The effectiveness of the activated carbon from coconut shell and corn cob to adsorb Pb(II) ion and it’s analysis using solid-phase spectrophotometry

Abstract

Abstract This research aimed to know the mass ratio of adsorbent combination of activated carbon from coconut shell and corn cob to adsorb Pb(II) ion and it’s analysis using the solid-phase spectrophotometry (SPS). The technique of data collection is carried out by several stages, which are: (1) the production of carbonated coconut shell and corn cob using muffle furnace at a temperature of 350 °C for 60 minutes; (2) the activation of the coconut shell carbon using ZnCl2 15% activator and the corn cob carbon using HCl 1M, (3) contacting this adsorbent combination between activated carbon from coconut shell and corn cob for 20 mL of liquid simulations waste Pb(II) ion on variations ratio of 1:0; 0:1; 1:1; 2:1; 1:2; (4) the analysis levels of Pb(II) using SPS; (5) the characterization of adsorbents in the most optimum combination between activated carbon of coconut shell and corn cob using FTIR. The results showed that the adsorbent can increase the capabilities and the effectiveness of the absorption to Pb(II) ion and the optimum ratio from the comparison between coconut shell and corn cob is 1:2 with the absorption ability to adsorb Pb(II) ion in the simulations waste is 86.78%. SPS is an effective method with high sensitivity in the level of μg/L and the limit of detection (LoD) of 0.06 μg/L.