Utilization of red fruit’s peel (freycinetia arborea gaudich) as biochar for lead (Pb) adsorption

Abstract

Red fruit is a plant-like flower pandanus, which can be used as an ingredient in traditional medicine by the people of Papua. Red fruit also can be found in the mountains Petiro Rano surrounds Siuri Lake (a tourism object) in Poso-Indonesia. Peel of red fruit consist of cellulose and lignin so it can be utilized as biochar and used as the adsorbent of heavy metal such as Lead. The use of biochar as adsorbent can reduce pollution and improve soil pH and river containing heavy metals. This study utilized red fruit peel as biochar to adsorb Lead ions in water. The method used in this study was laboratory experiments and the analysis was using a Spectro Direct spectrophotometer. The finding showed that the biochar’s water content was 2.3%, ash content was 8.2% and biomass content was 89.5%, these results showed that the characteristic of biochar of red fruit peel was very good to use as adsorbent. The optimum weight of biochar that adsorbs Lead ions was 40 mg with the percentage of adsorption was 99,04%. While the optimum contact time of adsorption of Lead ion by biochar was 60 minutes with 98.98% percentage of absorption.