Heavy metals (Fe and Cd) adsorption by natural zeolite from laboratory liquid waste of Institut Pertanian (INTAN) Yogyakarta

摘要

This research aims to assist the manager of Integrated Laboratory of Agricultural Institute (INTAN) Yogyakarta in managing chemical liquid waste produced every year. This liquid waste comes from the remnants of analysis and basic chemistry practicum undertaken by students from each faculty. Controlling and managing the waste can reduce environment pollution risk. The method used in this research is the adsorption method by utilizing natural zeolite as an iron (Fe) and Cadmium (Cd) adsorbent. Natural Zeolite was first characterized by XRD (X-Ray Diffractometry), FT-IR (Fourier Transformer-Infra Red), and GSA (gas Sorption Analysis). In addition. The percentage adsorption was determined by AAS (Atomic Absorption Spectrometry) for the adsorption system as a function of zeolite weight. According to the studies, the increases of adsorbent is directly proportional to Cd removal and inversely to Fe removal.