حذف نیترات از آب زیرزمینی با استفاده از ستون جاذب حاوی رزین Purolite A-400

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه گیلان

چکیده

طراحی مناسب و موفق یک ستون جاذب، مستلزم پیش­بینی تغییرات زمانی غلظت جریان خروجی یا همان منحنی رخنه است که با بهره­گیری از مدل­سازی فرایند جذب امکان­پذیر است. به این منظور، آزماییش­هایی­ با عبور جریان محلول­های استاندارد با غلظت 75 و 150 میلی­گرم در لیتر نیترات و آب آلوده­ی یکی از چاه­های استان گیلان از ستون جاذب حاوی رزین آنیونی Purolite A-400 انجام شد.  نمونه­برداری از آب خروجی ستون در زمان­های مختلف صورت گرفت و غلظت نیترات آن تعیین گردید. پس از انجام آزمایش­ها، ویژگی­های دینامیکی فرایند جذب با مدل­سازی منحنی­های رخنه و بهره­گیری از مدل­های توماس، بوهارت- آدامز، لین- وانگ و ولبورسکا بررسی گردید. مقایسه­ی مدل­های مذکور نشان داد که هرچند سه مدل اول به لحاظ ساختاری تفاوت داشته و پارامترهای هر یک اطلاعات مفیدی از فرایند جذب در اختیار قرار می­دهد، اما نتایج آنها بخوبی بر هم منطبق بوده و از این رو می­توان بر مبنای روابط بین آنها پارامترهای هر کدام را بدون نیاز به مدل­سازی مجدد، از پارامترهای دو مدل دیگر محاسبه نمود. مدل­ توماس و به تبع آن دو مدل دیگر در پیش­بینی منحنی­های رخنه آزمایش­ها از موفقیت بیشتری در مقایسه با مدل ولبورسکا برخوردار بوده و توانست در تمام مسیر فرایند با دقت بسیار خوبی غلظت نرمال شده­ی نیترات در جریان خروجی از ستون­ها را پیش­بینی کند. در آزمایش آب زیرزمینی آلوده در بخش­های انتهایی منحنی رخنه،  از  دقت  مدل توماس (و دو مدل دیگر) کاسته شده است که دلیل آن وجود یون­های سولفات و فسفات در آب ورودی بود. 

کلیدواژه‌ها

عنوان مقاله [English]

Nitrate Removal from Groundwater by Purolite A-400 Resin in a Fixed bed Column

نویسندگان [English]

  • SA Moussavi
  • H Asadi
چکیده [English]

Appropriate and successful design of an adsorbing column needs to predict dynamic changes in outflow concentration of the substance (i.e. breakthrough curve), which is possible by modeling of the adsorption process. In this study, dynamic experiments were carried out by passing two aqueous solutions of 75 and 150 mg-NO-3 L-1, and a polluted groundwater from Guilan province through a packed bed column of anionic resin, Purolite A-400. Outflow solution was sampled at different time intervals, and the samples were analyzed for nitrate concentration. Dynamic behavior of adsorption was evaluated by modeling of breakthrough curves using Thomas, Bohart-Adams, Lin-Wang and Wolborska models. Comparison and evaluation of the models showed that though the first three models were structurally different and their parameters provided useful information about adsorption process, the data simulated by them were almost the same, and thus parameters of each model could be predicted from the parameters of the two other models without refitting. The predicted curves by the models of Thomas, Bohart-Adams and Lin-Wang were in more agreement with the measured curves than the Wolborska model in all parts of the breakthrough curves, and the dynamic parameters of adsorption process were determined by them more accurately. In the experiment with the polluted groundwater, Thomas model (and other two similar models) deviated from the experimental data at the end of the adsorption process which seemed to be due to the presence of sulfate and phosphate ions in the inflow water. 

کلیدواژه‌ها [English]

  • Bed equivalent
  • Bed volume
  • Breakthrough point
  • Critical bed depth
  • Exhaustion point
  • Stoichiometric time

