Evaluation of the Performance of Ethylene Di-Amine Tetra-Acetic Acid Modified Activated Carbon for Lead ion Adsorption from Palm Kernel Shell
Y. Yerima *
Department of Chemical, Petroleum Engineering Igbinedion University, Okada, Nigeria.
I. Eiroboyi
Department of Chemical, Petroleum Engineering Igbinedion University, Okada, Nigeria.
W. A. Raji
Department of Chemical, Petroleum Engineering Igbinedion University, Okada, Nigeria.
Y. I. Osakue
Department of Chemical, Petroleum Engineering Igbinedion University, Okada, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
There is increasing research on the adsorption of lead because its use in industrial processes has resulted in various forms of environmental contamination and negative human health issues. Currently, researchers have intensified their search for low-cost adsorbents like activated carbon produced from nonfossil sources. This study is focused on the use of Ethylene Di-Amine Tetra-Acetic Acid for the adsorption of Lead ions. It was conducted to optimize the process variables in the production of Palm Kernel Shell Activated Carbon modified with Ethylene Di-Amine Tetra-Acetic Acid. A 23 three-level Central Composite Design was used to develop a statistical model for the optimization of the time (10-130) X1, pH (5.0 – 7.0) X2, and adsorbent dose (0.4 -5.0g)X3. Data obtained from RSM on activated carbon production were subjected to ANOVA and analyzed using a second-order polynomial equation. The extent of lead ion removal by Ethylene Di-Amine Tetra-Acetic Acid activated carbon from aqueous solution was 96.30% at the solution pH of 7.2, contact time of 70 minutes, and an adsorbent dose of 2.1g/L. The Langmuir isotherm model was in good agreement with the experimental data.
Keywords: Adsorption, optimization, activated carbon, palm kernel shell, response surface methodology, bioadsorbent, lead ion