EFEKTIVITAS ADSORPSI LOGAM PB2+ DAN CD2+ MENGGUNAKAN MEDIA ADSORBEN CANGKANG TELUR AYAM

An egg shells is the part of the egg which serves to provide protection for the components of the egg contents from damage because of physical, chemical and microbiological activity. Egg shells has 10,000-20,000 pores that are expected to absorb a solute and can be used as adsorbent to adsorb metals ion such as Pb2+ and Cd2+. The aims of this study were to examine the effectivity of chicken egg shells as adsorbent by variation of contacting time ie 15, 30, 45 mins and the difference in mass of adsorbent which are 3, 6 and 9 grams, as well as to determine the kinetics model of adsorption on metal ion of Pb2+ and Cd2+. This study begins with downsizing the size of chicken egg shells become to 200 mesh, then was performed a chemical activation by soaking the chicken egg shells with 0.1 M HCl. The adsorption was performed by contacting the adsorbent with a solution of the sample is based on the contacting time and mass of adsorbent, the concentration of the resulting solution adsorption then analyzed by AAS. The results showed that the % effectiveness adsorption of the Pb2+ highest that can be produced from chicken egg shells adsorbent that is 91.1242% by weight of 9 gram adsorbent by contacting time 15 mins, while on the adsorption Cd2+ can be produced from chicken egg shells adsorbent is 99.9515% on the weight of the adsorbent 9 grams with time contacting the 15 minutes. Pb2+ adsorption kinetics at 3, 6 and 9 grams following the second-order kinetic model, whereas the adsorption Cd2+ adsorption kinetics at 3 grams following the model zero-order kinetics.