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Treatment of textile dye consortium through photo-electro-fenton process using graphite-Ti electrode system and toxicity studies

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(7), pp.2011-2025
  • DOI : 10.1007/s42823-023-00551-x
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : March 24, 2023
  • Accepted : May 26, 2023
  • Published : December 1, 2023

Gomathi E. 1,  Maharaja P. 2,  Rathore Hanumant Singh 3,  Boopathy R. 4,  Panda Rames C. 5,  Senthilvelan T. 6,  Arthanareeswari Maruthapillai 7

1Department of Petrochemical Technology, University College of Engineering—BIT Campus, Anna University, Tiruchirappalli, Tamilnadu, 620024, India
2Environmental Engineering Department, CSIR-Central Leather Research Institute (CLRI), Adyar, Chennai, Tamilnadu, 600020, India
3Department of Biotechnology, School of Engineering & Technology, Nagaland Central University, Dimapur, Nagaland, 797112, India
4Department of Environment and Sustainability (IMMT), CSIR-Institute of Minerals and Materials Technology, Bhubaneshwar, India
5Chemical Engineering Division, CSIR—Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, India
6Department of Molecular Analytics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Tamilnadu, 602105, Chennai, India
7Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Tamilnadu, 603203, Kattankulathur, India

Accredited

ABSTRACT

The dyeing process is a very important unit operation in the leather and textile industries; it produces significant amounts of waste effluent containing dyes and poses a substantial threat to the environment. Therefore, degradation of the industrial dye-waste liquid is necessary before its release into the environment. The current is focusing on the reduction of pollutant loads in industrial wastewater through remediating azo and thiazine dyes (synthetic solutions of textile dye consortium). The current research work is focused on the degradation of dye consortium through photo-electro-Fenton (PEF) processes via using dimensionally stable anode (Ti) and graphite cathode. The ideal conditions, which included a pH of 3, 0.1 (g/L) of textile dye consortium, 0.03 (g/L) of iron, 0.2 (g/L) of H2O2, and a 0.3 mAcm-2 of current density, were achieved to the removal of dye consortium over 40 min. The highest dye removal rate was discovered to be 96%. The transition of azo linkages into N2 or NH3 was confirmed by Fourier transforms infra-red spectroscopic analysis. PEF process reduced the 92% of chemical oxygen demand (COD) of textile dye consortium solution, and it meets the kinetics study of the pseudo-first-order. The degradation of dye through the PEF process was evaluated by using the cyclic voltammetric method. The toxicity tests showed that with the treated dye solution, seedlings grew well.

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