Daya Jerap dan Efisiensi Adsorpsi Ion Tembaga Menggunakan Biosorben Serat Daun Nanas (Ananas comosus)

Abstract

One of the essential heavy metals that living things require in small amounts is the copper ion (Cu2+). However, the presence of dissolved copper metal is toxic to organisms and can pollute the environment if it exceeds a predetermined threshold value. Pineapple leaf waste with high cellulose content can be used as a copper ion biosorbent. This research studied the effect of pineapple leaf fiber particle size and contact time at the adsorption of copper ions on the adsorption capacity and effectiveness of pineapple leaf fiber biosorbents in adsorbing copper ions. The research began with cleaning, drying, and grinding pineapple leaves. Then, the activation process was carried out for 70 minutes using 9% NaOH. The adsorption process of copper ions was carried out using 1 g of pineapple leaf fiber biosorbent based on the varying sizes of the biosorbent particles size of the biosorbent -40/+60; -60/+80; and -80/+100 mesh and contact time 30; 60; 90; and 120 minutes at a stirring speed of 90 rpm and a concentration of 10 ppm copper ion adsorbate to measure the remaining copper ions in solution after the adsorption process. The activated pineapple leaf fiber biosorbent has a water content of 14.3%; 12.4%; and 11.2% for each biosorbent particle size -40/+60; -60/+80; and -80/+100 meshes. The highest adsorption effectiveness was 94.93%, which occurred at a contact time of 90 minutes with a biosorbent particle size of -80/+100 mesh and an adsorption value of 0.94 mg/g.