Skip to main content

Raphael Semiat

Professor Emeritus

Personal Info

Ph.D. 1978, Technion-Israel Institute of Technology.

Research Fields

Sustainability: Environment, Water, and Energy,  Surface-Phenomena,  Processes

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. Nano Catalysis and adsorption, modeling mass transfer in membranes.
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.
Industrial Projects
Development of crystallization process for aluminum-chloride-hexa-hydrate production from fly ash. (Mashal)
Velocity measurements of drops ejected from printing heads. (Magnet program with industrial companies in the field (Scitex, Idanit, Nur and Indigo)
Development of desalination brine carrier to the sea. (Mekorot)
Development of new type of extraction column with Bateman Eng.
Increased recovery of BWRO inland desalination (IDE,GES)
Fouling prevention (Mekorot, BASF)
Enhanced potash recovery (DSW)
UF membranes production (Mem-Tech)


Xin Yu, Ting Wu, Xue-Jing Yang, Jing Xu, Jordan Auzam, Raphael Semiat, Yi Fan Han,  ,Journal of Hazardous Materials, 305, 2016, 178–189
Hasson, D., Shemer, H. and Semiat, R., Removal of scale forming ions by a novel cation exchange electrochemical system – a review, Desalination and water treatment. (2015) 1–15
Semiat, R., Israel’s Chemicals Industry: From the Desert to the Dead Sea– invited article for the Global Outlook CEP Journal, (October 2015) 36-42.
Sagiv, A., Christofides, P.D., Cohen, Y., Raphael Semiat, R., On the Analysis of FO Mass Transfer Resistances via CFD Analysis and Film Theory, Journal of Membrane Science 495 (2015) 198–205
Schwartz, R., Shemer, H., Hasson, D. and Semiat, R. Kinetics of dissolution of magnesia pellets in a packed bed, Desalination 373 (2015) 10–15
Zelmanov, G. and Semiat, R., The influence of competitive inorganic ions on phosphate removal from water by adsorption on iron (Fe+3) oxide/hydroxide Nanoparticles-based agglomerates, Journal of Water Process Engineering 5 (2015) 143–152
Miller, S., Shemer, H. and Semiat, R., Energy and environmental issues in desalination, Desalination 366(2015),2-8 invited article for the Special Issue on Energy in Desalination,
Kartashevsky, M., Semiat, R. and Dosoretz G.C, Phosphate adsorption on granular ferric hydroxide to increase product water recovery in reverse osmosis-desalination of secondary effluents, Desalination, Special issue on desalination for agriculture. 364 (2015) 53–61
Ring, S., Hasson, H., Shemer, H. and Semiat, R. Simple modeling of Donמan separation processes, Journal of Membrane Science 476 2015, 348–355
Shemer, H. Hasson, D. and Semiat, R., State-of-the-art review on post-treatment technologies Desalination,. 356, 15 January 2015, 285–293
Shlosman, K., Suckeveriene, R,Y., Rosen-Kligvasser, J., Tchoudakov, R., Zelikman, E., Semiat, R. and Narkis,M., Controlled Migration of Antifog Additives from LLDPE Compatibilized with LLDPE Grafted Maleic Anhydride, POLYMERS FOR ADVANCED TECHNOLOGIES, 2014 25 12, 1484-1491

Zelmanov, G. and Semiat, R., Phosphate removal from aqueous solution by an adsorption-ultrafiltration hybrid continuous system. Separation and Purification Technology 132 (2014) 487–495

Sagiv, A., Zhu, A, Christofides, P.D., Cohen, Y. and Semiat, R., Analysis of Forward Osmosis Desalination via Two-Dimensional FEM Model, Journal of Membrane Science, 464, August 15 2014, Pages 161–172

Hasson, D. Beck, A. Fingerman, F. Tachman, C. Shemer, H. Semiat, R. Simple Model for Characterizing a Donnan Dialysis Process. Industrial & Engineering Chemistry Research 53 (2014) 6094-6102.

Yürüm, A., Kocabaş-Ataklı, ZÖ, Sezen, M, Semiat, R. and , ürüm, Y. Fast Deposition of Porous Iron Oxide on Activated Carbon by Microwave Heating and Arsenic (V) Removal from Water, Chemical Engineering Journal, 242(2014)321-332

Zelmanov, G. and Semiat, R., Boron removal from water and its recovery using iron (Fe+3) oxide/hydroxide based nanoparticles (NanoFe) and NanoFe impregnated granular activated carbon as adsorbent, Desalination, 2014, 333, 1, 15 January 107-117

Ronen, A., Semiat, R., and Carlos G. D. Impact of ZnO embedded feed spacer on biofilm development in membrane system. Water research 2013. 47 (17), pp. 6628-6638

Gorni-Pinkesfeld, O., Shemer, H.,  Hasson, D. and Semiat, R., Electrochemical removal of phosphate ions from treated wastewater, Industrial & Engineering Chemistry Research, 2013, 52 (38) , pp. 13795-13800

Shemer, H., Hasson, D. and Semiat, R. Design, Considerations of a packed calcite bed for hardening desalinated water, Industrial & Engineering Chemistry Research. 2013 52 (31), pp. 10549-10553

Zaslavschi, I., Shemer , H., Hasson, D. and, Semiat, R.,  Electrochemical CaCO3 scale removal with a bipolar membrane system, Journal of Membrane Science 445(2013)88–95

Zaslavschi, I., Shemer, H., Hasson, D. and Semiat, R., Rotating cylinder technique for assessing the effectiveness of anti-scalants by determination of surface reaction control inhibition. Water research 47 (2013) 3716-3722.

