PEMANFAATAN KULIT SINGKONG UNTUK MENGADSORPSI ION LOGAM TIMBAL (Pb)

ABSTRACT\ud \ud One of the problems that arise due to increasedhuman activityispollutedat the water sources. One of the pollutants is Lead (Pb). The existence ofLead(Pb) inbodywatercancause health problemsin humans. It is necessary to adsorption for reducing the impact. This research uses the leather waste from cassava as adsorben. This research aims to analyze the effect of increased adsorben mass andcontact time biosorption and the efficiency of lead adsorption using leather of cassava and to determine the optimum adsorptionwith adsorben mass variations and contact time. The process of the research is intregrating adsorben with artificial wastewater that concentration of lead is 10 ppm and mass of adsorbent are 1; 1,5; and 2 grams in 20, 40, 60, and 80 minutes. The result shows the increased mass of absorben cause the increased adsorption efficiency, although the adsorben mass in 2 grams is decreasing whereas ionsof adsorption is greater with increasing contact time. The optimum adsorption efficiency of each variation occurs at the contact time of 80 minutes with the sequential adsorption efficiency are 18.081%, 20.151% dan 19.414%. Based on three variationsconducted, the research obtain the optimum adsorption efficiency in 1.5 grams of adsorben mass and 80 minutes of contact time which the adsoption efficiency is 20.151%