Using Generation 3 Polyamidoamine Dendrimer (PAMAM G3)as adsorbent for the Removal of Pentavalent Arsenic fromAqueous Solutions

Arsenic is known as a carcinogenic compound in drinking water . It can cause acute and chronic effects on human health. In this study, the effect of polyamidoamine dendrimer generation 3(PAMAM G3) as adsorbents for removal of arsenic (V) from aqueous solutions was evaluated.
Adsorption experiment was studied in batch system and the effect of different variables like pH, contact time, concentrations of arsenic and adsorbent dosage on adsorption was studied. Therefore, absorption kinetics and equilibrium isotherms were determined.
The results showed that adsorption process is affected by some parameters such as initial concentration, adsorbent and contact time. The three models of isotherm included Langmuir, Freundlich and Dubinin- Radeshkuvich were studied that Freundlich and Langmuir isotherms were more compliant with results.
According to results, can be concluded that adsorption with dendrimer is an appropriate method with high efficiency for removal arsenic from aqueous solutions.