Efficient removal of partially hydrolysed polyacrylamide in polymer-flooding produced water using photocatalytic graphitic carbon nitride nanofibres

Fabrication and characterization of graphene oxide–polyethersulfone (GO–PES) composite flat sheet and hollow fiber membranes for oil–water separation

“…As a result, there is an urgent need to treat this wastewater before it is released to the environment as it can affect groundwater and drinking water resources, endangering ecosystems and at the same time it is important to recover as much usable water as possible . Many techniques have been used to treat the oily wastewater such as coagulation, flotation, biological treatment and membrane filtration . Among them, membrane processes are considered as one of the fastest growing treatment options as it is an energy efficient process, requiring low maintenance and environmentally friendly (no utilization of chemicals during operation) .…”

“…4 Many techniques have been used to treat the oily wastewater such as coagulation, flotation, biological treatment and membrane filtration. 5,6 Among them, membrane processes are considered as one of the fastest growing treatment options as it is an energy efficient process, requiring low maintenance and environmentally friendly (no utilization of chemicals during operation). 6,7 Furthermore, the membrane system also requires a smaller environmental footprint and is easy to scale up, making it wellreceived by the industries.…”

Graphitic Carbon Nitride as a New Sustainable Photocatalyst for Textile Functionalization

“…To date, g-C 3 N 4 has been applied to cotton [ 40 , 41 , 42 , 43 , 44 , 45 , 46 ], polyacrylonitrile [ 47 , 48 , 49 , 50 ], polyester and polyester/viscose fibres [ 51 , 52 , 53 , 54 ], polyethylene terephthalate [ 55 , 56 ], and polylactic acid [ 57 ]. Information about g-C 3 N 4 precursors, g-C 3 N 4 modification, the application method, and the performance of the textile surface functionalized by g-C 3 N 4 is summarised in Table 1 .…”

“…For the surface modification, g-C 3 N 4 was applied using the conventional pad–dry–cure technique [ 53 ], double-dip-double-nip padding, or immersion in the g-C 3 N 4 suspension under suitable conditions followed by squeezing and drying with or without curing [ 40 , 41 , 43 , 45 , 51 , 54 ], spraying [ 44 ] as well as a layer-by-layer (LbL) self-assembly technique [ 42 , 46 ]. Electrospinning was used for fibre bulk modification [ 47 , 48 , 49 , 50 , 55 , 56 , 57 ].…”

“…g-C 3 N 4 nanosheets were also incorporated into the bulk of synthetic fibres, where polyacrylonitrile [ 47 , 48 , 49 , 50 ] and polyethylene terephthalate [ 55 , 56 ] as well as polylactic acid [ 57 ] were used as polymer matrices for the incorporation of g-C 3 N 4 . In these cases, g-CN was dispersed in the polymer solution and was used as a spinning solution for the production of the nonwoven fabrics.…”