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Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System

Author

Listed:
  • Laura Žorža

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia)

  • Kristīne Ceļmalniece

    (Institute of Food Safety, Animal Health and Environment, BIOR, 3 Lejupes Str., LV-1076 Riga, Latvia)

  • Alise Sieriņa

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia
    Lafivents Ltd., 1B K.Ulmana Ave., LV-1004 Riga, Latvia)

  • Una Andersone-Ozola

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia)

  • Tūrs Selga

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia)

  • Gederts Ievinsh

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia)

  • Buka Bērziņa

    (Lafivents Ltd., 1B K.Ulmana Ave., LV-1004 Riga, Latvia)

  • Vadims Bartkevičs

    (Institute of Food Safety, Animal Health and Environment, BIOR, 3 Lejupes Str., LV-1076 Riga, Latvia)

  • Olga Muter

    (Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Riga, Latvia)

Abstract

Air pollution with formaldehyde (FA) has been an emerging concern over recent years. This study was aimed at evaluating the contribution of green wall system-derived expanded clay pellets (ECP) and biofilms to FA removal in liquid phase. The effects of four plant species on this process were compared. An inhibition of the fluorescein diacetate hydrolysis activity of biofilm-derived microorganisms was detected during the exposure to FA in both air and liquid phases, and this effect was plant-species-specific. Liquid chromatography with a UV detector was applied for the quantification of FA. The FA removal activity of ECP in the liquid phase was 76.5 mg ECP −1 after a 24 h incubation in the presence of 100 mg/L FA, while the removal activity of the biofilm differed depending on the plant species used, with the highest values detected in the set with Mentha aquatica , i.e., 59.2 mg ECP −1 . The overall FA removal from the liquid phase during 24 h varied in the range from 63% to 82% with the initial FA concentration of 100 mg/L. Differences in biofilm formation upon ECP enrichment were detected by using confocal laser scanning microscopy. These results contribute to the understanding of air biofiltration mechanisms in hydroponic systems.

Suggested Citation

  • Laura Žorža & Kristīne Ceļmalniece & Alise Sieriņa & Una Andersone-Ozola & Tūrs Selga & Gederts Ievinsh & Buka Bērziņa & Vadims Bartkevičs & Olga Muter, 2023. "Formaldehyde Removal by Expanded Clay Pellets and Biofilm in Hydroponics of a Green Wall System," Sustainability, MDPI, vol. 15(18), pages 1-15, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:18:p:13303-:d:1233268
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    References listed on IDEAS

    as
    1. Natalia Shushunova & Elena Korol & Elisaveta Luzay & Diana Shafieva, 2023. "Impact of the Innovative Green Wall Modular Systems on the Urban Air," Sustainability, MDPI, vol. 15(12), pages 1-20, June.
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