Papers by shohreh mohammadi
Arabian Journal of Chemistry, 2021
Abstract Anolyte solution produced by membrane electrolysis of NaCl solution contains a high leve... more Abstract Anolyte solution produced by membrane electrolysis of NaCl solution contains a high level of available chlorine content (ACC) and other oxidizing compounds, rendering this solution a strong disinfectant property. In this paper, some process parameters affecting the anolyte production efficiency, such as total inlet flow (240–320 L/h), saline solution concentration (1.65–3.50 g/L), and the type of membrane (cation exchange, anion exchange, and bipolar membranes) were investigated in an electrolysis cell. Changes in the quality of anolytes produced at three initial concentrations of very high (ACC1 = 816.5 mg/L), relatively high (ACC2 = 461.5 mg/L), and medium (ACC3 = 355.0 mg/L) during storage (from the production up to 20 weeks) were examined by adjusting the total inlet flow, saline concentrations, and membrane types. Changes in the ACC of the produced anolyte solution were generally affected by the type of membrane used in the electrolysis cell. The use of anion exchange membrane resulted in the lowest durability of anolyte quality (60–80% ACC reduction after 4 weeks of storage) and the cation exchange membrane had the highest durability (less than 40% decrease after 4 weeks of storage). In addition, changes in the pH and the oxidation–reduction potential of the anolyte were investigated during the storage period, which had a different trend depending on the type of applied membrane.
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Desalination and water treatment
Publication details, including instructions for authors and subscription information: In this pap... more Publication details, including instructions for authors and subscription information: In this paper, an efficient method for phenol removal from wastewaters by a combination of UV degradation and rejection by a low-pressure reverse osmosis membrane system has been presented. The results showed that phenol removal by the UV/RO hybrid system is more efficient than by individual UV degradation or rejection by RO system. In order to compare the efficiencies of the individual and hybrid systems, a multipurpose experimental setup was assembled, and phenol removal by UV degradation and rejection by RO and UV/RO hybrid systems was examined. In degradation of phenol by UV system, phenol solutions with constant concentration and various pH values (3, 5, 7, and 9) were examined. The results showed that the highest degradation efficiency was obtained at pH = 5 using a single 6 W UV system. The removal of phenol by the RO membrane at various pH (3, 5, and 7) at two different feed pressures (50, ...
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Desalination and Water Treatment, 2014
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In this paper, an efficient method for phenol removal from wastewaters by a combination of UV deg... more In this paper, an efficient method for phenol removal from wastewaters by a combination of UV degradation and rejection by a low-pressure reverse osmosis membrane system has been presented. The results showed that phenol removal by the UV/RO hybrid system is more efficient than by individual UV degradation or rejection by RO system. In order to compare the efficiencies of the individual and hybrid systems, a multipurpose experimental setup was assembled, and phenol removal by UV degradation and rejection by RO and UV/RO hybrid systems was examined. In degradation of phenol by UV system, phenol solutions with constant concentration and various pH values (3, 5, 7, and 9) were examined. The results showed that the highest degradation efficiency was obtained at pH = 5 using a single 6W UV system. The removal of phenol by the RO membrane at various pH (3, 5, and 7) at two different feed pressures (50, and 70 psi) and at different feed concentrations (35, 50, and 100 ppm) was examined. The removal efficiencies after 60 min for UV, RO, and UV/RO hybrid systems were obtained as 17, 20, and 58%, respectively. In addition, the results showed that an increase in feed concentration increases the removal efficiency of phenol in the UV/RO hybrid system, while the effect of pressure showed the presence of a critical pressure after which the removal is efficient. The critical pressure in the present study was obtained as 50 psi.
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The toxicity of phenol even at low concentrations in industrial effluents is high enough to meet ... more The toxicity of phenol even at low concentrations in industrial effluents is high enough to meet its needs for separation. In this paper, a review will be carried out on the traditional
techniques and recent advances in the separation of phenol from its contaminated streams. The most commonly used methods classified based on the phenol concentrations (high,
medium, and low), and also, their advantages and disadvantages that should be considered in the design of industrial wastewater treatment systems will be discussed. Finally, the best methods will be suggested for each concentration range at the influent and, of course, that
is allowable in the final effluent. The survey results recommended that biodegradation, chemical, electrochemical, and photocatalytic oxidation, solid phase extraction, ozonation, reverse osmosis/nanofiltration, and wet air oxidation are useful methods in low phenol concentrations, whereas liquid–liquid extraction, pervaporation, membrane-based solvent extraction, adsorption, and distillation are suggested for high phenol concentrations.
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Papers by shohreh mohammadi
techniques and recent advances in the separation of phenol from its contaminated streams. The most commonly used methods classified based on the phenol concentrations (high,
medium, and low), and also, their advantages and disadvantages that should be considered in the design of industrial wastewater treatment systems will be discussed. Finally, the best methods will be suggested for each concentration range at the influent and, of course, that
is allowable in the final effluent. The survey results recommended that biodegradation, chemical, electrochemical, and photocatalytic oxidation, solid phase extraction, ozonation, reverse osmosis/nanofiltration, and wet air oxidation are useful methods in low phenol concentrations, whereas liquid–liquid extraction, pervaporation, membrane-based solvent extraction, adsorption, and distillation are suggested for high phenol concentrations.
techniques and recent advances in the separation of phenol from its contaminated streams. The most commonly used methods classified based on the phenol concentrations (high,
medium, and low), and also, their advantages and disadvantages that should be considered in the design of industrial wastewater treatment systems will be discussed. Finally, the best methods will be suggested for each concentration range at the influent and, of course, that
is allowable in the final effluent. The survey results recommended that biodegradation, chemical, electrochemical, and photocatalytic oxidation, solid phase extraction, ozonation, reverse osmosis/nanofiltration, and wet air oxidation are useful methods in low phenol concentrations, whereas liquid–liquid extraction, pervaporation, membrane-based solvent extraction, adsorption, and distillation are suggested for high phenol concentrations.