Abstract
The aim of present research is to removal of Pb (II) and Hg (II) heavy metal ions from aqueous solution using a nano-TiO2-phenol-formaldehyde composite resin (TPFR). The resulting adsorbent TPFR was characterized by SEM with EDS, BET, FT-IR, XRD and TGA analyses and tested for metal adsorption. The particle size of adsorbent was 65- 70 μ. The adsorption behavior of Pb (II) and Hg (II) ions from aqueous solution by TPFR was investigated as a function of some parameters such as initial metal ion concentration, contact time, dose and temperature. Adsorption equilibrium data for the removal of Pb (II) and Hg (II) ions were examined by various isotherm models. Kinetic studies indicated that Pb (II) and Hg (II) ions adsorption followed the pseudo-second-order model. The thermodynamics parameters of adsorption systems indicated spontaneous and endothermic process
Highlights
Pollution from heavy metal ions has become a serious problem for human health and for environment
TiO2-phenol-formaldehyde composite resin (TPFR) composite resin had high removal efficiency than PFR resin and TiO2 due to high surface area and more exposed active sites resulted in high metal ion adsorption
The present study reported the mechanism of adsorption of Hg (II) and Pb (II) onto nanoTPFR prepared via polymerization method
Summary
Pollution from heavy metal ions has become a serious problem for human health and for environment. Few natural sources are concerned for lead existence, such as soil-erosion, volcanic emissions, mining, but industrial activities delivered about 90% of lead into environment, where lead-containing dust particles are significantly polluted the air as well as soils [4,5]. Because of their high solubility in the aquatic environments, heavy metals can be absorbed by living organisms. Once they enter the food chain, large concentrations of heavy metals may accumulate in the human body. Mercury has very tendency of binding with proteins and it mainly affects the renal and nervous systems [7]
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