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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/NMsB/13
Adsorptive removal of navy blue and congo red dyes from wastewater using
nanocomposites of moringa oleifera biosorbent

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Mustanser Hussain , Muhammad Mohsin Iqbal , Dr. Muhammad Sajjad , Dr. Muhammad
Imran 1*, Muhammad Asif Naeem 1
1 Department of Environmental Sciences, COMSATS University Islamabad, Vehari- Campus,
61100 Pakistan
Correspondence: imranrb@cuivehari.edu.pk

Abstract
Direct disposal of industrial effluents into surface water bodies adversely affects the quality of
water. These effluents contain textile dyes like Congo Red (CR), and Navy blue (NB) which
are very toxic for humans and animals. Therefore, the present study aims to evaluate the
potential of Moringa oleifera pods (MP) and leaves (ML), and their nanocomposites with zinc
oxide and magnetite nanoparticles (MP/ZnO, MP/MNPs, ML/ZnO and ML/MNPs) for the
removal of CR and NB from contaminated water. The order of CR removal from contaminated
water was ML/MNPs>ML/ZnO>ML (98, 95, and 86%) with respect to initial concentration of
dye. Similar pattern of dye removal was observed with MP and its composites (MP/ZnO and
MP/MNPs). But the NB removal order from contaminated water was
ML/ZnO>ML/MNPs>ML (98, 95, and 39%) when initial concentration of NB was varied. The
experimental results were validated with equilibrium (Langmuir and Freundlich) and kinetic
(Pseudo first and Pseudo second order) models. Freundlich and Pseudo second order model
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well explained the equilibrium and kinetic adsorption (R ≥0.98). It is concluded that
nanocomposites of ML and MP are very effective for the removal of CR and NB dyes from
contaminated water.

Keywords: ML; MP; industrial effluents; adsorption

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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