November 29, 2020
Mohammad Moradi

Mohammad Moradi

Academic rank: Assistant Professor
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Education: Ph.D in علوم پایه
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Faculty: science

Research

Title Performance and modeling of UV/persulfate/Ce(IV) process as a dual oxidant photochemical treatment system: Kinetic study and operating cost estimation
Type Article
Keywords
UV/persulfate Ce(IV) Degradation Operating cost Kinetic ANN
Journal CHEMICAL ENGINEERING JOURNAL
Researchers Ali Reza Soleymani، Mohammad Moradi

Abstract

A dual oxidant photochemical system, consist of persulfate (PS) and ceric (Ce(IV)) ions named as UV/PS/Ce(IV), was designed and examined for degradation of an organic pollutant, i.e., direct red 16 (DR16) in aqueous media. Using a recycled batch photo-reactor, the influence of the operational factors such as the initial pH and the PS or/and Ce(IV) to the DR16 initial molar ratios (oxidants:DR16 IMRs) were studied. The PS:Ce(IV):DR16 IMR was set 50:10:1 concerning the environmentally allowable total sulfate concentration (TSC) of 600 mg/L in the aqueous media. Under the mild operational conditions, i.e., natural initial pH and ambient temperature of 25 °C, the degradation efficiency of 30 mg/L of the DR16 after about 5.88 min, reached 90% with the operating cost of 1.98 US$/m3. Also, using the power law kinetic equation and artificial neural network (ANN) method, the photochemical process was simulated and modeled successfully. The relative importance order of the process operating factors were determined by the sensitivity analysis as: reaction time > Ce(IV):DR16 IMR > PS:DR16 IMR > initial pH.