pb(II) ion Removal from contaminated water samples using a New Nanopolymer by spectrophotometric technique

Abstract

This study involved the preparation of a new nanopolymer with outstanding environmental properties and high stability. The polymer was manufactured through a copolymerization process involving hydrophilic and hydrophobic monomers. The starting materials used were acrylic acid (AA), methyl cellulose (MC), and polylactic acid (PLA).To achieve the nanopolymerization, a free-radical photopolymerization method was employed. This process involved the polymerization of methyl cellulose, acrylic acid, and polylactic acid, with 1,6-hexanediol diacrylate (HDODA) as a cross-linking agent and 1-hydroxycyclohexylphenyl ketone as a photoinitiator.The resulting nanopolymer combines the properties of the starting materials, demonstrating its high environmental friendliness and structural stability. This makes it a promising candidate for applications requiring high-performance and sustainable materials. The nanopolymer was characterized using FTIR, TGA, DSC, SEM, and TEM techniques. The swelling ratio of this polymer was measured as a type of gel polymer. The study applied the nanopolymer to the spectroscopic determination of lead(II) ions. The optimal conditions for the determination process were determined, such as determining the wavelength of maximum absorption. A spectroscopic reference method was used to calculate the remaining ion using a new standard method for estimating the ion is characterized by the use of the reagent (2-[(6-Methoxy-2-benzothiazolyl) azo]-4-methoxyphenol)  6-MBTAMP at a wavelength of 670 nm, pH 7, reagent volume of 0.5 ml, and ion volume of 2 ml. A standard calibration curve for the lead(II) complex was also prepared before adsorption. Studying the best conditions for the adsorption process and estimating the effect of pH, shaking time, mass of the adsorbed surface, and volume of the  ion solution on the adsorption process. A calibration curve was also prepared after the adsorption process to estimate the remaining lead(II) ions. Linearity range was 0.5 to 10 mg.L^-1, and  Sandell's sensitivity was 0.1666 µg.cm^-2, molar absorptivity( Ƹ ) was 1.2432×10³L.mol^-1.cm^-1.