A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification

M. A. Abd El-Ghaffar; Hossam A. Tieama

doi:doi:10.11648/j.cbe.20170202.11

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A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification

M. A. Abd El-Ghaffar, Hossam A. Tieama

Published in Chemical and Biomolecular Engineering (Volume 2, Issue 2)

Received: 6 December 2016 Accepted: 23 January 2017 Published: 2 March 2017

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Abstract

Today, membrane separation technologies are widely used in many areas of water and wastewater treatment. Membrane processes can be used to produce potable water from surface water, groundwater, brackish water, or seawater, or to treat industrial wastewaters before they are discharged or reused. Membrane separation systems have many advantages over traditional water or wastewater treatment processes, lower operating and maintenance costs in comparison to conventional systems consisting of coagulation, clarification, and aerobic and anaerobic treatments. • Membrane separation systems are easy to operate and the performance is more reliable. • Membrane systems give a compact and modular construction, which occupies less floor space in comparison to the conventional treatment systems. In this review, we will introduce fundamental concepts of the membrane and membrane-separation processes, such as membrane definition, membrane classification, membrane formation, module configuration, transport mechanism, system design. Four widely used membrane separation processes in water and wastewater treatment, namely, microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), will be discussed in detail. Some basic requirements for membranes are • high flux of the product, good mechanical strength for supporting the physical structure, good selectivity for the desired substances. Generally, high selectivity is related to membrane properties, such as small pores and high hydraulic resistance or low permeability.. The permeability increases with increasing density of pores, and the overall membrane resistance is directly proportional to its thickness. Therefore, a good membrane must have a narrow range of pore sizes, a high porosity, and a thin layer of material. Membranes can be either dense or porous. Separation by dense membranes relies on physicochemical interaction between the permeating components and the membrane material. Porous membranes, on the other hand, achieve separation by size exclusion, where the rejected material may be either dissolved or suspended depending on its size relative to that of the pore. Membranes can be organic (polymeric) or inorganic (ceramic or metallic), according to its composition, and their morphology is dependent on the nature of the material. There is a need for improved membranes that have higher efficiency and are more resistant to the chemical environment, especially chlorine. This article summarizes the art of membrane technology.

Published in	Chemical and Biomolecular Engineering (Volume 2, Issue 2)
DOI	10.11648/j.cbe.20170202.11
Page(s)	57-82
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Membranes, Water Purification, Classifications, Configurations, Surface Modifications, Characteristics, Separation Techniques

