AUTHOR=Azeroual Sana , Khatib Khalid , Belfkira Ahmed , Ablouh El-Houssaine , Hanani Zouhair , Taourirte Moha , Jalal Rachid 

TITLE=A novel approach for adsorption of organic dyes from aqueous solutions using a sodium alginate/titanium dioxide nanowire doped with zirconium cryogel beads

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 12 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2024.1285230

DOI=10.3389/fchem.2024.1285230

ISSN=2296-2646

ABSTRACT=The presence of organic dyes in wastewater raises significant environmental and human health concerns owing to their high toxicity. In light of this, a novel adsorbent material with porous cryogel architecture was developed and employed for their effective removal of organic dyes from aqueous solution. initially, titanium dioxide nanowire doped with zirconium HZTO was synthesized by the hydrothermal process. subsequently, the beads (SA/HZTO) of sodium alginate and HZTO were successfully prepared through a cross-linking process, employing Ca 2+ ions as the crosslinking agent. Structural analysis of SA/HZTO beads was performed using FTIR, SEM and EDX techniques. We systematically examined the impact of different conditions, including initial dye concentration, pH, contact time, and adsorbent dosage, on the adsorption process. Batch experiments, both in signal and binary systems, were conducted to rigorously assess the dye adsorption capabilities. kinetic modeling revealed that the adsorption process adhered to the pseudo-second-order kinetic model. Remarkably, the prepared beads exhibited impressive adsorption capacities of 26 and 29 mg/g toward Methylene Blue (MB) and safranin (SF), respectively. SA/HZTO beads has been demonstrated excellent adsorption properties, offering a promising avenue for the development of low-cost, efficient and reusable adsorbent to remove dyes from wastewater.