Activated carbon (palm leaf): low-cost sorbents, successfully used for dye adsorption from wastewater preparation of palm leaf, obtained from the grower in Iraq and dry in sunlight and im-pregnated to 3% HNO3 and then dried for 24 hours at 90°C. The adsorption was proved via way of utilizing the (FTIR) and (FE-SEM) analysis, it was observed that there is no change in the beam before and after adsorption only shifts in intensity, evidence of physical adsorption, and FESEM appear image before adsorption contains many smaller granules that are not clustered together and spread on the surface, but after the adsorption we notice the swelling of these particles and they form irregular clusters, evidence of loading the dye inside these granules, which led to swelling. The kinetic model experimental result was carried out via two models fi rst and second order, utilized to describe the adsorption process. Second model kinetic by greater than R2= 0.9864. The study discusses the thermodynamic Factors having changes in enthalpy, entropy, and Gibbs free energy. Through the results, it was found that the adsorption process is an endothermic and spontaneous reaction.
In this research, preparation of methacrylic acid-acrylamide based ZnO hydrogel nanocomposite (MAA-AM)/ZnO hydrogel nanocomposite by way of co-polymerization via used acrylate acid (AA) (or acrylate salt) (AA) or methacrylic acid (MAA)) and acrylamide (AM). Nanocomposites based on acrylate are characterized via being hydrophilic and able to retain water. Nanocomposite properties were studied using different techniques (FE-SEM, TEM, and EDX). The photocatalytic degradation of methylene blue MB dye under different conditions was studied using nanocomposite like time of irradiation, mass of catalyst (MAA- AM)/ZnO hydrogel nanocomposite, initial MB dye concentration onto photocatalytic degradation and reactivation were studied. The result increases the photocatalytic degradation with the rise weight of catalyst (MAA- AM)/ZnO hydrogel nanocomposite range (0.1–0.25 g). Too, a decrease in photocatalytic degradation was observed with an increase in MB. Observed that after reuse, ((MAA- AM)/ZnO) nanocomposite hydrogel appear photocatalytic efficiency from of the use 1 to 6 cycle 87.88 to 58.87%, showing that ((MAA- AM)/ZnO hydrogel nanocomposite surface appear good stability.
A simple, fast, sensitive and selective spectrophotometric method has been developed based on the oxidative coupling reaction process, which depends on the determination of clonazepam (CZP) drug using an oxidizing agent sodium periodate (NaIO4) in the presence of a reagent, phenylephrine hydrochloride (PH-HCL), that uses the pink color of CZP at a wavelength of 495 nm. Where several factors aff ecting the color intensity and absorbance were studied, including the eff ect of color stability time, eff ect of the volume of the reagent, the eff ect of the volume of the oxidizing agent, order of addition and temperature. The calibration curve found to obey Lambert beer at range concentration (2–20 mg/L), while the limit of detection (LoD) (8. 9*10-2), limit of quantitation (LoQ) (2.6*10-2) and molar absorbance is 1.4 × 102 liters mol-1cm-1. The method was applied to pharmaceutical preparations (Tablet) and was found to characterize the best precision and accuracy. The standard methods not need any control of temperature and also not aff ected by interferences and henceforth successfully utilized to determine CZP in pharmaceutical preparations
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