References

[1]	American Water Works Association, Reverse Osmosis and Nanofiltration, American Water Works Association, 2001.
[2]	Mulder M (1996) Basic principles of membrane technology, Kluwer, Netherlands.
[3]	Ferry JD (1936) Ultrafilter membranes and ultrafiltration. Chem Rev 18 (3): 373–455.
[4]	Milisic V (1986) Anti-fouling techniques in cross-flow microfiltration. Filtration & Separation 23: 347–349.
[5]	Henry JD (1972). In: Li NN (ed) Recent developments in separation science, vol 2. CRC Press, Cleveland, OH, pp 205–225.
[6]	Fane AG, Fell CJD (1987) A review of fouling and fouling control in ultrafiltration. Desalination 62: 117–136.
[7]	Wei X, Wang R, Fane AG (2006) Development of a novel electrophoresis-. J Memb Sci 273: 47–57.
[8]	Baker, R. W. Membrane Technology and Applications, 2nd ed.; John Wiley & Sons, Ltd.: Chichester, 2004.
[9]	Pinnau, I.; Freeman, B. D.; Pinnau, I.; Freeman, B. D., Eds.; American Chemical Society: Washington D. C., 2000; pp 1-22.
[10]	SEM images kindly provided by Jason Morehouse and Leah Worrel, University of Texas at Austin.
[11]	SEM image taken from “Product Properties: Celgard^® 2320 Microporous Membrane” www.celgard.com/documents/Celgard%202320.pdf
[12]	Journal of Applied Polymer Science, 86 (2002) 3085-3096.
[13]	Journal of Membrane Science, 143, Trushinski, B. J.; Dickson, J.; Smyth, T.; Childs, R. F.; McCarry, B. E. "Polysulfonamide thin-film composite reverse osmosis membranes", 181-188, Copyright 1998, with permission from Elsevier.
[14]	In Membrane Formation and Modification; Pinnau, I.; Freeman, B. D., ACS: Washington D. C., 2000; Vol. 744, pp 96-109.
[15]	Nunes, S. P.; Peinemann, K. V. Membrane Technology in the Chemical Industry; Wiley-VCH: Weinheim, 2001.
[16]	Product Information: Pall Corporation Inorganic membranes, http://www.pall.com/AccuSep.asp, (2004).
[17]	Pelligrino, J.; Sikdar S. K. Membrane Technology Fundamentals for Bioremediation. http://www.membranes.nist.gov, (2004).
[18]	Product Information: Zenon ZeeWeed^®500, http://www.zenonenv.com/products/500.shtml, (2004).
[19]	U. S. Pat. 3367504 (Feb. 6, 1968), J. C. Westmoreland (to Gulf General Atomic, Inc.).
[20]	U. S. Pat. 3417870 (Dec. 24, 1968), D. T. Bray (to Gulf General Atomic, Inc.).
[21]	S. S. Kremen, in Ref. 28, pp. 371–386.
[22]	W. J. Koros and G. K. Fleming, J. Membr. Sci. 83, 1 (1993).
[23]	R. G¨ unther, J. Membr. Sci. 121, 95 (1996).
[24]	R. H. Davis, inW. S. W. Ho and K. K. Sirkar, eds., Membrane Handbook, Chapman and Hall, New York, 1992, pp. 480–505.
[25]	Baker, R. W. Membrane Technology and Applications, 2nd ed.; John Wiley: New York, 2004
[26]	Smith, J. M.; Van Ness, H. C.;. Introduction to Chem. Engin. Thermodynamics, 6th ed.; McGraw- Hill: New York, 2001.
[27]	Robinson, R. A.; Stokes, R. H. Electrolyte Solutions, 2nd ed.; Dover: Mineola, New York, 2002.