Kesler, V., Hasson, D., Shemer, H., Semiat, R., Bartels, C. and Wilf, M., Turbidity and pH dissipations in dosage of high concentration NaOH solution to sea water, Desalination and Water Treatment, 2013, 51, 7-9, 1641-1650

Ronen, A.,  Semiat R: and Dosoretz C. G. Antibacterial efficiency of composite nano-ZnO in biofilm development in flow-through systems, Desalination and Water Treatment, 2013, 51, 4-6, 988-996

Hasson, D., Semiat, R. and Shemer, H., Priel, M., and Nadav, N., Simple process for hardening desalinated water with Mg+2 ions, Desalination and Water Treatment, 2013,51, 4-6, 924-929

Shemer, H., Hasson, D., Semiat, R., Priel, M., Nadav, N., Shulman, A., and Gelman, Y. Remineralization of desalinated water by limestone dissolution with carbon dioxide, Desalination and Water Treatment, 2013, 51, 4-6, 877-881

Zelmanov, G. and Semiat, R., Selenium removal from water and its recovery using iron (Fe+3) oxide/hydroxide-based nanoparticles sol (NanoFe) as an adsorbent, Separation and Purification Technology. Separation and Purification Technology 103 (2013) 167–172

Segev, R., Hasson, D. and Semiat, R., Modeling CacO3 precipitation in fluidized bed CO2 stripping of a carbonate solution. Desalination 311 (2013) 192–197

Segev, R., Hasson, D. and Raphael Semiat, R., Rigorous modeling of the kinetics of calcium carbonate deposit formation CO2 effect, AICHE JOURNAL, (2012) 58, 7, P 2286.

Segev, R., Hasson, D. and Raphael Semiat, R., Rigorous Modeling of the Kinetics of Calcium Carbonate Deposit Formation, AIChE Journal (2012) 58(4),1222–1229

Semiat R. and Hasson, D., Water Desalination, Reviews in Chemical Engineering, 28,1 2012, pp. 43-60.

Macedonio, F., Drioli, E., Gusev, A., Bardow, A., A., Semiat, R. and Kurihara, M., Efficient technologies for worldwide clean water supply, Chemical Engineering and Processing: Process Intensification, (2012), 51, 2–17

Zelmanov, G. and Semiat, R., “Phosphate Removal from Water and its Recovery by Using Iron (3) Oxide- based Nano-Adsorbent”. Environmental Engineering and Management Journal, December 2011, Vol.10, No. 12, 1923-1933

Zach-Maor, A., Semiat, R., Shemer, H. Fixed bed phosphate adsorption by immobilized nano-magnetite matrix: experimental and a new modeling approach, Adsorption (2011), 17(6), 929-936.

Hasson, D., Shemer, H., Brook,I.,  Zaslavschi, I., Semiat, R., Wilf, M. and Bartels, C., Scaling propensity of seawater in RO boron removal processes, Journal of Membrane Science 384 (2011) 198– 204

Hasson, D., Segev, R., Lisitsin, D., Liberman, B. and Semiat, R., High Recovery Brackish Water Desalination Process Devoid of Precipitation Chemicals, Desalination 283 (2011) 80–88. Special issue in honor of Professor Tony Fane on his 70th Birthday

Segev, R., Hasson, D. and Raphael Semiat, R., Improved high recovery brackish water desalination process based on fluidized bed air stripping, Desalination (2011), 281, 75-79.

Zach-Maor, Z., Semiat, R., Shemer, H. Adsorption-desorption mechanism of phosphate by immobilized nano-sized magnetite layer: interface and bulk interactions. Journal of Interface and Colloid Science, 2011, 363(2), 608-614.

Zach-Maor, A., Semiat, R., and Shemer, H., Removal of heavy metals by immobilized magnetite nano-particles, Desalination and Water Treatment, 31(2011)64-70

Zaslavschi, I., Hasson, D., Shemer, H., Semiat, R., Wilf, M. and Bartels, C., “Correlation of CaCO3 induction times measured by an electrochemical technique”

Desalination and Water Treatment, 31(2011)59-63.

Vulf, S., Sutzkover-Gutman, I., Hasson, D. and Semiat, R., Effect of the concentration polarization on the fouling driving force of UF membranes, Desalination and water treatment, 31(2011)54-58

Sutzkover-Gutman, Hasson, D. and Semiat, R., Humic acid removal by deep-bed filtration and by UF membranes, Desalination and water treatment, 31(2011)42-53

Zelmanov, G. and Semiat, R. Iron (Fe+3) oxide/hydroxide nanoparticles – based agglomerates suspension as adsorbent for chromium (Cr+6) removal from water and recovery, Separation and Purification Technology. (2011), 80(2), 330-337.

Hasson, D., Sidorenko, G. and Semiat, R. Low electrode area electrochemical scale removal system, Desalination and water treatment, 31(2011)35-41

Halaui, R., Moldavsky, A., Cohen, Y., Semiat R. and E. Zussman, Hollow fiber development by co-electrospinning, Journal of Membrane Science, 379 (2011) 370– 377

Sagiv, A. and Semiat, R., Finite element analysis of FO/PRO membrane systems with NaCl solutions, Journal of Membrane Science, 379 (2011) 86– 96

Zach-Maor, A., Semiat, R. and Shemer, H., Synthesis, performance, and modeling of immobilized nano-sized magnetite layer for phosphate removal. Journal of Colloid and Interface Science (2011), 357(2), 440-446.

Shemer H. and Semiat, R., Impact of halogen based disinfectants in seawater on polyamide RO membranes, Desalination Special issue to honor professor David Hasson, 273 (2011), 179-183.

Bach, A. and Semiat, R., the Role of Activated Carbon as a Catalyst in GAC/Iron Oxide/H2O2 Oxidation Process, Desalination Special issue to honor professor David Hasson, 273 (2011), 57-63

Raphael Semiat

Professor Emeritus