Application of poly (propyleneimine) dendrimer for removal of toxic metals
2018
Maleki, Afshin | Shahmoradi, Behzad | Rezaee, Reza | Ebrahimi, Roya | Hayati, Bagher | Safari, Mahdi
Cadmium (Cd2+) and nickel (Ni2+) are the most generally heavy metal ions in the different industry. They are known as the common contaminant that it’s discharged into the water source and due to their excessive toxicity even at low concentrations, can cause serious risks to the ecosystem. A new adsorbent poly propyleneimine dendrimer (PPI, G2) was applied for the uptake of Ni2+ and Cd2+ ions from liquid phase. The effective parameters containing pH, PPI dosage and initial concentration of Ni2+ and Cd2+ ions were investigated in a batch model. Effect of pH and adsorbent dosage showed that by increasing of them values, the amount of metal ion removal increased, also, by increasing the concentration of metal ions, the percentage of metal adsorption were reduced. To study the mechanism of adsorption and calculate maximum values of adsorption, the Langmuir and Freundlich isotherm were used. The results showed that the removal of heavy metals by the PPI dendrimer fit the Langmuir isotherm. It is concluded that PPI dendrimer is a super adsorbent for Ni2+ and Pb2+ removal from aqueous solutions.
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