A Study of Isotherm and Kinetic Models of Methylene Blue and Methyl Orange Adsorption Using Indonesian Natural Zeolite and Agricultural Waste

Abstract

This study discusses the development of Indonesian natural zeolite and agricultural waste i.e bagasse ash and rice husk ash as natural adsorbents. These materials were used as an adsorbent for methyl orange and methylene blue adsorption for isotherm and kinetic study. Adsorption kinetic models for methyl orange and methylene blue with all adsorbents were a pseudo-second-order except methyl orange adsorption with bagasse ash adsorbent (MA) that followed pseudo-first-order. Isotherm models for all adsorption experiments were Langmuir type except methyl orange adsorption using rice husk adsorbent (MS) that followed Freundlich type.