Preparation, structure characteristics and separation properties of thin-film composite polyamide-urethane seawater reverse osmosis membrane

Remoção De Cromo De Banhos Residuais De Curtimento Através De Precipitação Química E Eletrocoagulação

“…O processo de RO se destaca de outras técnicas de separação de soluto, e é uma técnica muito empregada no processo de dessalinização da água do mar (LIU et al, 2008). A RO é responsável por mais de 20% da capacidade de dessalinização do mundo (SHAHALAM et al, 2002).…”

Thin Film Nanocomposite Membranes for Water Desalination

“…The TFC RO membranes with PA-urethane as the active layer included the amide functional group -CONH-, urethane functional group -OCONH-, and the hydroxyl functional group -OH. The optimized PA-urethane TFC membrane had better desalination performance than that of the PA TFC membrane fabricated under the same conditions [14,98,99]. However, traditional MPD-TMC PA materials have been used in most cases of TFN membrane fabrication.…”

“…When compared with CA membranes, the interfacially polymerized PA membranes exhibit superior water flux, salt and organic rejection; higher pressure compaction resistance; wider operating temperature range (0-45 • C) and pH range (from 1 to 11); and higher stability to biological attack [8,13]. Therefore, this class of membranes is widely used in commercial single-pass seawater desalination plants around the world, and they offer a combination of high flux and high selectivity, which is unmatched by the CA membranes [14,15]. However, the PA membranes exhibit some drawbacks in desalination, such as chlorine and fouling susceptibility, which may worsen the membrane performance by shortening membrane life, and reducing flux or salt rejection [2,[16][17][18][19][20][21][22].…”

“…(Source: Reproduced by permission of The Royal Society of Chemistry). (b) Interfacial polymerization of polyamide-urea and urethane[14,97].…”

Effect of Nonideal Solution Behavior on Desalination of a Sodium Chloride (NaCl) Solution and Comparison to Seawater

“…Gibbs free energy for a sodium chloride (NaCl) solution is evaluated using various property models and the least work is evaluated as a function of feed salinity and recovery ratio. The NaCl solution results are also compared to the least work calculation evaluated using seawater properties because the use of aqueous NaCl solutions is common in laboratory studies of desalination systems [10][11][12][13][14] as well as in industry [15].…”