Evaluation of Optimal Parameters for Lead(II) Ion Extraction Using a Newly Azo Organic Reagent via Cloud Point Extraction Method
DOI:
https://doi.org/10.36329/jkcm/2025/v4.i3.19633Keywords:
Azo reagent, lead(II), cloud point extraction.Abstract
A new organic reagent [3-((2-chloro-4-hydroxyphenyl) diazenyl)-5nitrobenzene-1,2-diol] (CHPDND) was prepared and characterized by (IR, HNMR, 13C-NMR, C.H.N) used for spectrophotometric determination of Pb(II) ions in aqueous solution. The maximum wavelength of organic reagent λmax=410nm and for its complex with Pb(II) was 395nm. The study includes all optimal parameters for Pb(II) ions extraction as chelation complex by cloud point method such as pHex, temperature in addition to calculate thermodynamic data ΔHex, ΔGex, and ΔSex, heating time, surfactant volume, etc. Slope analysis method used for determine the probable structure of Pb(II)- (CHPDND) complex was 1:1. Applied method for spectrophotometric determination of Pb(II) in some environmental samples with LOD=0.219mg/L and LOQ=0.664mg/L and the results compared with AAS as standard method.
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Copyright (c) 2025 Khadija Abdel-Ilah Ali Al-Saeedi, Safa Majeed Hameed, Hadeel Noori Saad
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