Distribution and removal of microplastics in a horizontal sub-surface flow laboratory constructed wetland and their effects on the treatment efficiency

Putar, Ula (avtor), Klun, Barbara (avtor), Kalčíková, Gabriela (avtor)

Constructed wetlands are commonly used to treat domestic wastewater, but the extent to which microplastics are retained in constructed wetlands and the impact this has on their efficiency are not known. In this context, we investigated retention of microplastics (microbeads and fibres) and their effects on the removal of carbonaceous (expressed as chemical oxygen demand (COD), biochemical oxygen demand (BOD$_5$), and dissolved organic carbon (DOC)), nitrogenous (N-NH$_4^+$, N-NO$_3^-$, and N-NO$_2^-$), and phosphorous (P-PO$_4^{3-}$) matters in a horizontal sub-surface flow laboratory constructed wetland (LCW) under continuous flow. The LCW was in operation for 257 days, with the first 78 days without microplastics and microplastics added weekly during the next 179 days. The presence of microplastics had no significant effect on COD, BOD$_5$, DOC, N-NH$_4^+$, and N-NO$_3^-$ removal, while a statistically significant decrease in N-NO$_2^-$ and an increase in P-PO$_4^{3-}$ concentrations in the effluent were observed after the addition of microplastics. Microplastics were efficiently retained in the LCW, and only 0.296% and 0.003% of the total microbeads and fibres, respectively, were detected in the effluent. Thus, it is evident that constructed wetlands are an effective barrier to the release of microplastics into the aquatic environment, but the high retention and thus continuous accumulation of microplastics may alter the nutrient cycling in constructed wetlands.

• Jezik: Angleški jezik
• Ključne besede: microplastics, constructed wetland, wastewaters, bioremediation, lagoons, macrophytes, microbeads, wastewater treatment, fibres
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 9 str.
• Številčenje: Vol. 461, art. 142076
• PID: 20.500.12556/RUL-144853
• UDK: 628.32
• ISSN pri članku: 1385-8947
• DOI: 10.1016/j.cej.2023.142076
• COBISS.SI-ID: 143710979
• Datum objave v RUL: 17.03.2023

Gradivo je del revije

• Naslov: Chemical engineering journal
• Skrajšan naslov: Chem. eng. j.
• Založnik: Elsevier
• ISSN: 1385-8947
• COBISS.SI-ID: 2110998

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: mikroplastika, rastlinska čistilna naprava, odpadne vode, bioremediacija