Comparative performance of Scirpus grossus for phytotreating mixed dye wastewater in batch and continuous pilot subsurface constructed wetland systems

Enas Abdulqader Saeed Almaamary, Siti Rozaimah Sheikh Abdullah, Nur ‘Izzati Ismail, Mushrifah Idris, Setyo Budi Kurniawan, Muhammad Fauzul Imron

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Dye is one of the pollutants found in water bodies because of the increased growth of the textile industry. In this study, Scirpus grossus was planted inside a constructed wetland to treat mixed dye (methylene blue and methyl orange)-containing wastewater under batch and continuous modes. The plants were exposed to various concentrations (0, 50, 75, and 100 mg/L) of mixed dye for 72 days (with hydraulic retention time of 7 days for the continuous system). Biological oxygen demand, chemical oxygen demand, total organic carbon, pH, temperature, ionic content, and plant growth parameters were measured. Results showed that S. grossus can withstand all the tested dye concentrations until the end of the treatment period. Color removal efficiencies of 86, 84, and 75% were obtained in batch mode, whereas 90%, 85%, and 79% were obtained in continuous mode for 50, 75, and 100 mg/L dye concentrations, respectively. Fourier-transform infrared analysis confirmed the transformation of dye compounds after treatment and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis showed that most of the intermediate compounds were not absorbed into plants but adsorbed onto the surface of the root structure.

Original languageEnglish
Article number114534
JournalJournal of Environmental Management
Volume307
DOIs
Publication statusPublished - 1 Apr 2022

Keywords

  • Methyl orange
  • Methylene blue
  • Phytotechnology
  • Sustainability
  • Wastewater treatment

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