مراجع

بی­نام، 1388. آب آشامیدنی- ویژگی­های فیزیکی و شیمیایی. مؤسسه استاندارد و تحقیقات صنعتی ایران، استاندارد ملی ایران 1053، تجدید نظر پنجم.
موسوی س ع، اسدی ح و اسفندبد م، 1389. کارآیی فرایند تبادل یونی در حذف نیترات از آب 1- هم­دماهای تعادلی جذب نیترات توسط رزین Purolite A-400 مجله دانش آب و خاک، جلد 1/20، شماره 4. صفحه­های 185 تا 200.
Aksu Z and Gönen F, 2004. Biosorption of phenol by immobilized activated sludge in a continuous packed bed: prediction of breakthrough curves. Process Biochemistry 39: 599–613.
Ann M and Franson H, 1992. Standard Methods for the Examination of Water and Waste Water. 19th Edition. American Public Health Association.
Bae BU, Jung YH, Han WW  and Shin HS, 2002. Improved brine recycling during nitrate removal using ion exchange. Journal of Water Research 36: 3330-3340
Baral SS, Das N, Ramulu TS, Sahoo SK, Das SN and Chaudhury GR, 2009. Removal of Cr(VI) by thermally activated weed Salvinia cucullata in a fixed-bed column. Journal of Hazardous Materials 161: 1427–1435.
Bohart GS and Adams EQ, 1920. Some aspects of the behavior of charcoal with respect to chlorine. Journal of the American Chemical Society 42: 523–544.
Bolt GH, 1976. Adsorption of anions by soils Pp. 91-96. In: Bolt GH and Bruggenwert MGM (Eds). Soil Chemistry. A. Basic Elements. Elsevier scientific publishing company - Amsterdam.
Boumediene M and Achour D, 2004. Denitrification of the underground waters by specific resin exchange of ion. Desalination 168: 187-194.
Bouwer H, 1989. Agricultural contamination: problems and solutions. Water Environment and Technology 1: 292–297.
Chu KH, 2004. Improved fixed-bed models for metal biosorption. Chemical Engineering Journal 97: 233–239.
Clifford DA and Liu X, 1993. Ion exchange for nitrate removal. American Water Works Association 85(4): 135-143.
Coulson JM, Richardson JF, Backhurst JR and Harker JH,1991. Chemical Engineering, vol. 2, Particle Technology and Separation Processes. 4th ed. Butterworth-Heinemann,Bath, UK.
Anonymus, 1998. European Commission, Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption. Official Journal of the European Communities L 330: 32-54.
Anonyms, 2009. (United States Environmental Protection Agency), National primary drinking water regulations. EPA 816-F-09-004,May 2009. Available from http://water.epa.gov/ drink/contaminants/index.cfm.
Hamdaoui O, 2006. Dynamic sorption of methylene blue by cedar sawdust and crushed brick in fixed bed columns. Journal of Hazardous Materials B138: 293–303.
Hamdaoui O, 2009. Removal of copper(II) from aqueous phase by Purolite C100-MB cation exchange resin in fixed bed columns: Modeling. Journal of Hazardous Materials 161: 737–746.
Hutchins RA, 1973. New method simplifies design of activated carbon system. Chemical Engineering 80: 133-135.
Lacour S, Serpaud B and Bollinger JC, 2004. Performance of ion-exchanger grafted textiles for industrial water treatment in dynamic reactors. Water Research 38: 4045–4054
Lin SH and Wang CS, 2002.Treatment of high-strength phenolic wastewater by a new two-step method. Journal of Hazardous Materials B90: 205–216
Lin SH and Kiang CD, 2003. Chromic acid recovery from waste acid solution by an ion exchange process: equilibrium and column ion exchange modeling. Chemical Engineering Journal 92: 193–199
Lodeiro P, Herrero R, Sastre de Vicente ME, 2006 a. The use of protonated Sargassum muticum as biosorbent for cadmium removal in a fixed-bed column. Journal of Hazardous Materials B137: 244–253
Lodeiro P, Herrero R, Sastre de Vicente ME, 2006 b. Batch desorption studies and multiple sorption–regeneration cycles in a fixed-bed column for Cd(II) elimination by protonated Sargassum muticum. Journal of Hazardous Materials B137: 1649–1655
Malkoc E and Nuhoglu Y, 2006. Removal of Ni(II) ions from aqueous solutions using waste of tea factory: Adsorption on a fixed-bed column. Journal of Hazardous Materials B135: 328–336.
Mizuta K, Matsumoto T, Hatate Y, Nishihara K and Nakanishi T, 2004. Removal of nitrate-nitrogen from drinking water using bamboo powder charcoal. Bioresource Technology 95: 255–257.
Nash JE and Sutcliffe JV, 1970. River flow forecasting through conceptual models. Part I; A discussion of principles. Journal of Hydrology 10: 282-290.
Öztürk N and Ennil Bektas T, 2004. Nitrate removal from aqueous solution by adsorption onto various materials. Journal of Hazardous Materials 112: 155–162.
Paul Chen J, Yoon JT  and Yiacoumi S, 2003. Effects of chemical and physical properties of influent on copper sorption onto activated carbon fixed-bed columns. Carbon 41: 1635–1644
Ruthven DM, 1984. Principles of Adsorption and Adsorption Processes.Wiely, New York.
Samatya S, Kabay N, Yuksel U, Arda M and Yuksel M, 2006. Removal of nitrate from queous solution by nitrate selective ion exchange resins. Reactive & Functional Polymers 66: 1206-1214.
Thomas HC, 1948. Chromatography: A problem in kinetics, Annals of the New York Academy of Sciences 49: 161–182.
Tran HH and Roddick FA, 1999. Comparison of chromatography and desiccant silica gels for the adsorption of metal ions, II. Fixed-bed study. Water Research 33: 3001–3011.
Vijayaraghavan K, Jegan J, Palanivelu K and Velan M, 2005. Biosorption of copper, cobalt and nickel by marine green alga Ulva reticulata in a packed column. Chemosphere 60: 419–426.
Anonymus, 2008. Guidelines for drinking water quality. Recommendations, vol. 1, third edition, World Health Organization, Geneva.
Wolborska A, 1989. Adsorption on activated carbon of p-nitrophenol from aqueous solution. Water Research 23: 85–91.
Yan G and  Viraraghavan T, 2001. Heavy metal removal in a biosorption column by immobilized M. Rouxii biomass. Bioresource Technology 78:243–249.
Yoon YH and Nelson JH, 1984. Application of gas adsorption kinetics, I. A theoretical model for respirator cartridge service time. American Industrial Hygiene Association Journal 45: 509–516.
Zhou D, Zhang L, Zhou J and Guo S, 2004. Development of a fixed-bed column with cellulose/chitin beads to remove heavy-metal ions. Journal of Applied Polymer Science 94: 684–691.
 

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