حذف پارانیتروفنل از محیط‌های آبی توسط فرایند -UV/S2O82 در یک فتوراکتور پیوسته: بهینه‌سازی به روش طراحی آزمایش تاگوچی
محورهای موضوعی : مطالعات آزمایشگاهی و میدانی در مورد اصلاح/کاهش آلودگی محیطی از طریق تکنیک های نوظهور
سیدحامد ظفری
1
(گروه شیمی کاربردی، دانشکده شیمی، دانشگاه سمنان، سمنان، ایران)
کلید واژه: فتوراكتور جريان پيوسته آنولار, پارانيتروفنل, طراحی تاگوچي, -UV/S2O82 ,
چکیده مقاله :
در اين کار تحقيقی حذف يك آلايندة آلی تحت عنوان پارانيتروفنل (PNP) با استفاده از فرآيند UV/S2O82-در يك فتوراكتور پيوسته آنولار مورد بررسی قرار گرفته و شرایط عملیاتی موثر در کارآیی فرایند به روش تاگوچی بهینه‌سازی شده است. با توجه به نتايج طراحي آزمايش به روش تاگوچي، شرايط بهينه برای غلظت اوليه PNP برابر با mg L-1 40، برای pH برابر با 3، براي غلظت S2O82- برابر با mM 18 و براي زمان اقامت برابر با min 24/17 مي‌باشد. در اين شرايط مقدار درصد حذف برابر با %98 مي‌باشد كه با مقدار تجربي آن يعني %95 مطابقت خوبي دارد. همچنین روش تاگوچی مؤثرترين پارامتر در حذف PNP را غلظت -S2O82 با سهم %43 نشان مي‌دهد.
The present research was an attempt to investigate the removal of an organic pollutant called p-nitrophenol (PNP) using the UV/S2O82- process in a continuous annular photoreactor in order to optimize the operating conditions effective in the efficiency of the process through the Taguchi method. According to the results of the Taguchi method, the optimal conditions for initial concentration of PNP was equal to 40 mg L-1 with pH equal to 3 and S2O82- concentration equal to 18 mM in a residence time of 17.24 min. In such conditions, the removal percentage is equal to 98%, which is in good agreement with its experimental value of 95%. Furthermore, the Taguchi method showed that the most effective parameter in the removal of PNP was the concentration of S2O82- with a contribution of 43%.
[1] Holt, P.K., Borton, G.W., Mitchell, C.A., 2005, The future for electrocoagulation as a localized water treatment technology, Chemosphere, 59, 355.
[2] Mollah, M.Y.A., Morkovshy, P., Gomes, J.A.G., Kesmez, M., Paga, J., Cocke, D.L., 2004, Fundamentals, present and future persectives of electrocoagulation, Journal of Hazardous Materials, 114, 199.
[3] Behnajady, M.A., Modirshala, N., Daneshvar, N., Rabbani. M., 2007, Photocatalytic degradation of an azo dye in a tubular continuous-flow photoreactor with immobilized TiO2 on glass plates, Chemical Engineering Journal, 127, 167.
[4] De, A.K., Bhattacharjee, S. Dutta, B.K., 1997, Kinetics of phenol photooxidation by hydrogen peroxide and ultraviolet radiation, Industrial & Engineering Chemistry Research, 36, 3607.
[5] Galindo, C. Kalt, A., 1998, UV-H2O2 Oxidation of monoazo dyes in aqueous media: a kinetic study, Dyes and Pigments, 40, 27.
[6] Legrini, O., Oliveros, E., Braun, A.M, 1993, Photochemical processes for water treatment, Chemical Reviews, 93, 671.
[7] Ding, X., Gutierrez, L., Croue, J.-P., Li, M., Wang, L., Wang, Y., 2020, Hydroxyl and sulfate radical-based oxidation of RhB dye in UV/H2O2 and UV/persulfate systems: Kinetics, mechanisms, and comparison, Chemosphere, 253, 126655.
[8] Chen, L., Cai, T., Cheng, C., Xiong, Z., Ding, D., 2018, Degradation of acetamiprid in UV/H2O2 and UV/persulfate systems: A comparative study, Chemical Engineering Journal, 351, 1137.
[9] Liu, X., Liu, Y., Lu, S., Wang, Z., Wang, Y., Zhang, G., Guo, X., Guo, W., Zhang, T., Xi, B., 2020, Degradation difference of ofloxacin and levofloxacin by UV/H2O2 and UV/PS (persulfate): Efficiency, factors and mechanism, Chemical Engineering Journal, 385, 123987.
[10] Lee, Y.-M., Lee, G., Zoh, K.-D., 2021, Benzophenone-3 degradation via UV/H2O2 and UV/persulfate reactions, Journal of Hazardous Materials, 403, 123591.
[11] Ramakrishnan, R.K., Venkateshaiah, A., Grübel, K., Kudlek, E., Silvestri, D., Padil, V.V.T., Ghanbari, F., Černík, M., Wacławek, S., 2023, UV-activated persulfates oxidation of anthraquinone dye: Kinetics and ecotoxicological assessment, Environmental Research, 229, 115910.
[12] Wei-Po Lai, W., Lin, J.-C., Li, M.-H., 2023, Degradation of benzothiazole by the UV/persulfate process: Degradation kinetics, mechanism and toxicity, Journal of Photochemistry and Photobiology A: Chemistry, 436, 114355.
[13] Uwayezu, J.N., Carabante, I., Van Hees, P., Karlsson, P., Kumpiene, J., 2023, Validation of UV/persulfate as a PFAS treatment of industrial wastewater and environmental samples, Journal of Water Process Engineering, 53, 103614.
[14] Wang, Y., Zhou, J., Bi, W., Qin, J., Wang, G., Wang, Z., Fu, P., Liu, F., 2022, Schwertmannite catalyze persulfate to remove oxytetracycline from wastewater under solar light or UV-254, Journal of Cleaner Production, 364, 132572.
[15] Wang, M., Wang, Q., Cai, Y., Yuan, R., Wang, F., Qian, Y., Chen, Z., Zhou, B., Chen, H., 2021, Efficient degradation and defluorination of perfluorobutyric acid under UV irradiation in the presence of persulfate, Journal of Cleaner Production, 327, 129472.
[16] Fang, Z., Huang, R., Chelme-Ayala, P., Shi, Q., Xu, C., Gamal El-Din, M., 2019, Comparison of UV/Persulfate and UV/H2O2 for the removal of naphthenic acids and acute toxicity towards Vibrio fischeri from petroleum production process water, Science of The Total Environment, 694, 133686.
[17] Sun, J.H., Sun, S.P., Fan, M.H., Guo, H.Q., Lee, Y.F., Sun, R.X., 2008, Oxidative decomposition of p-nitroaniline in water by solar photo-Fenton advanced oxidation process, Journal of Hazardous Materials, 153, 187.
