sanarya thamer naser

The modification of carbon from Nut shell was done via carbonization at 500 °C and activated under acidic conditions with H3PO4. Thus, Nutshell (NS) and chemically activated carbon utilizing acid H3PO4, the biochar surface will be referred to as NS-H3P will exhibit comparable capacity in removing BB dye compared to commercial activated carbon (CAC). The NS-H3P adsorbent has been characterized by field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscope (TEM). Effect of several factors like equilibrium time (5-60 min), the weight of adsorbent (0.01-0.08 g), the concentration of dye (10 -50 mg/L), pH solution (2.8-10.3), and solution of temperature (10-45 oC) were investigated. The equilibrium result tends to fit best with isotherm Freundlich than isotherm Langmuir. The isotherm Freundlich model with a high R2 was utilized to describe multi-layer adsorption. Desorption of dye studies was performed with NaOH, HCl, and H2O. Computational modeling was performed to obtain deeper mechanistic insights on the adsorption behavior of the BB dye molecules onto (002) sheet of Biochar. This modeling section includes Monte Carlo space exploration for the lowest adsorption energy configurations of the BB dye molecule on the Biochar surface. The process included an adsorption locator calculations module.

This study involved the synthesis of a new polymer hydrogel cross-linked through free radical copolymerization of chitosan, itaconic acid, and acrylamide (AM) to be chitosan-g-P (ITA-co-AM) hydrogel. The hydrogel was characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission electron microscopy (TEM), and X-ray diffraction (XRD) analysis. The metformin (MET) drug was removed from an aqueous solution using chitosan-g-P (ITA-co-AM) hydrogel. The factors influencing adsorption, such as adsorbent dose, contact time, concentration, and solution pH, were examined. These hydrogel composites were engineered to enable effective MET drug adsorption from wastewater. The adsorption of chitosan-g-P (ITA-co-AM) hydrogel was clarified by the kinetics process of the pseudo-first-order and pseudo-second-order and the isotherm analysis that was performed by the models (Langmuir, Temkin, and Freundlich). The results showed that the removal of drug by hydrogel closely applies to the Langmuir model with a correlation coefficient (R2 =0.998) and the maximum removal adsorption is 89.44% (20 mg/g at 25 °C). The correlation coefficient (R2 = 0.9905) of the pseudo-second-order model fit well with metformin drug the removal procedure was a multilayer process under the control of physisorption, according to adsorption kinetics. Moreover, after six cycles adsorption-desorption, the chitosan-g-P (ITA-co-AM) hydrogel has an adsorption efficiency of 70.88%. As a result, chitosan-g-P (ITA-co-AM) hydrogel is suitable for eliminating toxic drug contaminants.