[28]	Newman, J.; Thomas-Alyea, K. E. Electrochemical Systems, 3rd ed.; Wiley-Interscience: Hoboken, New Jersey, 2004
[29]	Baker, R. W.; Cussler, E. L.; Eykamp, W.; Koros, W. J.; Riley, R. L.; Strathmann, H. Membrane Separation Systems: Recent Developments and Future Directions; Noyes Data Corp.: Park Ridge, 1991.
[30]	Ho, W. S. W.; Sirkar, K. K. Membrane Handbook; Van Nostrand Reinhold: New York, 1992.
[31]	Lonsdale, H. K. J Memb Sci 1982, 10, 81–181.
[32]	Petersen, R. J. J Memb Sci 1993, 83, 81–150.
[33]	Greenlee, L. F.; Lawler, D. F.; Freeman, B. D.; Marrot, B.; Moulin, P. Water Res 2009, 43, 2317–2348.
[34]	Wang, X.-L.; Tsuru, T.; Nakao, S.-i.; Kimura, S. J Memb Sci 1997, 135, 19–32.
[35]	Bowen, W. R.; Cassey, B.; Jones, P.; Oatley, D. L. J Memb Sci 2004, 242, 211–220.
[36]	Bowen, W. R.; Mohammad, A. W.; Hilal, N. J Memb Sci. 1997, 126, 91–105.
[37]	Bowen, W. R.; Welfoot, J. S. Chem Eng Sci 2002, 57, 1121–1137.
[38]	Bird, R. B.; Stewart, W. E.; Lightfoot, E. N. Transport Phenomena, 2nd ed.; Wiley: New York, 2002.
[39]	Lonsdale, H. K.; Merten, U.; Riley, R. L. J Appl Polym Sci 1965, 9, 1341–1362.
[40]	Wijmans, J. G.; Baker, R. W. J Memb Sci 1995, 107, 1–21.
[41]	Merten, U. Ind Eng Chem Fundamentals 1963, 2, 229–232.
[42]	Paul, D. R. Appl Polym Sci 1972, 16, 771–782.
[43]	Paul, D. R. J Memb Sci 2004, 241, 371–386.
[44]	Rosenbaum, S.; Cotton, O. J Polym Sci 1969, 7, 101–109.
[45]	Millipore Corporation. Types of Filtration. Available at: http://www.millipore.com/membrane/mrc3/filtration_types. 2009.
[46]	Lukaszewicz, R. C.; Tanny, G. B.; Meltzer, T. H. Pharm Technol 1978, 2, 77–83.
[47]	Meltzer, T. H. Filtration in the Pharmaceutical Industry; Marcel Dekker: New York, 1987.
[48]	GEOFFREY M. GEISE, 1 HAE-SEUNG LEE, 2 DANIEL J. MILLER, 1 BENNY D. FREEMAN, 1 JAMES E. MCGRATH, 2 DONALD R. PAUL 1. Received 17 December 2009; revised 31 March 2010; accepted 2 April 2010. Published in WileyInterScience
[49]	Fritzmann, C.; Lowenberg, J.; Wintgens, T.; Melin, T. Desalination 2007, 216, 1–76.
[50]	Wilf, M.; Bartels, C. Desalination 2005, 173, 1–12.
[51]	El-Dessouky, H. T.; Ettouney, H. M. Fundamentals of Salt Water Desalination; Elsevier: Amsterdam, 2002.
[52]	Mickols, W. E. Advances in Materials and Processes for Polym. Mem. Mediated Water Purif.; Pacific Grove: CA, 2009.
[53]	Reid, C. E.; Breton, E. J. J Appl Polym Sci 1959, 1, 133–143.
[54]	Reid, C. E., J. R. J Appl Polym Sci 1959, 2, 264–272.
[55]	Riley, R. L.; Gardner, J. O.; Merten, U. Science 1964, 143, 801–803.
[56]	Lonsdale, H. K.; Merten, U.; Tagami, M. J Appl Polym Sci 1967, 11, 1807–1820.
[57]	Rosenbaum, S.; Mahon, H. I.; Cotton, O. J Appl Polym Sci 1967, 11, 2041–2065.
[58]	1 Vos, K. D.; Burris, F. O., Jr.; Riley, R. L. J Appl Polym Sci 1966, 10, 825–832.
[59]	Richter, J. W.; Hoehn, H. (E. I. du Pont de Memours and Company, Wilmington, DE). U.S. Patent 3,567,632, March 2, 1971.
