The resilience of constructed wetlands treating greywater: the effect of operating conditions and seasonal temperature decline

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12110%2F24%3A43908621" target="_blank" >RIV/60076658:12110/24:43908621 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41320/24:100370 RIV/60460709:41330/24:100370

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2024/ew/d4ew00637b" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2024/ew/d4ew00637b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d4ew00637b" target="_blank" >10.1039/d4ew00637b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The resilience of constructed wetlands treating greywater: the effect of operating conditions and seasonal temperature decline

Popis výsledku v původním jazyce

The use of constructed wetlands to remove pollutants from greywater is a viable solution, but seasonal variability of microbial activity and persistence of some of the organic compounds may impact their treatment efficiency. These shortcomings could be overcome using reactive media like manganese oxides (MnOx) that, as strong oxidants, extend the set of abiotic reactions. The reactivity of MnOx can be altered by the presence of dissolved oxygen, presence of vegetation and ammonium, among many other factors. In this study, constructed wetlands filled with commercial filtering material consisting of MnOx (specifically pyrolusite) or sand were used to treat greywater in an outdoor batch experiment exposed to natural seasonality. The effect of five variables (controlled ones: the presence of MnOx, plants, ammonium, the use of aeration, and uncontrolled: ambient temperature) on the removal of organic pollutants was evaluated. The four selected organic pollutants were: 5-methylbenzotriazole (5MBTR), metoprolol (MTP), bisphenol S (BPS), and diclofenac (DCF). The removal efficiency of DCF in the presence of MnOx was higher than 99% and unaffected by the temperature. The removal was confirmed to be associated with abiotic oxidation of DCF by MnOx. In contrast, sand-filled treatments outcompeted MnOx in removing 5MBTR, MTP, and BPS. The lower removal of 5MBTR, BPS, and MTP in the treatments with MnOx was probably due to organic carbon deficiency. This hypothesis was partially verified by the enantioselective analysis of MTP and the identification of its transformation product (MTP acid, MTPA) in both sand and MnOx treatments, indicating similar biotic removal mechanisms despite contrasting removal efficiencies (by 46-78%). The removal of the studied compounds by biodegradation correlated strongly with the determined electrophilicity index (EI), and the reactivity with MnOx with ionization potential (IP). The unaerated treatments with sand and plants were found the most effective and provided the greatest treatment resilience. In these treatments, the highest removals of the organic pollutants were 65%, 78%, 95% and 80% for 5MBTR, BPS, MTP and DCF, respectively. Implications: unaerated biofilters with sand and plants offer the highest performance and resilience.

Název v anglickém jazyce

The resilience of constructed wetlands treating greywater: the effect of operating conditions and seasonal temperature decline

Popis výsledku anglicky

The use of constructed wetlands to remove pollutants from greywater is a viable solution, but seasonal variability of microbial activity and persistence of some of the organic compounds may impact their treatment efficiency. These shortcomings could be overcome using reactive media like manganese oxides (MnOx) that, as strong oxidants, extend the set of abiotic reactions. The reactivity of MnOx can be altered by the presence of dissolved oxygen, presence of vegetation and ammonium, among many other factors. In this study, constructed wetlands filled with commercial filtering material consisting of MnOx (specifically pyrolusite) or sand were used to treat greywater in an outdoor batch experiment exposed to natural seasonality. The effect of five variables (controlled ones: the presence of MnOx, plants, ammonium, the use of aeration, and uncontrolled: ambient temperature) on the removal of organic pollutants was evaluated. The four selected organic pollutants were: 5-methylbenzotriazole (5MBTR), metoprolol (MTP), bisphenol S (BPS), and diclofenac (DCF). The removal efficiency of DCF in the presence of MnOx was higher than 99% and unaffected by the temperature. The removal was confirmed to be associated with abiotic oxidation of DCF by MnOx. In contrast, sand-filled treatments outcompeted MnOx in removing 5MBTR, MTP, and BPS. The lower removal of 5MBTR, BPS, and MTP in the treatments with MnOx was probably due to organic carbon deficiency. This hypothesis was partially verified by the enantioselective analysis of MTP and the identification of its transformation product (MTP acid, MTPA) in both sand and MnOx treatments, indicating similar biotic removal mechanisms despite contrasting removal efficiencies (by 46-78%). The removal of the studied compounds by biodegradation correlated strongly with the determined electrophilicity index (EI), and the reactivity with MnOx with ionization potential (IP). The unaerated treatments with sand and plants were found the most effective and provided the greatest treatment resilience. In these treatments, the highest removals of the organic pollutants were 65%, 78%, 95% and 80% for 5MBTR, BPS, MTP and DCF, respectively. Implications: unaerated biofilters with sand and plants offer the highest performance and resilience.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20802 - Bioremediation, diagnostic biotechnologies (DNA chips and biosensing devices) in environmental management

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ENVIRONMENTAL SCIENCE-WATER RESEARCH &amp; TECHNOLOGY

ISSN

2053-1400

e-ISSN

2053-1419

Svazek periodika

10

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

3206-3216

Kód UT WoS článku

001329954000001

EID výsledku v databázi Scopus

2-s2.0-85206679517