Adsorption of Reactive Dyes from Aqueous Solution Using Activated Carbon Prepared from Plantain Leaf Sheath Waste

Abstract

All parts of the plantain are widely used in India for various purposes. But plantain<br /> 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<br /> Green 19, and Reactive Red 141. Batch adsorption studies have been conducted and<br /> optimum adsorption conditions were determined as a function of contact time, initial dye<br /> concentration, adsorbent dosage, and pH. The experimental data were analyzed using<br /> Langmuir, Freundlich and Temkin isotherm models. The pseudo-first and second-order,<br /> intraparticle diffusion, and Elovich models were used to analyze the kinetic parameters<br /> of the adsorption system. Under the optimum conditions (initial dye concentration = 200<br /> mg L–1, adsorbent dose = 1 g, pH = 2, contact time = 220 min for reactive green 19 and<br /> 180 min for reactive red 141), maximum percentage removal for reactive green 19 and<br /> 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.

Adsorption of crystal violet on activated bamboo fiber powder from water: preparation, characterization, kinetics and isotherms

“…It was estimated that nearly 800 000 tons of artificial dyes were produced every year, causing serious water pollution. 3,4 Synthetic dyes from water can be eliminated using the membrane separation method, filtration, advanced oxidation method, 5 coagulation and flocculation, and photocatalytic degradation. 6 Laftani et al 7 used the sun-Fenton oxidation process to degrade Lichun red dye in water.…”