Title: Removal of anionic dye Eriochrome Black-T using nanocomposites derived from slag

Authors: J. Baalamurugan; V. Ganesh Kumar; C.G. Anjali Das; B.S. Naveen Prasad; K. Govindaraju

Addresses: Nanoscience & Materials Chemistry Division, Centre for Ocean Research (DST-FIST sponsored centre), Sathyabama Institute of Science and Technology, Chennai 600 119, Tamil Nadu, India; Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai 600 119, Tamil Nadu, India ' Nanoscience & Materials Chemistry Division, Centre for Ocean Research (DST-FIST sponsored centre), Sathyabama Institute of Science and Technology, Chennai 600 119, Tamil Nadu, India ' Centre for Ocean Research (DST-FIST sponsored centre), Sathyabama Institute of Science and Technology, Chennai 600 119, Tamil Nadu, India ' Chemical Section, Salalah College of Technology, 211, Oman ' Centre for Ocean Research (DST-FIST sponsored centre), Sathyabama Institute of Science and Technology, Chennai 600 119, Tamil Nadu, India

Abstract: The present investigation highlights slag based nanocomposites in the removal of the anionic dye Eriochrome Black T (EBT) an anionic dye with azo group (-N=N-) that is used as a dyeing agent in textile industries. Induction Furnace (IF) steel slag is generated from steel manufacturing process and is a mixture of inorganic elements mainly of silicon, iron, aluminium, and calcium. Slag nanocomposites are sintered at 600°C for 4 h. Removal properties of slag nanocomposites on EBT dye is determined using UV-Vis spectroscopy. The pH, concentration of dye, and amount of slag nanocomposite are the parameters that were studied with various contact times. Surface morphology of slag nanocomposite before and after dye removal has been analysed using Scanning Electron Microscope (SEM). FTIR analysis is used to analyse the structural bonding of slag nanocomposites with dye molecules. Formation of core-shell structure in slag nanocomposite with dye molecules is revealed and the removal efficiency of inorganic elements present in slag nanocomposites is explored.

Keywords: steel slag; metal oxides; nanocomposites; thermal treatment; Eriochrome Black-T; ion exchange; core-shell structure; waste water treatment.

DOI: 10.1504/IJNT.2021.116165

International Journal of Nanotechnology, 2021 Vol.18 No.5/6/7/8, pp.449 - 461

Published online: 12 Jul 2021 *

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