[60]	King, W. M.; Hoernschemeyer, D. L.; Saltonstall, C. W., Jr. In Reverse Osmosis Membrane Research; Lonsdale, H. K.; Podall, H. E., Eds.; Plenum Press: New York, 1972; pp 131–162.
[61]	Endoh, R.; Tanaka, T.; Kurihara, M.; Ikeda, K. Desalination 1977, 21, 35–44.
[62]	McKinney, R.; Rhodes, J. H. Macromolecules 2002, 4, 633–637.
[63]	Desalination by Reverse Osmosis; Merten, U., Ed.; MIT Press: Cambridge, 1966.
[64]	Guidelines for Drinking-Water Quality, 3rd ed.; Incorporating First and Second Addenda; Volume 1: Recommendations; World Health Organization: Geneva, Switzerland, 2008.
[65]	Journal of Applied Polymer Science, Vol. 9, No. 4, 1965, 1341–1362. Copyright 1965 John Wiley & Sons, Inc.; Reprinted with permission of John Wiley & Sons, Inc.).
[66]	Zeman, L. J.; Zydney, A. L. Microfilt. and Ultrafilt.: Principles and Applications; Marcel Dekker: New York, 1996
[67]	Schmidt, I.; Binder, K. J Phys 1985, 46, 1631
[68]	Nakanishi, H.; Pincus, P. J Chem Phys 1983, 79, 997.
[69]	Garbassi, F.; Morra, M.; Occhiello, E. Polymer Surfaces: From Physics to Technology; Wiley: Chichester, UK, 1998.
[70]	Cohen, S. M.; Muthukumar, M. J Chem Phys 1989, 90, 5749.
[71]	Affrossman, S.; Kiff, T.; O’neil, S. A.; Pethrick, R. A.; Richards, R. W. Macromolecules 1999, 32, 2721.
[72]	Affrossman, S.; Henn, G.; O’neil, S. A.; Pethrick, R. A.; Stamm, M. Macromolecules 1996, 29, 5010.
[73]	Tanaka, K.; Takahara, A.; Kajiyama, T. Macromolecules 1996, 29, 3232.
[74]	Eynde, X. V.; Bertrand, P. Appl Surf Sci 1999, 141, 1.
[75]	Khulbe, K. C.; Feng, C.; Matsuura, T.; Kapantaidakis, G. C.; Wessling, M.; Koops, G. H. J Membr Sci 2003, 226, 63.
[76]	Liu, Y.; Messmer, M. C. J Phys Chem B 2003, 107, 9774.
[77]	Grull, H.; Schreyer, A.; Berk, N. F.; Majkrzak, C. F.; Han, C. C. Europhys Lett 2000, 50, 107.
[78]	Ulbricht, M. Polymer 2006, 47, 2217.
[79]	Egitto, F. D.; Matienzo, J. IBM J Res Dev 1994, 38, 423
[80]	Grace, J. M.; Gerenser, L. J. J Dispersion Sci Technol 2003, 24, 305.
[81]	Steen, M. L.; Jordan, A. C.; Fisher, E. R. J Membr Sci 2002, 204, 341.
[82]	Khayet, M.; Suk, D. E.; Narbaitz, R. M.; Saterre, J. P.; Matsuura, T. J Appl Polym Sci 2003, 89, 2902.
[83]	Ho, Y.; Matsuura, T.; Santerre, P. J Biomater Sci 2000, 11, 1085.
[84]	Han, W.; Gregor, H. P.; Pearce, E. M. J Appl Polym Sci 1999, 74, 1271
[85]	Knoell, T.; Safarik, J.; Cormack, T.; Riley, R.; Lin, S. W.; Ridgway, H. J Membr Sci 1999, 157, 117.
[86]	Du¨ putell, D.; Staude, E. J Membr Sci 1993, 78, 45.
[87]	Kochkodan, V.; Hilal, N.; Goncharuk, V.; Al-Khatib, L.; Levadna, T. Colloid J 2006, 68, 267.
[88]	Khulbe, K. C.; Matsuura, T.; Lamarche, G.; Kim, H. J. J Membr Sci 1997, 135, 211.
[89]	K. C. Khulbe, C. Feng, T. Matsuura, Industrial Membrane Research Laboratory, Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada. Received 3 December 2008; accepted 13 July 2009. Published online 14 September 2009 in Wiley Inter Science.

