Open AccessAdsorption Capacity of Activated Charcoal Made of Rice Husk on Cd(II) Metal Ions
Author(s) -
Eka Widyasari,
Supriadi Supriadi,
Irwan Said
Publication year - 2021
Publication title -
jurnal akademika kimia
Language(s) - English
Resource type - Journals
ISSN - 2477-5185
DOI - 10.22487/j24775185.2021.v10.i4.pp213-218
Subject(s) - adsorption , husk , activated charcoal , langmuir adsorption model , metal ions in aqueous solution , chemistry , charcoal , activated carbon , metal , nuclear chemistry , absorption (acoustics) , inorganic chemistry , chromatography , materials science , organic chemistry , botany , composite material , biology
Rice husk is one of the by-products of the rice milling process that can be used as activated charcoal to adsorb metal ions. This study aimed to determine the optimum pH and adsorption capacity of Cd(II) ions by activated charcoal made of rice husk using the Atomic Absorption Spectrophotometry (AAS) method. Determination of the optimum pH adsorption of activated charcoal was carried out by varying the pH of 2, 3, 4, 5, 6, 7, and 8. Based on the analysis results of the optimum pH for metal adsorption, pH 7 with percent absorbed metal 99.94%, while adsorption of Cd(II) ions using activated charcoal was carried out with several variations of concentration to study adsorption isotherm. The adsorption isotherm model of activated charcoal adsorption followed the Langmuir isotherm model. The results of this analysis obtained that the maximum adsorption capacity (qmax) of Cd(II) ions were 2.068 mg Cd/g.