efficacious remediation of methylene blue (mb) and crystal violet (cv) from aquatic environment using magnetic hydrogel halloysite nanotubes

A magnetic gelatin/pectin (ge/pec) halloysite nanotubes (hnts) (ge/pec-hnts@ionp) based on a magnetic hydrogel halloysite nanotubes adsorbent in two steps including the fabrication of ge/pec hydrogel, modifications ge/pec glutaraldehyde (crosslinking agent), then used halloysite nanotubes (hnts) and the in-situ magnetization of the ge/pec-hnts to obtain ge/pec-hnts@ionp magnetic hydrogel halloysite nanotubes. the physicochemical properties of the material were investigated using various analyses, including ft-ir, bet (surface area (35.244 m2.g-1), pore volume (0.0690 cm3.g-1), and pore size (7.83285nm)), vsm (14.51 emu.g-1), xrd, fe-sem, edx, and tga (about 78% of its weight has been preserved. the ge/pec-hnts@ionp magnetic hydrogel halloysite nanotube efficiencies in adsorption were investigated in methylene blue (mb) and crystal violet (cv) from an aqueous environment. the factors affecting the absorption process to assess the effectiveness include ph (4-10), adsorbent dosage (0.003-0.03g), duration time (5-30 min), and beginning pollutants concentration (25-150 ppm). the freundlich isotherm model fitted the experimental adsorption data, and the pseudo-second-order (pso) model described adsorption kinetics for both cationic dyes well. the composite also exhibited reusability in the best available conditions for eliminating cationic dyes, with no significant decrease in adsorption capacity after three use cycles.