Removal of per- and polyfluoroalkyl substances and organic fluorine from sewage sludge and sea sand by pyrolysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F24%3A00584759" target="_blank" >RIV/61388971:_____/24:00584759 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985858:_____/24:00584759 RIV/61389021:_____/24:00584759 RIV/00216208:11310/24:10481060

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s42773-024-00322-5" target="_blank" >https://link.springer.com/article/10.1007/s42773-024-00322-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42773-024-00322-5" target="_blank" >10.1007/s42773-024-00322-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Removal of per- and polyfluoroalkyl substances and organic fluorine from sewage sludge and sea sand by pyrolysis

Popis výsledku v původním jazyce

Pyrolysis is one method for treating sewage sludge, particularly in remote areas or decentralised systems. The end product of pyrolysis, sludge-char, can serve as a soil improver. However, there is a lack of comprehensive data on the organic pollutants’ behaviour in sludge-char. In our work, we focused on the behaviour of per- and polyfuoroalkyl substances (PFASs). Sludge was pyrolyzed at 200–700 °C to determine the minimum safe temperature for efective PFASs removal. It is important to note that PFASs may not only be mineralized but also cleaved to unanalyzed PFASs and other organofuorinated substances. To address this issue, we incorporated additional measurements of organic fuorine in the experiment using combustion ion chromatography (CIC). Due to the inherent heterogene ity of sludge, containing a variety of pollutants and their precursors, we conducted pyrolysis on artifcially contaminated sand. This allowed us to assess and compare the behaviour of PFASs in a homogeneous matrix. Based on our analyses, we determined that a temperature greater than 400 °C is imperative for efective PFASs and organic fuorine removal. The results were verifed by analyzing samples from a commercial sludge pyrolysis unit at the BohuslaviceTrutnov WWTP, which confrmed our measurements. In light of these results, it becomes evident that sludge pyrolysis below 400 °C is unsuitable for PFAS removal from sewage sludge.

Název v anglickém jazyce

Removal of per- and polyfluoroalkyl substances and organic fluorine from sewage sludge and sea sand by pyrolysis

Popis výsledku anglicky

Pyrolysis is one method for treating sewage sludge, particularly in remote areas or decentralised systems. The end product of pyrolysis, sludge-char, can serve as a soil improver. However, there is a lack of comprehensive data on the organic pollutants’ behaviour in sludge-char. In our work, we focused on the behaviour of per- and polyfuoroalkyl substances (PFASs). Sludge was pyrolyzed at 200–700 °C to determine the minimum safe temperature for efective PFASs removal. It is important to note that PFASs may not only be mineralized but also cleaved to unanalyzed PFASs and other organofuorinated substances. To address this issue, we incorporated additional measurements of organic fuorine in the experiment using combustion ion chromatography (CIC). Due to the inherent heterogene ity of sludge, containing a variety of pollutants and their precursors, we conducted pyrolysis on artifcially contaminated sand. This allowed us to assess and compare the behaviour of PFASs in a homogeneous matrix. Based on our analyses, we determined that a temperature greater than 400 °C is imperative for efective PFASs and organic fuorine removal. The results were verifed by analyzing samples from a commercial sludge pyrolysis unit at the BohuslaviceTrutnov WWTP, which confrmed our measurements. In light of these results, it becomes evident that sludge pyrolysis below 400 °C is unsuitable for PFAS removal from sewage sludge.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Biochar

ISSN

2524-7972

e-ISSN

2524-7867

Svazek periodika

6

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

31

Kód UT WoS článku

001191243400002

EID výsledku v databázi Scopus

2-s2.0-85188671563