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M. A. Abd El-Ghaffar, Hossam A. Tieama. (2017). A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chemical and Biomolecular Engineering, 2(2), 57-82. https://doi.org/10.11648/j.cbe.20170202.11

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ACS Style

M. A. Abd El-Ghaffar; Hossam A. Tieama. A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chem. Biomol. Eng. 2017, 2(2), 57-82. doi: 10.11648/j.cbe.20170202.11

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AMA Style

M. A. Abd El-Ghaffar, Hossam A. Tieama. A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chem Biomol Eng. 2017;2(2):57-82. doi: 10.11648/j.cbe.20170202.11

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@article{10.11648/j.cbe.20170202.11,
  author = {M. A. Abd El-Ghaffar and Hossam A. Tieama},
  title = {A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification},
  journal = {Chemical and Biomolecular Engineering},
  volume = {2},
  number = {2},
  pages = {57-82},
  doi = {10.11648/j.cbe.20170202.11},
  url = {https://doi.org/10.11648/j.cbe.20170202.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.cbe.20170202.11},
  abstract = {Today, membrane separation technologies are widely used in many areas of water and wastewater treatment. Membrane processes can be used to produce potable water from surface water, groundwater, brackish water, or seawater, or to treat industrial wastewaters before they are discharged or reused. Membrane separation systems have many advantages over traditional water or wastewater treatment processes, lower operating and maintenance costs in comparison to conventional systems consisting of coagulation, clarification, and aerobic and anaerobic treatments. • Membrane separation systems are easy to operate and the performance is more reliable. • Membrane systems give a compact and modular construction, which occupies less floor space in comparison to the conventional treatment systems. In this review, we will introduce fundamental concepts of the membrane and membrane-separation processes, such as membrane definition, membrane classification, membrane formation, module configuration, transport mechanism, system design. Four widely used membrane separation processes in water and wastewater treatment, namely, microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), will be discussed in detail. Some basic requirements for membranes are • high flux of the product, good mechanical strength for supporting the physical structure, good selectivity for the desired substances. Generally, high selectivity is related to membrane properties, such as small pores and high hydraulic resistance or low permeability.. The permeability increases with increasing density of pores, and the overall membrane resistance is directly proportional to its thickness. Therefore, a good membrane must have a narrow range of pore sizes, a high porosity, and a thin layer of material. Membranes can be either dense or porous. Separation by dense membranes relies on physicochemical interaction between the permeating components and the membrane material. Porous membranes, on the other hand, achieve separation by size exclusion, where the rejected material may be either dissolved or suspended depending on its size relative to that of the pore. Membranes can be organic (polymeric) or inorganic (ceramic or metallic), according to its composition, and their morphology is dependent on the nature of the material. There is a need for improved membranes that have higher efficiency and are more resistant to the chemical environment, especially chlorine. This article summarizes the art of membrane technology.},
 year = {2017}
}

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TY - JOUR
T1 - A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification
AU - M. A. Abd El-Ghaffar
AU - Hossam A. Tieama
Y1 - 2017/03/02
PY - 2017
N1 - https://doi.org/10.11648/j.cbe.20170202.11
DO - 10.11648/j.cbe.20170202.11
T2 - Chemical and Biomolecular Engineering
JF - Chemical and Biomolecular Engineering
JO - Chemical and Biomolecular Engineering
SP - 57
EP - 82
PB - Science Publishing Group
SN - 2578-8884
UR - https://doi.org/10.11648/j.cbe.20170202.11
AB - Today, membrane separation technologies are widely used in many areas of water and wastewater treatment. Membrane processes can be used to produce potable water from surface water, groundwater, brackish water, or seawater, or to treat industrial wastewaters before they are discharged or reused. Membrane separation systems have many advantages over traditional water or wastewater treatment processes, lower operating and maintenance costs in comparison to conventional systems consisting of coagulation, clarification, and aerobic and anaerobic treatments. • Membrane separation systems are easy to operate and the performance is more reliable. • Membrane systems give a compact and modular construction, which occupies less floor space in comparison to the conventional treatment systems. In this review, we will introduce fundamental concepts of the membrane and membrane-separation processes, such as membrane definition, membrane classification, membrane formation, module configuration, transport mechanism, system design. Four widely used membrane separation processes in water and wastewater treatment, namely, microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), will be discussed in detail. Some basic requirements for membranes are • high flux of the product, good mechanical strength for supporting the physical structure, good selectivity for the desired substances. Generally, high selectivity is related to membrane properties, such as small pores and high hydraulic resistance or low permeability.. The permeability increases with increasing density of pores, and the overall membrane resistance is directly proportional to its thickness. Therefore, a good membrane must have a narrow range of pore sizes, a high porosity, and a thin layer of material. Membranes can be either dense or porous. Separation by dense membranes relies on physicochemical interaction between the permeating components and the membrane material. Porous membranes, on the other hand, achieve separation by size exclusion, where the rejected material may be either dissolved or suspended depending on its size relative to that of the pore. Membranes can be organic (polymeric) or inorganic (ceramic or metallic), according to its composition, and their morphology is dependent on the nature of the material. There is a need for improved membranes that have higher efficiency and are more resistant to the chemical environment, especially chlorine. This article summarizes the art of membrane technology.
VL - 2
IS - 2
ER -

