Utilization of Ketapang Seed Shells in Reducing Pb(NO3)2 Metal Levels by Adsorption Process

Lead is a heavy metal that is dangerous if it enters the environment through industrial waste, mining, waste from the electroplating process, burning fuel oil and so on which is carried by streams. Therefore, it is necessary to limit the lead metal content. Efforts to reduce the impact of lead metal pollution can be done in several ways, one of which is by adsorption using adsorbents. Adsorption has been proven to be a fairly effective method for treating liquid waste and is the most commonly used method because it has a simpler concept and can be regenerated and is economical. One of the natural resources around us that contains cellulose that is not utilized is the outer shell of ketapang seeds. The outer shell of ketapang seeds which contains cellulose is a good alternative for utilizing this waste so as not to pollute the environment. To reduce lead metal levels, you can use a natural adsorbent from activated charcoal on the outer shell of ketapang seeds. The adsorption process uses activated charcoal adsorbent, which is one of the most frequently used non-polar adsorbents because it has better adsorption power and surface area than other types of adsorbent. This research
aims to determine the variables that influence and the optimum conditions for natural adsorbents from activated charcoal in the outer shell of Ketapang seeds to reduce Pb(NO3)2 metal levels. The research method used is an experimental method with a two-level factorial design. The research results showed that adsorption temperature was the most influential variable in this research with an optimum yield
presentation of 66.77%. The activated charcoal produced has a water content of 8%, an ash content of 5.2% and a methylene blue absorption capacity of 698 mg/g