Treatment of synthetic textile wastewater containing dye mixtures with microcosms

Dina A. Yaseen, Miklas Scholz

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)

Abstract

The aim was to assess the ability of microcosms (laboratory-scale shallow ponds) as a post polishing stage for the remediation of artificial textile wastewater comprising two commercial dyes (basic red 46 (BR46) and reactive blue 198 (RB198)) as a mixture. The objectives were to evaluate the impact of Lemna minor L. (common duckweed) on the water quality outflows; the elimination of dye mixtures, organic matter, and nutrients; and the impact of synthetic textile wastewater comprising dye mixtures on the L. minor plant growth. Three mixtures were prepared providing a total dye concentration of 10 mg/l. Findings showed that the planted simulated ponds possess a significant (p < 0.05) potential for improving the outflow characteristics and eliminate dyes, ammonium-nitrogen (NH4-N), and nitrate-nitrogen (NO3-N) in all mixtures compared with the corresponding unplanted ponds. The removal of mixed dyes in planted ponds was mainly due to phyto-transformation and adsorption of BR46 with complete aromatic amine mineralisation. For ponds containing 2 mg/l of RB198 and 8 mg/l of BR46, removals were around 53%, which was significantly higher than those for other mixtures: 5 mg/l of RB198 and 5 mg/l of BR46 and 8 mg/l of RB198 and 2 mg/l of BR46 achieved only 41 and 26% removals, respectively. Dye mixtures stopped the growth of L. minor, and the presence of artificial wastewater reduced their development.

Original languageEnglish
Pages (from-to)1980-1997
Number of pages18
JournalEnvironmental Science and Pollution Research
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Aromatic amine
  • Artificial fabric effluent
  • Biological treatment
  • Chemical oxygen demand removal
  • Dyes mixture
  • Lemna minor L
  • Mineralisation
  • Nutrient

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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