Comparison Among Three Adsorbent Materials Al2O3/ Aloe vera Gum ‎Nanocomposites, Al2O3 Nanoparticles, and Fly Ash to Phosphate ‎Removal from Tigris River

Abstract

Modern, promising and environmentally friendly nanomaterials was used as adsorbent material, [AL₂O₃ Nanoparticles, loaded Aloe vera Gum]. It is a natural material that is secreted from the (Aloe vera plant) based nanocomposites using sol-gel method to increase the surface area to Phosphate removal.

Selectors within a range are dose of (Al₂O₃/AG) nanoparticles (20-100 mg), initial ion concentration (Ci) 3.7-10.7 mg/L. pH for solution 3,4,5,7, and 9, contact time 5-100 minutes, wavelength of light (yellow, white, red, green, blue, and sunlight), and magnetic field (MF) 300-500 mTesla. Batch experiments were conducted using The Hanna Phosphate High-Range Checker.

Results showed the best dose 60 mg, pH 5, wavelength red, contact time 100 min and C_i of PO₄^-3 at 7.6 mg/L. It is found that the Langmuir adsorption model fairly fits the experimental data; while the pseudo-second-order kinetic model fits the adsorption. The adsorption capacity is increased with the decrease of initial concentration of the pollutant (phosphate) and is directly proportional to the dose of Al₂O₃/AG nanocomposites adsorbent.

The best conditions obtained using Al₂O₃/AG is compared with fly ash and Al₂O₃ NPs. The surface area of Al₂O₃/AG nanocomposites was recorded as 124.255 m². g^-1. The best operating condition that gives the highest removal was used to test AL₂O₃ NPs and fly ash. It is proved that AL₂O₃/AG gives higher removal than that of AL₂O₃ NPs and fly ash.