Separation Processes with Special Emphasis on Heat and Mass
Transfer Phenomena in Liquid-Liquid and Solid-Liquid Systems.
Water Technologies: Water Desalination purification and waste
treatment problems.
Application of Electro-Optical Techniques in the study of such
systems.
Research Topics
Water Technology
Desalination using evaporation and membrane processes. Problems of membranes fouling, pre and post treatment. Uses of membranes for water quality problems and waste treatment. Enhanced recovery with concentrate treatment.
Separation Processes
Membrane processes. Crystallization. Nano crystallization. Use of nano crystals for removal of organic matter from water. Modeling of liquid-liquid settlers. Improvement of extraction columns. Mechanisms of heat transfer enhancement.
Optical measurements techniques
Use of Laser Doppler Velocimetry for two phase-flow. Development of Laser Grating Velocimetry technique for relatively large particles. Study of drops motion in printing heads. Shear induced migration in concentrated slurries.
Industrial Project
Desalination. Concentrate treatment. Water treatments. Double falling film evaporator for solution concentration. Crystallization of aluminum chloride.
Lisitsin, D., Hasson, D. and Semiat, R. "Critical flux detection in a silica scaling RO system" Desalination 186, (2006) 311-318.
Greenberg, G., Hasson, D. and Semiat, R., "Limits of RO recovery imposed by calcium phosphate Precipitation", Desalination 183 (2005) 273-288.
Sagiv, A. and Semiat, R. "Backwash of RO spiral wound membranes", Desalination, 179(2005)1-9
Greenberg, G., Hasson, D. and Semiat, R., "Limits of RO recovery imposed by calcium phosphate Precipitation", Desalination 183 (2005) 273-288.
Lisitsin, D., Yang, Q., Hasson, D. and Semiat, R., "Inhibition of CaCO3 scaling on RO membranes by trace amounts of zinc ions", Desalination 183 (2005), 289-300
Ivnitsky H., I. Katz, D. Minz, E. Shimoni, Y. Chen, J. Tarchitzky, R. Semiat and C.G. Dosoretz, "Characterization of Membrane Biofouling in Nanofiltration Processes of Wastewater Treatment" Desalination 185 (2005),255-268.
Gimmelshtein (Modek) M. and R. Semiat, "Investigation of Flow Next to Membrane Walls" Journal of membrane Science (2005), 264(1-2), 137-150.
Semiat, R., Hasson, D., Zelmanov, G. and Hemo, I., “Threshold scaling limits of RO concentrates flowing in a long waste disposal pipeline” Water Science & Technology 49,2 211–219 2004
Yang, Qingfeng; Ma, Zifeng; Hasson, David; Semiat, Raphael. "Destruction of anti-scalants in RO concentrates by electrochemical oxidation" Huagong Xuebao (Chinese Edition) (2004), 55(2), 339-340.
Sagiv, A. and Semiat, R. "Analysis of parameters affecting boron permeation through reverse osmosis membranes" Journal of Membrane Science (2004), 243(1-2), 79-87.
Ramon, G., Green, M., Semiat, R. and Dosoretz, C., “Low strength graywater characterization and treatment by direct membrane filtration” Desalination
170 (2004),241-250
Volkis, V., Nelkenbaum, E., Lisovskii, A., Hasson, Gil., Semiat, R., Kapon, M., Botoshansky, M., Eishen, Y. and Eisen, M. S. “Group 4 Octahedral Benzamidinate Complexes: Syntheses, Structures, and Catalytic Activities in the Polymerization of Propylene Modulated by Pressure Journal of the American Chemical Society 125(8), 2179-2194, 2003.
Semiat, R., Sutzkover, I. and Hasson, D. “Scaling of RO Membranes from Silica Supersaturated Solutions”, Desalination, 157 (2003), 169-191.
Hasson, D., Drak, A. and Semiat, R., “Induction times induced in an RO system by antiscalants delaying CaSO4 precipitation”, Desalination, 157 (2003), 193-207.
Semiat, R., Sutzkover, I. and Hasson, H. “Characterization of the effectiveness of silica anti-scalants” Desalination, 159 (2003), 11-19.
Loimer, T., Nir, A. and Semiat R., "Shear-induced Corrugation of Free Interfaces in Concentrated Suspensions", Journal of Non-Newtonian Fluid Mechanics 102, (2002), p. 115-134.
Blumberg A. and Semiat, R. “Velocity Measurements of Ink Drops Ejected from a Piezoelectric DOD Print head. I Technique Presentation.” IS&T – Journal of Imaging Science and Technology, 46, (2002), p. 171-181
Blumberg A. and Semiat R. “Velocity Measurements of Ink Drops Ejected from a Piezoelectric DOD Print head. II Parameters of ejecting signal” IS&T – Journal of Imaging Science and Technology, 46, (2002), p. 182-189
Lissovskii A., Nelkenbaum, E., Volkis, V., Semiat, R. and Eisen M.S., “Polymerization of Isobutylene and Copolymerization of Isobutylene with Isoprene Promoted by Methylalumoxane” Inorganica Chimica Acta, 334, (2002), p. 243-252
Semiat, R., “Desalination education capacity in Israel”, Desalination 141, (2001), p. 191-198. Invited article.
Hasson, D., Drak, A. and Semiat, R., “Inception of CaSO4 Scaling on RO Membranes at Various Water Recovery Levels”, Desalination, 139, (2001), p. 73-81.
Tismaneanu, R., Ray, B., Khalfin, R., Semiat, R. and Eisen, M. S., “Synthesis, Characterization and Catalytic Activity of Actinide Th-MCM-41 and U-MCM-41 Hexagonal Packed Mesoporous Molecular Sieves”, J. Mol. Catal. A: Chem. 171, (2001), p. 229-241
Semiat, R., Sutzcover, I. and Hasson, D., “Technique for Evaluating Silica Scaling and its Inhibition in RO Desalting” Desalination, 140, (2001) p.181-193
Semiat, R. and Galperin, Y., “Effect of Non-Condensable Gases on Heat Transfer In The MWD Sea Water Distillation Plant.” Desalination 140, (2001), p. 27-46.
Harussi, Y., Rom, D., Galil, N. and Semiat, R., “Evaluation of Membrane Processes to Reduce the Salinity of Reclaimed Wastewater.” Desalination. 137, (2001) p. 71-89
