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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/NMsB/07
Removal of congo red dye from wastewater using magnetite assisted composites of
cassia fistula leaves and pods biomass

1
1
1
1
Muhammad Imran *, Muhammad Arslan , Muhammad Mohsin Iqbal , Nimra Farooq ,
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2
Mazhar Ali , Muhammad Imtiaz Rashid
1 Department of Environmental Sciences, COMSATS University Islamabad, Vehari- Campus,
61100 Pakistan
2 Centre of Excellence in Environmental Studies, King Abdulaziz University, Kingdom of
Saudi Arabia
Correspondence: imranrb@cuivehari.edu.pk
Abstract

There is growing awareness that drinking water can become contaminated following its
disposal from industrial effluents rich in dyes. Water quality is being degraded because of these
dyes containing effluents which are disposed of without primary treatment in water bodies.
These dyes need to be treated with cost effective and environment friendly adsorbents to meet
water quality requirements. In this research, a novel method using Cassia fistula leaves (CFL),
Cassia fistula pods (CFP) and their nanocomposites with magnetite nanoparticles (CFL/MNPs)
and (CFP/MNPs) were used for batch scale removal of Congo red dye (CR). The effects of
several adsorbent doses (1 – 4 g/L), initial dye concentration (25 - 200 mg/L), pH (2 - 8), and
contact time (15 - 180 min) were evaluated and the adsorption potential of these adsorbents
was compared. The adsorbents were characterized, and experimental data was validated with
kinetic and equilibrium adsorption models. The removal of CR attributed to dosage was highest
at dosage of 2g/L. The maximum removal was 90, 85, 74, and 90 % by using CFL, CFL/MNPs,
CFP, and CFP/MNPs respectively. It was noticed that the removal of CR dye was 94, and 88%
by using CFL, and CFL/MNPs respectively. While the removal of CR with CFP, and
CFP/MNPs was 79, and 94% respectively at concentration 100 mg/L, dose of 2g/L and
equilibrium. This study demonstrates that application of low cost and effective biosorbent
combined with nanoparticles can be very promising for the removal of textile dyes from
contaminated aqueous systems.
Keywords: CR; CFL; wastewater

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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