Jornal de termodinâmica e catálise
Acesso livre

Abstrato

Adsorption of Lead (II), Cobalt (II) and Iron (II) From Aqueous Solution by Activated Carbon Prepared From White Lupine (GIBITO) HSUK

Getasew Ketsela*, Zenaw Animen, Alemu Talema

One of the main environmental problems is the contamination of water by heavy metals. There are different methods for removing toxic metals from wastewater such as membrane filtration, electrochemical precipitation, photochemical oxidation, coagulation, fertilization, adsorption and ion exchange methods. Nevertheless, based on environmentally friendly, easy to operate and cost-effectiveness adsorption technique is very important as it compared to other technique according to different studies. The investigation and use of low-cost and eco-friendly adsorbents is better to avoid expensive methods of removing Pb (II), Co (II) and Fe (II) from aqueous solution. This study explores feasibility of using AC from WLH is an agricultural waste for removal of each metal ion from aqueous solution of industrial wastewater. AC was prepared from WLH with Furnace. The moisture content, ash content, volatile matter and carbon content are characterized by different physical and chemical properties. The properties of initial concentration, adsorbent dose, shaking time, temperature and effect of pH on adsorption efficiency were examined; therefore the removal efficiency of Pb (II), Co (II) and Fe (II) was 91.9, 90.36 and 90.28% respectively. UV-Visible spectrophotometer technique was used for determining the concentration of heavy metal ions before and after adsorption. Adsorption isotherm was also studied using Langmuir and Freundlich, the experimental results have been fitted with the Freundlich isotherm model with higher correlation coefficients of R2= 0.981, 0.965 and 0.963 for Pb (II), Co (II) and Fe (II) respectively. Pseudo first-order and pseudo second-order models determined the adsorption kinetics but the adsorption process was fit pseudo second-order model.