Journal article
Sorption and Biodegradation of Stormwater Trace Organic Contaminants via Composite Alginate Bead Geomedia with Encapsulated Microorganisms
Environmental science water research & technology, Vol.10(12), pp.3339-3357
10/31/2024
DOI: 10.1039/D4EW00600C
Appears in UI Libraries Support Open Access
Abstract
Urban areas generate high volumes of stormwater runoff that frequently contains complex mixtures of hydrophilic trace organic contaminants (TOrCs) and dissolved nutrients. Green Stormwater Infrastructure is becoming increasingly adopted as a nature-based solution for improving water quality but is typically inefficient for removing dissolved-phase contaminants. We recently developed and characterized novel bio-active composite alginate bead media “BioSorp Beads” containing encapsulated PAC and iron-based water treatment residuals [FeWTR] as sorbents and white-rot-fungi as model biodegrading organisms to effectively capture and biodegrade stormwater-relevant TOrCs. We created multiple abiotic (no fungi) and biotic beads (containing Trametes versicolor or Pleurotus ostreatus fungi) to investigate sorption removal of a suite of representative dissolved-phase stormwater relevant pollutants (a neonicotinoid/metabolite, phosphate, three PFAS, and one tire-wear compound [acetanilide]). We also measured coupled sorption and biodegradation of acetanilide as a proof-of-concept demonstration of encapsulated biodegrading organisms. Alginate encapsulation increased desnitro-imidacloprid sorption onto PAC, likely due to the interactions between compound altered insecticidal functional groups and alginate. Sorption capacity of imidacloprid and desnitro-imidacloprid was up to 29.1 mg/g and 16.8 mg/g, respectively, and impacted by PAC presence and the partial charge distributions of the compounds. The encapsulated FeWTR and Fe3+-alginate beads drove phosphate sorption (42.1 mg phosphate/g beads). Long-chained PFAS removal in the beads (13.1 mg PFOA/g) was greater than short-chained PFAS removal capacity (5.2 mg PFBA/g, 5.1 mg PFBS/g). Encapsulated fungi were not inhibited by exposure to azide that typically kill fungi in in laboratory experiments, indicating the potential for encapsulation to protect organisms from harsh conditions. Furthermore, biodegradation of acetanilide by encapsulated fungi beyond sorption controls demonstrated that coupled sorption and biodegradation with the beads occurred. BioSorp Beads successfully capture and biodegrade representative hydrophilic stormwater TOrCs, and thus hold potential as a green stormwater infrastructure geomedia and bioaugmentation tool.
Details
- Title: Subtitle
- Sorption and Biodegradation of Stormwater Trace Organic Contaminants via Composite Alginate Bead Geomedia with Encapsulated Microorganisms
- Creators
- Debojit S. Tanmoy - University of IowaGregory H LeFevre
- Resource Type
- Journal article
- Publication Details
- Environmental science water research & technology, Vol.10(12), pp.3339-3357
- Publisher
- Royal Society of Chemistry
- DOI
- 10.1039/D4EW00600C
- ISSN
- 2053-1400
- eISSN
- 2053-1419
- Language
- English
- Date published
- 10/31/2024
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984742659802771
Metrics
3 Record Views