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M. A. Abd El-Ghaffar

Polymers and Pigments Department, National Research Center, Dokki, Giza, Egypt
Hossam A. Tieama

Polymer Materials Research Department, City of Scientific Research & Technological Applications, Alexandria, Egypt

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M. A. Abd El-Ghaffar, Hossam A. Tieama. (2017). A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chemical and Biomolecular Engineering, 2(2), 57-82. https://doi.org/10.11648/j.cbe.20170202.11

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M. A. Abd El-Ghaffar; Hossam A. Tieama. A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chem. Biomol. Eng. 2017, 2(2), 57-82. doi: 10.11648/j.cbe.20170202.11

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AMA Style

M. A. Abd El-Ghaffar, Hossam A. Tieama. A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification. Chem Biomol Eng. 2017;2(2):57-82. doi: 10.11648/j.cbe.20170202.11

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@article{10.11648/j.cbe.20170202.11,
  author = {M. A. Abd El-Ghaffar and Hossam A. Tieama},
  title = {A Review of Membranes Classifications, Configurations, Surface Modifications, Characteristics and Its Applications in Water Purification},
  journal = {Chemical and Biomolecular Engineering},
  volume = {2},
  number = {2},
  pages = {57-82},
  doi = {10.11648/j.cbe.20170202.11},
  url = {https://doi.org/10.11648/j.cbe.20170202.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.cbe.20170202.11},
  abstract = {Today, membrane separation technologies are widely used in many areas of water and wastewater treatment. Membrane processes can be used to produce potable water from surface water, groundwater, brackish water, or seawater, or to treat industrial wastewaters before they are discharged or reused. Membrane separation systems have many advantages over traditional water or wastewater treatment processes, lower operating and maintenance costs in comparison to conventional systems consisting of coagulation, clarification, and aerobic and anaerobic treatments. • Membrane separation systems are easy to operate and the performance is more reliable. • Membrane systems give a compact and modular construction, which occupies less floor space in comparison to the conventional treatment systems. In this review, we will introduce fundamental concepts of the membrane and membrane-separation processes, such as membrane definition, membrane classification, membrane formation, module configuration, transport mechanism, system design. Four widely used membrane separation processes in water and wastewater treatment, namely, microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), will be discussed in detail. Some basic requirements for membranes are • high flux of the product, good mechanical strength for supporting the physical structure, good selectivity for the desired substances. Generally, high selectivity is related to membrane properties, such as small pores and high hydraulic resistance or low permeability.. The permeability increases with increasing density of pores, and the overall membrane resistance is directly proportional to its thickness. Therefore, a good membrane must have a narrow range of pore sizes, a high porosity, and a thin layer of material. Membranes can be either dense or porous. Separation by dense membranes relies on physicochemical interaction between the permeating components and the membrane material. Porous membranes, on the other hand, achieve separation by size exclusion, where the rejected material may be either dissolved or suspended depending on its size relative to that of the pore. Membranes can be organic (polymeric) or inorganic (ceramic or metallic), according to its composition, and their morphology is dependent on the nature of the material. There is a need for improved membranes that have higher efficiency and are more resistant to the chemical environment, especially chlorine. This article summarizes the art of membrane technology.},
 year = {2017}
}

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