Decolorizing of Malachite Green Dye by Adsorption Using Corn Leaves as Adsorbent Material

Omar Hisham Fadhel,Ziad Rafaa Zair,Mohammed Yaqob Eisa

doi:10.31026/j.eng.2021.02.01

Abstract

This paper presents the ability to use cheap adsorbent (corn leaf) for the removal of Malachite Green (MG) dye from its aqueous solution. A batch mode was used to study several factors, dye concentration (50-150) ppm, adsorbent dosage (0.5-2.5) g/L, contact time (1-4) day, pH (2-10), and temperature (30-60) The results indicated that the removal efficiency increases with the increase of adsorbent dosage and contact time, while inversely proportional to the increase in pH and temperature. An SEM device characterized the adsorbent corn leaves. The adsorption's resulting data were in agreement with Freundlich isotherm according to the regression analysis, and the kinetics data followed pseudo-first-order kinetic with a correlation coefficient of 0.9309. The thermodynamic data show that the process is exothermic and reversible. The highest removal of MG was 91%, which gave proof that the corn leaves as adsorbent material have the capability of adsorbing the MG dye for aqueous solutions

Highlights

The historic discovery of synthetic dye, Mauveine in 1856 led to an increase in the production of over 70x105 tones/year of synthetic dyes, which led to the replacement of natural dyes
The adsorption of dyes by bio-waste adsorbents had been studied by many researchers such as the adsorption of methyl orange by corn leaves (Fadhil and Eisa, 2019), rhodamine B by Aleurites Moluccana seeds (Postai et al, 2016), Congo red by Wheat husk (Abeer and Israa, 2019) Malachite green by algae (Al-taee, 2005), methylene blue by coconut leaves (Jawad et al, 2016), Malachite green by corn cob (Ismail et al, 2018), Malachite green by applewood shell (Tewari, Singhal and Arya, 2018), and Malachite green by wood apple shell (Sartape et al, 2017)
Increasing the concentration of the dye leads to an increase in removal efficiency very fast at the beginning due to the availability of free active sites

Summary

Introduction

The historic discovery of synthetic dye, Mauveine in 1856 led to an increase in the production of over 70x105 tones/year of synthetic dyes, which led to the replacement of natural dyes This increscent is mostly associated with water pollution, which causes several health hazards and severe problems to human health such as cancer, eye burns, vomiting, breathing problem, and diarrhea as described by (Geçgel et al, 2016). The major problem in the polluted and colored wastewater from the textile industries' final processing is that it includes traces of the dyes and reduces the quality of water resources. Since it contains complex aromatic molecular compounds, it must be treated before discharge to its assigned places (Chekwube and Dominic, 2017). The adsorption of dyes by bio-waste adsorbents had been studied by many researchers such as the adsorption of methyl orange by corn leaves (Fadhil and Eisa, 2019), rhodamine B by Aleurites Moluccana seeds (Postai et al, 2016), Congo red by Wheat husk (Abeer and Israa, 2019) Malachite green by algae (Al-taee, 2005), methylene blue by coconut leaves (Jawad et al, 2016), Malachite green by corn cob (Ismail et al, 2018), Malachite green by applewood shell (Tewari, Singhal and Arya, 2018), and Malachite green by wood apple shell (Sartape et al, 2017)

Objectives

Methods

Results