Orange Peel-Facilitated Adsorption of Methylene Blue Dye

Orange Peel-Facilitated Adsorption of Methylene Blue Dye

V. R. Chaudhari, Ajaygiri K. Goswami, Sunil Jayant Kulkarni
Copyright: © 2023 |Pages: 11
DOI: 10.4018/979-8-3693-1186-8.ch018
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Abstract

The current studies deal with the use of low-cost orange peels as an adsorbent for the removal of methylene blue from aqueous solution in the batch adsorption experiment in the laboratory. The adsorption of methylene blue dye on an orange peel was examined on the basis of different parameters such as dye concentration, quantity of adsorbent, particle size of orange peel, pH, and contact time between adsorbent and adsorbate. Also, effects of these parameters on adsorption were studied. The adsorption was favorable for acidic pH. Maximum adsorption takes place at pH 6. Also, the removal efficiency increases with adsorbent dosage. Adsorbent dosage of 0.5 g shows considerable dye removal. Dye color removal rate increases with increase in contact time between adsorbent and adsorbate. The Langmuir model fits better to the adsorption equilibrium data. The adsorption capacity of orange peel is quite low. Orange peel can be used as a substitute for expensive adsorbent as it is a cheap and bio adsorbent.
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2 Experimental Investigations

2.1 Adsorbent Preparation

In the present Research, Orange peel is used as Adsorbent. Normally Orange discards a huge amount of orange peels. These discarded peels from orange can be used in preparation of adsorbent for the removal of dyes. Orange peels are collected from the local areas of Jalgaon District from a fruit stall. The peels were washed thoroughly with deionized water to remove the adhering dirt and water-soluble particles. The collected peels were air dried in an oven at temperature (105þC) for 48 hours to remove moisture content. After drying process, the peels were ground to fine powder and sieved through 75, 150, 250 µ size.

2.2 Preparation of Dye Solution

The dye used in this study is methylene Blue, whose structure is as given below. The stock solution (10 ppm) was prepared by adding an accurately weighed quantity of the dye dissolved in distilled water. A solution used in the experiment for the desired concentration obtained by successive dilutions. The absorbance values were checked to determine the dye concentration before and after the experiment, at 652 nm with UV Visible Spectrometer. The pH of the solutions was adjusted by adding a small amount of HCl or NaOH solutions having concentration 0.1 M.

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