Adsorption of iron and zinc on commercial activated carbon

摘要

Commercial activated carbon from local wood was investigated as a suitable adsorbent for the removal of heavy metal ions such as zinc and iron from synthetic and industrial wastewater through batch adsorption process. The initial and final concentrations were determined by absorption atomic spectrometer (AAS). The models of Langmuir and Freundlich were applied to describe adsorption, and Langmuir model is more appropriate to represent the experimental equilibrium. The maximum adsorption capacities of Zn2+and Fe2+calculated by the Langmuir model were respectively 15 and 31 mg/g, with synthetic solution at an initial Zn2+and Fe2+concentration of 5 mg /L. The removal of Zn2+and Fe2+from wastewater was around 70%