Kajian Kemampuan Adsorpsi Logam Berat Kadmium (Cd2+) dengan Menggunakan Adsorben Dari Batang Jagung (Zea Mays)

Abstract

The idea of this research is to investigate adsorption capacity of corn stalk with different shapes to adsorp cadmium ion (Cd2+) 50 ppm dissolving in the solution on pH 4,5. The corn stalk variation shapes are square, half square, quarter square, 50 mesh and 70 mesh. Different shapes use to adsorp is 150, 220, and 250 rpm. This research consist of two main steps such as, pre treatment and batch adsorption to determine adsorption capacity and modeling of adsorption kinetic. The influence of the size of the corn stalks significantly affect the adsorption capacity of corn stalks with a rise of 60.89%, 67.45%, 79.95%, 80.75% and 85.00% for a round shape, ½ round, ¼ round, 50 mesh and 70 mesh respectivly for 2 hours adsorption operation. The effect of variation of stirring also able to increase the adsorption capacity but not too big. Adsorption kinetics model indicates adsorption occurs chemically. Models indicate that the adsorption kinetics of diffusion of metal ions adsorbed to the pores of the adsorbent. This shows that the adsorption capacity of corn stalks has potential as an adsorbent to absorb metal ions in solution