Aktivace perkarbonátu sodného hydrodynamickou kavitací pro odstranění estrogenů

Hydrodynamic cavitation-enhanced activation of sodium percarbonate for estrogen removal

journal article in Web of Science

en

The present paper investigated the potential of hydrodynamic cavitation (HC) as an effective tool for activating sodium percarbonate (SPC). The method's efficiency was demonstrated by effectively removing estrogens, which are pollutants that have adverse impacts on aquatic ecosystems. The effects of the SPC concentration, temperature of solution, and cavitation time were evaluated. After SPC/HC treatment, the removal of estrogens was monitored by LC-MS/MS. Already after 4 s of treatment and 24 h of reaction time, more than 97% of estrogens (initial concentration of 300 ng/L) were removed. The effect of post-treatment time is not considered in several papers, even though it seems to be crucial and is discussed here. The results were supported by the values of degradation rate constants, which fit the pseudo-first-order kinetic model. We also verified that HC alone was not effective for estrogen removal under the selected conditions. The sustainability of the SPC/HC system was evaluated based on electric energy per order calculation. The combination of SPC and HC is a promising approach for rapidly degrading micropollutants such as estrogenic compounds without the need for additional technological steps, such as pH or temperature adjustment.

Tento článek zkoumal potenciál hydrodynamické kavitace (HC) jako účinného nástroje pro aktivaci perkarbonátu sodného (SPC). Účinnost metody byla prokázána účinným odstraňováním estrogenů, což jsou znečišťující látky, které mají nepříznivý vliv na vodní ekosystémy. Byly hodnoceny účinky koncentrace SPC, teploty roztoku a doby kavitace. Po úpravě SPC/HC bylo odstranění estrogenů sledováno pomocí LC-MS/MS. Již po 4 s ošetření a 24 h reakční doby bylo odstraněno více než 97 % estrogenů (počáteční koncentrace 300 ng/l). Vliv doby po úpravě není v několika pracích zohledněn, přestože se zdá být klíčový a je zde diskutován. Výsledky byly podpořeny hodnotami rychlostních konstant degradace, které odpovídají kinetickému modelu pseudoprvního řádu. Ověřili jsme také, že samotná HC nebyla za zvolených podmínek účinná při odstraňování estrogenů. Udržitelnost systému SPC/HC byla vyhodnocena na základě výpočtu elektrické energie na řád. Kombinace SPC a HC je slibným přístupem k rychlému rozkladu mikropolutantů, jako jsou estrogenní sloučeniny, bez nutnosti dalších technologických kroků, jako je úprava pH nebo teploty.

The present paper investigated the potential of hydrodynamic cavitation (HC) as an effective tool for activating sodium percarbonate (SPC). The method's efficiency was demonstrated by effectively removing estrogens, which are pollutants that have adverse impacts on aquatic ecosystems. The effects of the SPC concentration, temperature of solution, and cavitation time were evaluated. After SPC/HC treatment, the removal of estrogens was monitored by LC-MS/MS. Already after 4 s of treatment and 24 h of reaction time, more than 97% of estrogens (initial concentration of 300 ng/L) were removed. The effect of post-treatment time is not considered in several papers, even though it seems to be crucial and is discussed here. The results were supported by the values of degradation rate constants, which fit the pseudo-first-order kinetic model. We also verified that HC alone was not effective for estrogen removal under the selected conditions. The sustainability of the SPC/HC system was evaluated based on electric energy per order calculation. The combination of SPC and HC is a promising approach for rapidly degrading micropollutants such as estrogenic compounds without the need for additional technological steps, such as pH or temperature adjustment.

aktivace;estrogen;hydrodynamická kavitace;organické znečišťující látky;sodík

activation;estrogen;hydrodynamic cavitation;organic pollutants;sodium

01.12.2023

IWA Publishing

1996-9732

88

11

2905–2916

12