Wastewater depollution of textile dyes and antibiotics using unmodified and copper oxide/zinc oxide nanofunctionalised graphene oxide materials

Abstract

GO, CuO-rGO and ZnO-rGO were tested for their ability to remove textile dyes (R-6G, MG) and antibiotics (AMOX, TC) as wastewater depollution materials. Although GO was most effective for the cationic dyes, CuO-rGO efficiently removed anionic antibiotics.

A starch based sustainable bio-hybrid composite for surface assimilation of methylene blue: preparation, characterization, and adsorption study

“…This observation is due to the contribution of electrostatic repulsion between the dye molecules and adsorbent surface as well as saturated adsorbent sites. 4,16,55 The obtained results are in accordance with the work of Esvandi et al 16 for adsorption of dye molecules on clay/magnetic starch adsorbent.…”

“…Similar findings have been reported for adsorption of foreign materials on different adsorbents. 3,4,19…”

“…A similar trend in pH has been observed previously for similar composites. 4,16,17,19,29,42,54 Another important factor that affects adsorption is the adsorbent dosage. This was studied by varying the composite amounts from 0.05 to 0.5 g in the solution containing MB (Fig.…”

“…2 More importantly, the presence of organic dyes that are non-biodegradable and carcinogenic in nature poses a grave threat to mankind. 3,4 Thus, it becomes imperative to monitor the dyes discharged from the textile industry which contribute up to 15% of dye effluents. 2 It is worth mentioning that various prominent techniques such as ion exchange, 5 flocculation, 6 reverse osmosis, 7 co-precipitation, 8 ultrafiltration, 9 solvent extraction 10 and oxidation 11–13 have been used to address the problem of waste water treatment.…”

Polyurea Membrane as potential purifying technology for Water Cleaning: Kinetic and Equilibrium Modeling of Dyes Adsorption

“…It can also disrupt aquatic ecosystems, as many dyes are not easily biodegradable, and can become trapped in the environment. In addition, dye molecules, which are often toxic, can cause damage to aquatic life or other organisms that come into contact with them [4].…”