The Experts below are selected from a list of 120213 Experts worldwide ranked by ideXlab platform
Mohamed Wahib Naceur - One of the best experts on this subject based on the ideXlab platform.
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embodying the Chemical Water Treatment in the green chemistry a review
Desalination, 2011Co-Authors: Djamel Ghernaout, Badiaa Ghernaout, Mohamed Wahib NaceurAbstract:Green chemistry (GC) is the key to sustainable development as it will lead to new solutions to existing problems. Moreover, it will present opportunities for new processes and products and at its heart is scientific and technological innovation. This paper aims to contribute to a better understanding of the new challenges that chemistry is facing. A particular emphasis is accorded to the need for the development of environmentally friendly technologies for Water Treatment where GC can be satisfied. Indeed, following the establishment of the 12 Principles of GC, there has been a steady growth in our understanding of what GC means. Furthermore, there are great perspectives relating to the greening of Chemical Water Treatment, especially in terms of ferrate(VI) adding, as oxidant/disinfectant/coagulant in the same time, and microchannel reactors which would be considered as promising devices for Water Treatment due to their proved advantages.
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on the dependence of chlorine by products generated species formation of the electrode material and applied charge during electroChemical Water Treatment
Desalination, 2011Co-Authors: Djamel Ghernaout, Mohamed Wahib Naceur, Ali AouabedAbstract:Chemical Water Treatment problems such as disinfection by-products formation have urged on the search of better Water Treatment technologies such as electroChemical Water technologies which have been applied successfully in different Water/wasteWater pollutant removal. However, their wide extension is hindered by some technical problems such as chlorine by-products (CBPs) generated species. Indeed, during electroChemical process, these carcinogenic substances may be formed depending on the electrode material and applied voltage. This review concerns the dependence of CBPs generated species formation of the electrode material and applied charge during electroChemical Water Treatment. It is concluded that the use of electrodes producing highly reactive species must be more carefully controlled in hygienically and environmentally oriented applications. From this point of view, Pt and boron-doped diamond (BDD) anodes are proved more convenient than other electrodes. Indeed, the great capability of a BDD anode to produce reactive oxygen species and other oxidising species during the electrolysis allows establishing a chlorine-free disinfection process.
Djamel Ghernaout - One of the best experts on this subject based on the ideXlab platform.
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embodying the Chemical Water Treatment in the green chemistry a review
Desalination, 2011Co-Authors: Djamel Ghernaout, Badiaa Ghernaout, Mohamed Wahib NaceurAbstract:Green chemistry (GC) is the key to sustainable development as it will lead to new solutions to existing problems. Moreover, it will present opportunities for new processes and products and at its heart is scientific and technological innovation. This paper aims to contribute to a better understanding of the new challenges that chemistry is facing. A particular emphasis is accorded to the need for the development of environmentally friendly technologies for Water Treatment where GC can be satisfied. Indeed, following the establishment of the 12 Principles of GC, there has been a steady growth in our understanding of what GC means. Furthermore, there are great perspectives relating to the greening of Chemical Water Treatment, especially in terms of ferrate(VI) adding, as oxidant/disinfectant/coagulant in the same time, and microchannel reactors which would be considered as promising devices for Water Treatment due to their proved advantages.
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on the dependence of chlorine by products generated species formation of the electrode material and applied charge during electroChemical Water Treatment
Desalination, 2011Co-Authors: Djamel Ghernaout, Mohamed Wahib Naceur, Ali AouabedAbstract:Chemical Water Treatment problems such as disinfection by-products formation have urged on the search of better Water Treatment technologies such as electroChemical Water technologies which have been applied successfully in different Water/wasteWater pollutant removal. However, their wide extension is hindered by some technical problems such as chlorine by-products (CBPs) generated species. Indeed, during electroChemical process, these carcinogenic substances may be formed depending on the electrode material and applied voltage. This review concerns the dependence of CBPs generated species formation of the electrode material and applied charge during electroChemical Water Treatment. It is concluded that the use of electrodes producing highly reactive species must be more carefully controlled in hygienically and environmentally oriented applications. From this point of view, Pt and boron-doped diamond (BDD) anodes are proved more convenient than other electrodes. Indeed, the great capability of a BDD anode to produce reactive oxygen species and other oxidising species during the electrolysis allows establishing a chlorine-free disinfection process.
