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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/ETERM/36
Use of quinoa biochar and its nanocomposites with ZnO for sequestration of brilliant
green dye from wastewater

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1
2
Hira Kanwal , Saima Muzammil , Muhammad Imran , Muhammad Hussnain Siddique 1*
1 Department of Bioinformatics and Biotechnology, Government College University,
Faisalabad, Pakistan
2 Department of Microbiology, Government College University, Faisalabad, Pakistan
3 Department of Environmental Sciences, COMSATS Institute of Information Technology,
Vehari Campus, Pakistan

Correspondence: mhs1049@gmail.com
Abstract

Water contamination is a result of rapid industrialization, unplanned urbanization, and
population growth. During the processing of various products, several industries need a
significant volume of water. Textile companies manufacture 200000 tons of dyes each year,
which are released into sewage, generating high levels of water pollution, causing dangerous
diseases in humans, and affecting aquatic bodies. Biochar is a good substitute for use as an
adsorbent for pollutants. Nanoparticles have been raising more attention in wastewater
treatment process because of small structure and high surface area, excellent magnetic
properties as well as considerable pollutant removal even at very low dosage. Therefore, in this
study we synthesized zinc oxide (ZnO) doped Chenopodium quinoa biochar as adsorbent and
assessed its adsorption capacity for the brilliant green dye. For this purpose, the effect of
wavelength, temperature, contact time, pH, adsorbent dosage and dye concentration on the
adsorption was investigated systematically. The absorbance study was investigated by using a
UV-Vis spectrophotometer. It was seen that under the optimized conditions of pH 10, dye
o
concentration (20mg/L), contact time (30 minutes), temperature (45 C), adsorbent dosage

(0.5g/L for BG) at 120 rpm speed, the maximum adsorption percentage of 87.8% for BG was
observed from the solution onto the ZnO doped quinoa biochar surfaces.
Keywords: Brilliant green; Biochar; ZnO; Adsorption; Quinoa; Wastewater

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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