​​​​​​International Journal of Modern Science and Technology, Vol. 2, No. 9, 2017, Pages 311-317. 

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​Heavy Metal Removal and Dye Decolourization by Adsorption using Mangifera indica  

C. Gomadurai¹,*, S.Vaishnavi², L. Dharani³
¹,³Department of Chemical Engineering, Kongu Engineering College, Erode, Tamilnadu – 638 060. India.
²Department of Petrochemical Engineering, RVS College of Engineering, Coimbatore, Tamilnadu – 641 402. India.
​​​*Corresponding author’s e-mail: cgomadurai@gmail.com

​Abstract
The removal of heavy metal (Cu) and decolourisation of dye (Congo red, acid violet, reactive yellow) from aqueous solution using an adsorbent prepared from Mango leaf was investigated in this study. The influence of time of mechanical shaking, mass of adsorbent (0.5, 1, 1.5,2 mg), initial pH, initial concentration (2000, 1500, 1000,500,250 mg/L) on adsorption has been evaluated. It is shown that adsorbent prepared from Mango leaf powder has a relatively high adsorption capacity for these adsorbates. For 500 mg/L of solution prepared, the percentage of decolourisation for 2 g of adsorbent and 1 hour of mechanical shaking was found to be   39.4%   for the metal, and 41.4, 50.9 and 22.7% for Congo red, acid violet, reactive yellow, respectively. All the experiments were carried out at normal room temperature (25 -28 ºC) and neutral pH.  A set of readings taken by varying pH shows that the adsorption capacity is also influenced by pH. Of the two kinds of adsorbent prepared, adsorbent prepared by oven drying is found to be more effective than adsorbent by natural drying. A kinetic models applied to the adsorption by mango leaf powder was evaluated and it was found that the equilibrium data were well described by Type-I adsorption model.

Keywords: Adsorption; Heavy metal; Dye; Decolourization; Mango leaf. 

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International Journal of Modern Science and Technology

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ISSN 2456-0235