Pregled bibliografske jedinice broj: 255180
Pressure dependency of the membrane flux
Pressure dependency of the membrane flux // 1st EMCO workshop : Analysis and removal of contaminants from wastewaters for the implementation of the Water Framework Directive (WFD) : Book of Abstracts / Petrović, Mira ; Barcelo, Damia (ur.).
Barcelona: IIQAB-CSIC, 2005. str. 108-108 (poster, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 255180 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Pressure dependency of the membrane flux
Autori
Košutić, Krešimir ; Dolar, Davor ; Kunst, Branko
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
1st EMCO workshop : Analysis and removal of contaminants from wastewaters for the implementation of the Water Framework Directive (WFD) : Book of Abstracts
/ Petrović, Mira ; Barcelo, Damia - Barcelona : IIQAB-CSIC, 2005, 108-108
Skup
1st EMCO workshop : Analysis and removal of contaminants from wastewaters for the implementation of the Water Framework Directive (WFD)
Mjesto i datum
Dubrovnik, Hrvatska, 20-21.10.2 005
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
asymmetric membranes; membrane flux; membrane skin porosity
Sažetak
Most separation membranes have asymmetric, ie. anisotropic structure consisting of a thin upper dense layer, skin, and a porous support layer(s). The membranes' skin is built from a polymer or inorganic material with a continuous interconnecting network of pores in it. As the operating pressures during reverse osmosis and nanofiltration exceed 5 bar the porous skin structure is susceptible to changes leading to minor or major membrane porosity and performance variations. The changes of membrane water flux by pressure variation can be used therefore to determine porosity of membrane's skin, which is an important early step in studying the membrane separation performance. It was shown in this contribution that the membrane skin porosity can be characterized by two compound experimental parameters K' and α . K' generally corresponds to a number and size of the pores in the membranes skin, and α represents a measure of the susceptibility (changes) of the skin's structure under pressure. These porosity parameters of the selected reverse osmosis and nanofiltration membranes were determined. The data obtained were analyzed with respect to stability of the skin structure under pressure, and the changes were explained by the pore size distribution (PSD) curves and the effective number of pores in the membranes' skin A grouping of the membranes according to various skin porosities was the final result of the investigations.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo
