Open AccessAdsorption of Reactive Dyes from Aqueous Solution Using Activated Carbon Prepared from Plantain Leaf Sheath Waste
Author(s) -
G. Sangavi,
Argho Bakshi,
G. Mathangi,
Nandhini Devi G.
Publication year - 2020
Publication title -
chemical and biochemical engineering quarterly/chemical and biochemical engineering quarterly
Language(s) - English
Resource type - Journals
eISSN - 1846-5153
pISSN - 0352-9568
DOI - 10.15255/cabeq.2020.1826
Subject(s) - activated carbon , adsorption , chemistry , freundlich equation , reactive dye , nuclear chemistry , aqueous solution , langmuir , phosphoric acid , langmuir adsorption model , chromatography , organic chemistry , dyeing
All parts of the plantain are widely used in India for various purposes. But plantain leaf sheath always ends up as waste material which accumulates as a biowaste. The present study focuses on the preparation of activated carbon using phosphoric acid as activating agent, and its efficacy as an adsorbent for the removal of reactive dyes, Reactive Green 19, and Reactive Red 141. Batch adsorption studies have been conducted and optimum adsorption conditions were determined as a function of contact time, initial dye concentration, adsorbent dosage, and pH. The experimental data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The pseudo-first and second-order, intraparticle diffusion, and Elovich models were used to analyze the kinetic parameters of the adsorption system. Under the optimum conditions (initial dye concentration = 200 mg L–1, adsorbent dose = 1 g, pH = 2, contact time = 220 min for reactive green 19 and 180 min for reactive red 141), maximum percentage removal for reactive green 19 and reactive red 141 were obtained as 65.9 % and 72.7 %, respectively. The results demonstrate that activated carbon produced from chemical activation of the plantain waste has the potential of adsorbing reactive dyes from industrial effluents.