Study on Adsorpting Dyes Property of Carbon Nanotubes Reinforced Sodium Alginate Nanocomposites

This paper proposes a safe and simple nanocomposite preparation method to adsorb dyes. The environment friendly nanocomposite adsorbent CNTs/SA was prepared using carbon nanotubes (CNTs) and sodium alginate (SA) as raw materials. They were fabricated by a simple physical blending method, and then the uniform CNTs/SA nanocomposites were obtained by freeze-dried method. The achieved CNTs/SA nanocomposites were used to study the adsorption property of methylene blue. The experimental results showed that the adsorption ability of the nanocomposites increased with the increase of the amount of CNTs/SA nanocomposites. Furthermore, with the increase of contact time, the amount of adsorption of methylene blue also increased. The pH also had a certain influence on adsorption capacity, the higher pH, the better absorption ability. In addition, the adsorption rate is negatively correlated with temperature. The removal of methylene blue decreases with increasing temperature.