compared. RSSCT system was designed to simulate pilot plant scale at EBCT=10 min. According to the results, breakthrough time calculated by RSSCT method was completely similar to operational value in pilot plant study.
 

کلیدواژه‌ها [English]

  • Granulated Activated Carbon
  • Adsorption Process
  • Pilot Study
  • Breakthrough Point

[1] Keller A.A., Sandall O.C., Rinker R.G. & etal. “Health and environment assessment of MTBE, risk assessment, explore assessment, water treatment and cost benefit analysis”, Report to Governor and legislature of the state of California as sponsored by SB 221, Vol. 5, pp. 1-35, 1998.

[2] Lington A.R., Chemical industry statistical handbook:Chemical manufacturers Association, VA. USA, 1999.

[3] Stocking A., Suffet I.H., MC Guire M.J. & Karanaugh M. “Implication of MTBE consumer threshold odor study for drinking water standard setting”, Am. water works Assoc., Vol. 93, No.3, pp. 95-105, 2001.

[4] Shih T., Khan E., Rong W., Wangpaichitr M., Kong J. & Suffet I.H. “Sorption for removing MTBE from drinking water”, American water works Association National Conference Proceeding, Chicago. IL, June 1999.

[5] Sevilla A., Beaver P. & Cherry P. “Effect of MTBE on the treatability of petroleum hydrocarbons in water”, 21th National Meeting of the American Chemical Society, Division of Environmental Chemistry, Vol. 37, No.1, pp.407-09, 1994.

[6] Crittenden J.C. & etal. “Design consideration for GAC treatment of organic chemicals”, J. Am. water works   Assoc., Vol. 79, No. 1, pp. 74-81,1987.

[7] Suffet I.H. & wable O. “Removal of taste and odor compounds by activated carbon, Advances in Taste-and- odor treatment and control denver”, American water works research foundation, pp. 151-200, 1995.

[8] Crittenden J.C. & etal. “Prediction of GAC performance using rapid small-scale column test. Denver”, American water works association, 1989.

[9] Hand D.W. & etal. “Design of fixed bed adsorbers to remove multicomponent mixtures of volatile and synthetic organic chemicals”, J. Am. water works Assoc., vol. 81, No. 1, pp. 67-77, 1989.

[10] lagreg M.D., Buckingham P.L. & Evans J.C., Hazardous waste management, 1994.

[11] Sutherland J., Adams C. & Kekobad J. “Treatment of MTBE by air striping, carbon adsorption and advanced oxidation: Technical and economic comparison for five groundwaters”, water research, Vol. 38, pp. 193-205, 2004.

[12] Eckenfelder W.W., Industrial water pollution control, McGraw-Hill, 1989.

[13] Bale J., Brandewie C., Epoch M. & Half T. “Arsenic treatment for small domestic water system”, The Ohio state university, Environment Engineering Design Team.

[14] Sutherland J., Adams C. & Kekobad J. “Treatment of MTBE by air Striping, Carbon adsorption and advanced oxidation: Technical and economic comparison for five ground waters”, Water research, Vol. 38, pp. 193-205, 2004.

[15] Shih T.C., Wangpaichitr M. & Suffet M. “Evaluation of granular activated carbon technology for the removal of methyl tertiary butyl ether (MTBE) from drinking water”, Water research, Vol. 37, pp. 375-385, 2003.