نوع مقاله : مقاله پژوهشی
نویسندگان
ارگان اصلی مواد، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، صندوق پستی: 51113-14399، تهران- ایران
چکیده
پاک‌سازی سازه‌های آلوده به مواد پرتوزا یکی از مهم‌ترین حوزه‌های شیمی محیط زیست است. در این پژوهش، پوشش پلیمری جداشونده حاوی شناساگر Br-PADAP جهت شناسایی و حذف آلاینده حاوی نیترات اورانیل شش آبه ساخته شد. در این بررسی برای اولین بار اثر pH بررسی شد. هم‌چنین پارامترهای زمینه‌های مختلف، غلظت آشکارساز، دمای خشک شدن آلاینده، دمای خشک شدن پوشش، و خصوصیات مکانیکی روی جذب آلاینده مورد بررسی قرار گرفت. نتایج ارزیابی‌های FT-IR، TGA و سنتیلاسیون مایع، حضور یون اورانیم در پوشش را اثبات کرد. پوشش پلیمری حاوی Br-PADAP و EDTA با جذب آلاینده از رنگ صورتی به رنگ قهوه‌ای تغییر می‌کند که ارزیابی کمی انجام شده براساس روش‌های پردازش تصویر با استفاده از نرم‌افزار MATLAB این تغییر رنگ را نشان داد. نتایج اندازه‌گیری‌های سنتیلاسیون مایع نشان می‌دهد که فاکتور آلاینده‌زدایی در این پوشش، در ppm 2000 بالای 97% است که بالاتر از مطالعات قبلی می‌باشد. در این مطالعه محلول پلیمری با فرمولاسیون بهینه و فیلم منعطف به‌دست آمد.
کلیدواژه‌ها
عنوان مقاله [English]
Fabrication of intelligent polymeric coating for uranium nuclear decontamination
نویسندگان [English]
- S. Kholghi
- M. Torab Mostaedi
- H. Foratirad
Leading Material Organization, Nuclear Science and Technology Research Institute, AEOI, P.O.Box:14399-51113, Tehran-Iran
چکیده [English]
The decontamination of structures with radioactive substances is one of the most important areas of environmental chemistry. In this study, an intelligent polymeric coating containing a Br-PADAP detector was made to identify and remove the uranyl nitrate contaminant (UO2(NO3)2.6H2O). In this study, the effect of pH was investigated for the first time. Also, the parameters of different substrates, detector concentration, contaminant drying temperature, coating drying temperature, and mechanical properties of the contaminant adsorption were investigated. The results of an evaluation of FT-IR, TGA, and liquid scintillation tests well prove the presence of uranium ions in the coating. The polymer coating containing the EDTA and Br-PADAP detector becomes purple to brown by absorbing a contaminant solution containing uranium ions. Quantitative evaluation based on MATLAB software image processing methods also shows a color change. Decontamination factors (DFs) in this coating were shown to be above 97% at 2000 ppm, and higher than in previous studies. The polymer solution was obtained with optimal formulation and flexible film.
کلیدواژه‌ها [English]
- Detachable polymer coating
- Nuclear contaminants
- pH
- Uranyl nitrate
- Detector
- J. Wang, et al, Research on nuclear emergency decontamination technology based on strippable coating, J. Radioanal. Nucl. Chem., 322, 1049 (2019).
- H.N. Gray, et al, Smart polymeric coatings for surface decontamination, Ind. Eng. Chem. Res., 40, 3540 (2001).
- H.M. Yang, C.W. Park, K.W. Lee, Polymeric coatings for surface decontamination and ecofriendly volume reduction of radioactive waste after use, Prog. Nucl. Energy., 104, 67 (2018).
- N. Jain, V.K. Singh, S. Chauhan, A review on mechanical and water absorption properties of polyvinyl alcohol based composites/films, J. Mech. Behav. Mater., 26, 213 (2017).
- L. Peponi, et al, Smart Polymers, in: Modif. Polym. Prop., Elsevier Inc., 131–154 (2017).
- A. Reena, et al, Synthesis and characterization of cross-linked hydrogels using polyvinyl alcohol and polyvinyl pyrrolidone and their blend for water shut-off treatments, J. Mol. Liq., 301, 112472 (2020).
