Investigation of graphene/CNT hybrid structural effect on absorption of Mn2+ by activated carbon

In this paper, an effort is made to improve the adsorption amount by adding graphene/CNT hybrid in the structure of activated carbon (AC) for removing manganese ions from aqueous solutions. The bonding G/CNT hybrid with activated carbon creates a structure which is an excellent absorbent for removing some heavy metal ions. Therefore, a comparison between the performance increasing ion adsorption and AC results as the blank adsorbent was made. Moreover, the influence of time, pH solution, initial concentration of Mn2+, and temperature investigated as experimental conditions. Finally, the maximum adsorption was 89.38% and 96.18% for AC and AC/G/CNT composite respectively at 30 min, initial concentration of 30 mgL-1, pH=4.5 in 15 °C for both adsorbents. Finally, the results showed that under the same conditions, the presence of G/CNT hybrid in the structure of AC increased the amount of adsorption by 7.5%.

Keywords:

Adsorption , Manganese , Activated Carbon , Graphene , CNT , Hybrid ,