D V Tarasov - One of the best experts on this subject based on the ideXlab platform.
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the process control system of the Chemical Water Treatment department at cogeneration power station tets 27 of mosenergo
Thermal Engineering, 1999Co-Authors: L A Barskii, L M Zaidenberg, A M Gelfand, V P Govorko, D V TarasovAbstract:One of the subsystems of the integrated process control system (PCS) at station level, the Chemical Water Treatment department PCS, is considered. Presently, this subsystem has been put partially into commercial operation and partially into trial operation. The main arrangements, designs, and technical proposals were worked out, and the algorithms and programs that control the technological equipment of the Chemical Water Treatment department were developed.
Konstantinos D. Demadis - One of the best experts on this subject based on the ideXlab platform.
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Being "green" in Chemical Water Treatment technologies: issues, challenges and developments
Desalination, 2008Co-Authors: Antonia Ketsetzi, Aggeliki Stathoulopoulou, Konstantinos D. DemadisAbstract:Mineral scale deposits in industrial Waters supporting a number of process industries are a major problem that causes unexpected shutdowns and costly Chemical or mechanical cleaning operations. Some deposits, although less common, are exceptionally troublesome. These include silica and magnesium silicate. Accumulation of these deposits greatly diminishes system performance. Scale prevention can be achieved by use of scale inhibitors that are added to any given Treatment in minute (parts per million) quantities. Use of environmentally friendly Water additives for colloidal silica scale control is a topic of great interest and intense research efforts in our laboratory. Inhibition and dispersion are two generic approaches for preventing silica scale and fouling. Inhibition stops scaleforming precipitates from forming, whereas dispersion keeps scale particles from being attached onto critical surfaces. We have pursued silicate polymerization inhibition by use of “green”, environmentally-friendly cationic macromolecules. These utilize inulin as the backbone, which has been Chemically modified to introduce quaternary ammonium moieties. Three CATIN polymers (CATIN = cationic inulin) were tested: CATIN-1 (DS = 0.22), CATIN-2 (DS = 0.86), CATIN-3 (DS = 1.28), DS = degree of substitution at dosages 40, 80 and 100 ppm in supersaturated silicate solutions (500 ppm) adjusted to pH 7 for 8 h. Measurements for soluble silicate were performed every hour. After 8 h polymerization time, CATIN-1 achieves stabilization of 275 ppm silicate (~90 ppm above the control), whereas CATIN-2 and CATIN-3 exhibit virtually identical performance, stabilizing ~340 ppm silicate (~150 ppm above the control). Inhibitor dosage increase to 80 ppm does not induce any additional inhibitory performance. Further inhibitor dosage increase to 100 ppm appears to have additional detrimental effects on inhibitory activity. CATIN-1 maintains 247 ppm soluble silicate (only ~50 ppm above the control), CATIN-2 keeps ~300 ppm soluble
L A Barskii - One of the best experts on this subject based on the ideXlab platform.
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the process control system of the Chemical Water Treatment department at cogeneration power station tets 27 of mosenergo
Thermal Engineering, 1999Co-Authors: L A Barskii, L M Zaidenberg, A M Gelfand, V P Govorko, D V TarasovAbstract:One of the subsystems of the integrated process control system (PCS) at station level, the Chemical Water Treatment department PCS, is considered. Presently, this subsystem has been put partially into commercial operation and partially into trial operation. The main arrangements, designs, and technical proposals were worked out, and the algorithms and programs that control the technological equipment of the Chemical Water Treatment department were developed.