A study of electrochemical behavior for redox peaks of Pb(II) ions in human blood samples using Nanosensor

Abstract

The electrochemical method using cyclic voltammetrictechniquewas determined the effect ofhigh temperature on the redox current peaks of one of pollutant in an environment are lead ionsin vitro for humanblood medium. The present study showed the effect of different temperatureson the lead ions in blood medium by analysis cyclic voltammetric analysis and determinationthe chemical thermodynamic factors. It was usedmultiwall carbon nanotube (MWCNT) / glassycarbon electrode (GCE),modified working electrode (MWCNT/GCE) as a good sensor to detectionthe effect of different temperatures on the blood medium in presence of Pb(II) ions.The results was confirmed that oxidation and reduction current peak of Pb(II) ions at -(0.5)V and (0.11)V,respectively at low temperature (20)oCand monitoring the redox current peaksagainst increasing the temperature until (60)oC. It was found that the anodic current peak of leadions in blood medium was decreased with increasing temperature, but cathodic current peak wasenhanced about three times at high temperature (60) oC. Thus, the activation energy (E*) valueswere determined from Arrhenius equation for oxidative peak is (-15.541) kJ.mol-1.K-1and foranti-oxidative peak is (35.271) kJ.mol-1.K-1Other thermodynamic functions such as change inEnthalpy of activation (ΔH*), change in Gibbs of activation (ΔG*) and change in Entropy ofactivation (ΔS*) were determined byEyring equation. The results enhanced the blood of peoplepollutant with lead ions was significant affectedby environment or exposure with different sourceof high temperature such as workers in factories by complexation with the blood componentandcauses to precipitation of heavy metal (Pb) on the brain by the reduction process of Pb(II)/Pb(0)which may be causes different disease such asAlzheimer in adults or Autism in infants.