Page 41 - IPCoSME 2021

1 INTERNATIONAL POSTGRADUATE CONFERENCE ON SCIENCE AND MARINE ENVIRONMENT 2021
st
(IPCoSME 2021)
“Environmental Sustainability Enhancement Through the Collaboration of Sciences”

RD-09

A STUDY ON EFFECT OF SEAWEED BASED GREEN CATALYST ON DYE

CONCENTRATION AND CATALYST DOSE AGAINST AZO DYES

SAYYED JAHEERA ANWAR , HANIS MOHD YUSOFF AND IRSHAD UL HAQ
1
1,2
BHAT 3

1 Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala
Nerus, Terengganu, Malaysia
2 Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine
Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu,
Malaysia
3 Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences,
Friedrich Reinhold Kreutzwaldi 1a, 51014 Tartu, Estonia

*Corresponding author email: hanismy@umt.edu.my & P4092@pps.umt.edu.my

Abstract: Azo dyes are considered as harmful water pollutant due to their carcinogenic nature

which has been a major concern these days. Palladium nanoparticles have been proved to be
one of the best catalysts for the degradation of the azo dyes. Hence, in this study we have
adopted a green approach for the synthesis of Palladium Nanocatalyst (PdNC) using an aqueous
extract of Sargassum species. The obtained PdNC was characterized by using various

instruments like Ultraviolet-visible, Fourier transform infrared spectroscopy spectra X-ray
diffraction, transmission electron microscopy, scanning electron microscopy and thermo
gravimetric analysis. The catalytic activity and reaction kinetics against different azo dyes like
Congo red (CR), Methyl orange (MO) and Methyl red (MR) were carried out in presence of
NaBH4 and followed pseudo first order reaction kinetics. The effect of PdNC activity on dye

concentration and effect of PdNC dose against the different azo-dyes (CR, MO, and MR) was
studied. It was revealed that the effect on different dye concentration has shown the highest
degradation at 0.1 mM, 0.08 mM, 0.1 mM for CR, MO, and MR respectively; while, the effect

of PdNC load has shown the highest degradation at 40, 60 and 80 (1μg/1μL) for CR, MO, and
MR respectively. The overall percent degradation calculated was around 95–99% within 10
min for all the organic azo dyes. The degradation pattern observed for all three dye were found
to be in an order CR > MO > MR after PdNC treatment. In conclusion it can be considered
that the PdNC has exhibited excellent degradation activity against Congo red, Methyl orange

and Methyl.

Keywords: Sargassum, NaBH4, congo red, methyl orange and methyl red

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