Ecofriendly nanoparticles derived from water industry byproducts for effective removal of Cu (II) from wastewater: Adsorption isotherms and kinetics

Water Treatment Residual nanoparticles (nWTR) has been identified as an adsorbent for the efficient elimination of copper (II) from wastewater. Adsorption pa-rameters pH, dosage, contact time, initial concentration, and temperature were assessed to detect the optimum adsorption conditions for purification contaminated wastewater. The equilibrium between liquid and solid phase occurred rapidly after (120 min). nWTR was found to have high adsorption capacity for Cu (II). From Langmuir isotherm, the adsorption capacity for Cu (II) was 71.9 mg g(-1), which is about 3.7 times higher than that of bulk particles of WTR. The kinetics data for Cu (II) adsorption followed the pseudo-first-order kinetics. The thermodynamic parameters investigated the spontaneous and endothermic nature of the Cu (II) adsorption activity. High removal percentage (91 %) was obtained after five cycles of reusing nWTR indicating the capability of using the sorbent more than four times.

Automated summary

Water Treatment Residual nanoparticles (nWTR) have been identified as an efficient adsorbent for the removal of copper (II) from wastewater. The optimal adsorption conditions were determined, and it was found that nWTR has a high adsorption capacity for Cu (II). The study also demonstrated that nWTR can be reused for more than four cycles with a high removal percentage.