Lead(II) adsorption by biochar prepared from tanduk banana peels (Musa X Paradisiaca)

Processing organic waste for use in various sectors is one way to maintain zero-waste and preserve the environment. The banana plant is only a tropical fruit that bears fruit only once and leaves behind the stems, leaves, and banana peels. The use of banana peel as a lead adsorbent was conducted by processing banana peels into biochar. Biochar making a pyrolysis process where the temperature starts from 400°C, 450°C, and 500°C, produces 33.00%, 31.73%, and 29.07% biochar. The biochar moisture content was 12.26%, 11.13%, and 9.32%, while the ash content was 9.62%, 6.08%, and 4.64%, respectively. The ability of biochar to adsorb lead was measured by Atomic Adsorption Spectrophotometry (AAS) with various pH and biochar weight. The optimum adsorption of lead (II) obtained at pH 5 with an adsorption amount of 49.96 mg/g, and a biochar weight of 400 mg with an adsorption amount of 12.49 mg/g (paper)