- J. Xu, et al, AgNps-PVA–coated woven cotton fabric: Preparation, water repellency, shielding properties and antibacterial activity, J. Ind. Text., 48, 1545 (2019).
- L. Hu, Br-PADAP embedded in cellulose acetate electrospun nanofibers: Colorimetric sensor strips for visual uranyl recognition, J. Hazard. Mater., 329, 205 (2017).
- N.A. Betti, Thermogravimetric Analysis on PVA / PVP Blend Under Air Atmosphere, Eng. Technol. J., 34, 2433 (2016).
- E.M. Abdelrazek, et al, Structural, optical, thermal and electrical studies on PVA/PVP blends filled with lithium bromide, Curr. Appl. Phys., 10, 607 (2010).
- S. Francis, L. Varshney, Studies on radiation synthesis of PVA/EDTA hydrogels, Radiat. Phys. Chem., 74, 310 (2005).
- S.A. Kulyukhin, A.N. Kamenskaya, V.A. Lavrikov, Mechanism of UO2(NO3)2•6H2O decomposition under the action of microwave radiation, Radiochemistry., 51, 262 (2009).
- S. Bordère, et al, Obtaining a divided uranium oxide from the thermolysis of UO2(NO3)2·6H2O: outstanding role of the residual pressure, Solid State Ionics., 229, 63–65 (1993).
- S.A. Kulyukhin, A.N. Kamenskaya, I.A. Rumer, Mechanism of UO2(NO3)2•6H2O decomposition under the action of microwave radiation: Part 2, Radiochemistry., 51, 469 (2009).
- A.R. Polu, R. Kumar, H.W. Rhee, Magnesium ion conducting solid polymer blend electrolyte based on biodegradable polymers and application in solid-state batteries, Ionics (Kiel)., 21, 125 (2015).
- R. Khamirchi, et al, Adsorption property of Br-PADAP-impregnated multiwall carbon nanotubes towards uranium and its performance in the selective separation and determination of uranium in different environmental samples, Ecotoxicol. Environ. Saf., 150, 136 (2018).
- N. Jaipakdee, T. Pongjanyakul, E. Limpongsa, Preparation and characterization of poly (vinyl alcohol)-poly (vinyl pyrrolidone) mucoadhesive buccal patches for delivery of lidocaine HCL, Int. J. Appl. Pharm., 10, 115 (2018).
- B.B. Kalekar, et al, Thermal and X-ray diffraction studies on the phase equilibria in the system UO2(NO3)2.6H2O-NaNO3, J. Nucl. Mater., 279, 245 (2000).
- A.M. Deane, The infra-red spectra and structures of some hydrated uranium trioxides and ammonium diuranates, J. Inorg. Nucl. Chem., 21, 238 (1961).
- S. Su, Enhancing adsorption of U(VI) onto EDTA modified L. cylindrica using epichlorohydrin and ethylenediamine as a bridge, Sci. Rep., 7, 1 (2017).
- M. Wiśniewska, Temperature effects on the adsorption of polyvinyl alcohol on silica, Cent. Eur. J. Chem., 10, 1236 (2012).
- V. Pershin, Effect of substrate temperature on adhesion strength of plasma-sprayed nickel coatings, J. Therm. Spray Technol., 12, 370 (2003).
- W.B. Chu, The effects of pH, molecular weight and degree of hydrolysis of poly(vinyl alcohol) on slot die coating of PVA suspensions of TiO2 and SiO2, Colloids Surfaces A Physicochem. Eng. Asp., 302, 1 (2007).
- R. Sydansk, A Newly Developed Chromium (III) Gel Technology (SPE-19308-PA), SPE Reserv. Eng., 346 (1990).
- Z. Ali Lashari, Macro-rheology and micro-rheological study of composite polymer gel at high salinity and acidic conditions for CO2 shut off treatment in harsh reservoirs for improving oil recovery, Soc. Pet. Eng. - SPE/PAPG Pakistan Sect. Annu. Tech. Symp. Exhib. 2019, PATS 2019. (2019).
- D. Pulpea, Decontamination of radioactive hazardous materials by using novel biodegradable strippable coatings and new generation complexing agents, Chemosphere., 258, 127227 (2020).
)