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Papaya (Carica papaya L.) Leaf Powder: Novel Adsorbent for Removal of Methylene Blue from Aqueous Solution

Mukhlish, M. Zobayer and Khan, Maksudur R. and Sumona, Paul and Mithun, Chandra Bhoumick (2012) Papaya (Carica papaya L.) Leaf Powder: Novel Adsorbent for Removal of Methylene Blue from Aqueous Solution. Water, Air and Soil Pollution, 223 (8). pp. 4949-4958. ISSN 0049-6979 (print); 1573-2932 (online)

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Abstract

Batch sorption experiments were carried out to investigate the potentiality of papaya leaf powder (PLP) for the removal of methylene blue (MB) from aqueous solution. The effects of various experimental parameters, such as adsorbent dose, initial solution concentration, contact time, and solution pH were also studied. The amount of dye adsorbed was found to increase with increase in initial dye concentrations. Papaya leaf adsorbs MB better in basic medium. The adsorption equilibrium data fitted well in the Langmuir isotherm equation with a monolayer sorption capacity of 512.55 mg g−1. The kinetics of MB adsorption onto papaya leaf was examined using the pseudo-first and pseudo-second order and unified approach kinetic models. The adsorption kinetics followed the pseudo-second order kinetic model, but the rate constant was found to depend on initial dye concentration. The unified approach model described the equilibrium and kinetics well. The forward and backward rate constants were determined from the unified approach model.

Item Type: Article
Uncontrolled Keywords: Carica papaya - Methylene blue - Adsorption - Kinetics - Isotherm
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Ms. Nurul Amanina Lokman
Date Deposited: 22 Mar 2016 04:20
Last Modified: 16 Jan 2018 02:29
URI: http://umpir.ump.edu.my/id/eprint/12388
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