Investigation on removal of p-nitrophenol using a hybridized photo-thermal activated persulfate process: Central composite design modeling |
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| Institution: | 1. Department of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, Tehran, Iran;2. Department of Applied Chemistry, Faculty of Science, Malayer University, Malayer, Iran;1. Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. School of Engineering and Information Technology, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia;1. Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City) , New Borg El-Arab City, P.O. Box 21934, Alexandria, Egypt;2. Electronic Materials Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O. Box 21934, Alexandria, Egypt;3. Materials Science Department, Institute of Graduate Studies and Research (IGSR), Alexandria University, 163 Horrya Avenue, P.O. Box 832, Shatby, 21526 Alexandria, Egypt;1. Hunan Provincial Communications Planning, Survey & Design Institute, Changsha, 410008, China;2. College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai, 201620, China;3. School of Civil and Architectural Engineering, Central South University, Changsha, 410075, China;1. Faculty of Caspian, College of Engineering, University of Tehran, Tehran, Iran;2. Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365/8486, Tehran, Iran;1. Environmental Engineering Department, KN Toosi University of Technology, Iran;2. Environmental Engineering Department, KN Toosi University of Technology, P.O. Box 1587-544-16, Tehran, Iran;3. University of Shahrood, Iran;1. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;2. Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626, Villeurbanne, France |
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| Abstract: | The aim of this work is the study of p-nitrophenol (PNP) removal, as a nitroaromatic compound, using a hybridized photo-thermally activated potassium persulfate (KPS) in a fully recycled batch reactor. Response surface method was used for modeling the process. Reaction temperature, KPS initial dosage and initial pH of the solution were selected as variables, besides PNP degradation efficiency was selected as the response. ANOVA analysis reveals that a second order polynomial model with F-value of 41.7, p-value of 0.0001 and regression coefficient of 0.95 is able to predict the response. Based on the model, the process optimum conditions were introduced as initial pH of 4.5, KPS]0 = 1452 mg/L and T = 66 °C. Also experiments showed that using thermolysis and photolysis of the persulfate simultaneously, the role of thermolysis is not considerable. A pseudo first order kinetic model was established to describe the degradation reaction. Operational cost, as a vital industrial criterion, was estimated so that the condition of initial pH of 4.5, KPS]0 = 1452 mg/L and T = 25 °C showed the highest cost effective case. Under the preferred mild condition, the process will reach to 84% and 89% of degradation and mineralization efficiencies, after 60 and 120 min, respectively. |
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| Keywords: | Nitroaromatic compounds Hybridized persulfate activation p-Nitrophenol removal Design of experiment Cost estimation Kinetic |
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