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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/NMsB/08
Removal of navy-blue dye from wastewater using magnetite and ZnO assisted
composites of cassia fistula leaves and pods biomass

1
1*
1
1
Muhammad Mohsin Iqbal , Dr. Muhammad Imran , Nimra Farooq , Dr. Mazhar Ali ,
2
Muhammad Hussnain Siddique , Saima Muzammil 3
1 Department of Environmental Sciences, COMSATS University Islamabad, Vehari- Campus,
61100 Pakistan
2 Department of Bioinformatics and Biotechnology, Government College University,
Faisalabad, Pakistan
3 Department of Microbiology, Government College University, Faisalabad, Pakistan
Correspondence: imranrb@cuivehari.edu.pk

Abstract
Water quality is being degraded with dyes because of the effluents which are eluted into water
bodies without primary treatment. Water contaminated with Navy Blue (NB) dye causes many
serious health and environmental impacts. These dyes need to be treated with cost effective
and environment friendly adsorbents to meet water quality requirements. In this study, Cassia
fistula leaves (CFL), Cassia fistula pods (CFP) and their nanocomposites with zinc oxide and
magnetite nanoparticles (CFL/ZnO, CFL/MNPs, CFP/ZnO and CFP/MNPs) were used for
batch scale removal of NB. The effects of several adsorbent doses (1 – 4 g/L), initial
concentration (25 - 200 mg/L) of the dye, pH (2 - 8), and contact time (15 - 180 min) were
evaluated and the adsorption potential of these adsorbents was compared. The removal of NB
was 29, 34, and 65% with CFL, CFL/ZnO, and CFL/MNPs respectively, at optimum conditions
(100 mg/L, dose 2g/L and equilibrium. Moreover, the removal was 25, 41 and 56% by using
CFP, CFP/ZnO and CFP/MNPs respectively. The characterization of the material shows that
the composites with nanoparticles were more porous than CFL and CFP. This study
demonstrates that application of low cost and effective biosorbents combined with
nanoparticles can be very promising for the removal of textile dyes from contaminated aqueous
systems.

Keywords: NB; biosorbent; textile dyes

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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