GO–CuO nanocomposites assimilated into CA–PES polymer membrane in adsorptive removal of organic dyes from wastewater

Development of polyethersulfone/polylactic acid‐blended nanocellulose membranes for enhanced removal of methylene blue dye

“…In all the membranes, the adsorption peaks characteristic to PES are observed at 710, 820, 1105, 1153, 1239, 1581, 1324, 1400, and 1477 cm −1 . These have been assigned to the CH 2 bond, CH stretching, CO stretching, SO stretching, aromatic ether stretching, benzene ring stretching, aromatic skeletal vibrations, and CH stretching, respectively 58–60 . The M1 blend spectra patterns appeared to be the same to those of M0 likely because of the similarity in some of chemical groups that make up their structures, with peaks between 1672 and 550 cm −1 possibly masking some characteristic peaks of PLA in that region.…”

“…These have been assigned to the CH 2 bond, C H stretching, C O stretching, S O stretching, aromatic ether stretching, benzene ring stretching, aromatic skeletal vibrations, and C H stretching, respectively. [58][59][60] The M1 blend spectra patterns appeared to be the same to those of M0 likely because of the similarity in some of chemical groups that make up their structures, with peaks between 1672 and 550 cm À1 possibly masking some characteristic peaks of PLA in that region. Peaks at 1745, 1452, and 1080 cm À1 have been assigned to C O stretching, C H stretching, and C O C stretching of PLA respectively, while peaks between 3000 and 3600 cm À1 are indicative of O H stretch.…”

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

“…Since the removal of dyes from solutions is of the utmost interest, future trends may be focused in: i) the development of more stable nanomaterials to be used in cycles (a general rule observed in this review is that there is a loss of efficiency with continuous cycles), ii) investigations of the use of nanomaterials on real dye-bearing wastes (in this review just only two, [58] and [171], references use industrial wastewaters in the investigation, iii) the use of dynamic conditions (columns) in the removal of dyes, and iv) a reliable knowledge about the easiness and costs to fabricate the nanomaterials in a greater scales than laboratory one. All the above will be key-points to understand the performance of the nanomaterials in the selected technology under long-term use.…”

“…Graphene oxide-copper oxide (GO-CuO) nanomaterial had been incorporated into celluloseacetate (CA) and poly-ether sulfone (PES) blend polymer by using phase inversion process to fabricate thin film nanocomposite (TFN) membranes, which were used on the removal of Methylene Blue, Rhodamine B, Methyl Orange and Congo Red [171]. In equilibrium conditions, the composite membrane removed 92%, 89%, 59% and 68% of the above respective dyes; thus, the TFN membrane seemed to be more effective to remove cationic dyes than anionic ones.…”