Removal of reactive dye brilliant red HE-3B from aqueous solutions by hydrolyzed polyacrylonitrile fibres: equilibrium and kinetics modelling

Preparation and adsorption behavior of diethylenetriamine/polyacrylonitrile composite nanofibers for a direct dye removal

“…This roughness and increasing in nanofibers diameter occurred by alkali treatment and further diffusion within the composite matrix. This result is also observed by other researchers [15,26]. Table 1 showed the TOC analysis result of fixed and unfixed composite fibers after immersing in distilled water.…”

Separation of oil from oily wastewater by sorption and coalescence technique using ethanol grafted polyacrylonitrile

“…It can be seen from the spectrum of the MPANF without hydrolysis (Fig. 2b) that the intensity of the peak at 3454 cm −1 had increased greatly, suggesting possi- [13,20,21]. The new N-H bonds may be produced during alcoholysis of nitrile groups to imidate esters.…”

Removal of tartrazine from aqueous solutions by strongly basic polystyrene anion exchange resins

“…Today there are more than 10,000 dyes commercially available and the estimates indicate that about 10-15 % of synthetic dyes used are lost in waste streams during the processing operations [1,[5][6][7][8]. Strongly coloured effluents not only create environmental and aesthetic problems, but can also affect the aquatic life and food web as most of them are mutagenic and carcinogenic [5].…”

“…Dyes represent a very important group of water pollutants which appear in the effluents discharged from textile, leather, food processing, paper and dye manufacturing industries [1][2][3][4][5]. Today there are more than 10,000 dyes commercially available and the estimates indicate that about 10-15 % of synthetic dyes used are lost in waste streams during the processing operations [1,[5][6][7][8].…”