Sustainable recovery of copper from wastewater via zinc cementation enhanced by natural chalcone-based accelerators.

This study presents an eco-friendly strategy to enhance copper ion recovery from industrial wastewater through zinc cementation, utilizing natural chalcone-derived pyrazolo-quinoxaline compounds as organic accelerators. These bio-based additives notably improve recovery efficiency by promoting dendritic copper deposition, which enhances surface reactivity and mass transfer rates. For the first time, this research combines quantum chemical analysis with a dimensionless model (Sh = 0.

Cellulose acetate-based dual-layer nanofibrous composite membranes for desalination by membrane distillation.

Desalination has emerged as a key solution to the growing global demand for clean water. Membrane distillation (MD) has gained increasing attention due to its ability to treat hypersaline and complex wastewater using low-grade thermal energy. However, MD membranes continue to face performance challenges, particularly low permeate flux and limited resistance to pore wetting.

Marine algae-mediated PVDF/ZnO nanocomposite ultrafiltration membranes: superior performance in Cr(VI) removal from aqueous solutions.

Nano-membrane technology continues to expand its role in water purification. However, this technological advancement faces significant challenges, such as potential toxicity issues and membrane fouling, necessitating the development of sustainable and environmentally benign filtration solutions. In the present study, zinc oxide nanoparticles (ZnO NPs) derived from blue-green algae Arthrospira platensis were used in fabrication of polyvinylidene fluoride (PVDF) ultrafiltration (UF) nanocomposite membranes for the removal of Chromium (VI).

Biodegradable cellulose nanocrystals hydrogels for removal of acid red 8 dye from aqueous solutions.

Biodegradable cellulose nanocrystals hydrogels (CNCsH) were synthesized from cellulose nanocrystals (CNCs) which were prepared from office wastepaper (OWP) by a chemical crosslinking method using epicholorohydrin (ECH) as a cross-linker. CNCsH were tested for their swelling behavior and biodegradability and the point of zero charge had been determined. The ability of CNCsH for removing the Acid Red 8 (AR8) anionic dye from its aqueous solution was evaluated.