High-flux composite hollow fiber nanofiltration membranes fabricated through layer-by-layer deposition of oppositely charged crosslinked polyelectrolytes for dye removal

The Key Role of Modifications in Biointerfaces toward Rendering Antibacterial and Antifouling Properties in Polymeric Membranes for Water Remediation: A Critical Assessment

“…[8,123,[285][286][287][288][289][290][291][292][293][294] This can be achieved via LbL assembly or via dynamic compositing. [8,123,[285][286][287][288][289][290][291][292][293][294] This can be achieved via LbL assembly or via dynamic compositing.…”

Microfiltration membrane possessing chelation function and its adsorption and rejection properties towards heavy metal ions

“…However, at present, the usual commercial porous membranes, including microfiltration, ultrafiltration and nanofiltration membranes, still have some problems for the selective separation or removal of individual small‐molecule substances because the separation function of porous membranes is based only on a sieving mechanism or a size exclusion effect, and those substances whose molecule size is smaller than the pore dimension are not rejected and removed from water . Even though neutral nanofiltration membranes are used, only those organic molecules and inorganic ions, whose molecular weight is greater than about 300 g mol −1 , can be separated or rejected by the membrane process . In a word, for the commercial porous membranes, selective permeability is lacking, and in general, toxic heavy metal ions are difficult to be directly rejected or removed by the porous‐membrane process.…”

“…20,[23][24][25] Even though neutral nanofiltration membranes are used, only those organic molecules and inorganic ions, whose molecular weight is greater than about 300 g mol −1 , can be separated or rejected by the membrane process. [26][27][28] In a word, for the commercial porous membranes, selective permeability is lacking, and in general, toxic heavy metal ions are difficult to be directly rejected or removed by the porous-membrane process. It is obvious that in order to remove heavy metal ions from water bodies by the porous-membrane process, functional porous membranes need to be designed and developed.…”

Positively charged nanofiltration membranes via economically mussel-substance-simulated co-deposition for textile wastewater treatment

“…In fact, positively charged NF membranes are especially suitable for dealing with positively charged solutes such as cationic dyes and metal ions from textile wastewaters due to electrostatic repulsion (Donnan effect). Polyethyleneimine (PEI) as one of the most positively charged polymers has been employed to fabricate positively charged NF membranes via various approaches, such as in suit quaternary amination in casting solution [8], interfacial polymerization [9] and layer-bylayer deposition [10]. However, these works disclosed on positively charged NF membranes are still suffering some problems like involvement of toxic organochlorine, high cost raw materials and complicated multiple stages.…”