Overlooked effects of chlorides and bicarbonates on the intensity of peroxydisulfate activation in Fe(II)/citric acid-S2O82- process

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43930193" target="_blank" >RIV/60461373:22310/24:43930193 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22320/24:43930193

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352186424001639" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352186424001639</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.eti.2024.103687" target="_blank" >10.1016/j.eti.2024.103687</a>

Result language

angličtina

Original language name

Overlooked effects of chlorides and bicarbonates on the intensity of peroxydisulfate activation in Fe(II)/citric acid-S2O82- process

Original language description

The influence of chlorides (Cl - ) and bicarbonates (HCO 3 - ) on the Fe(II)/citric acid peroxydisulfate based (Fe(II)/CA-S 2 O 8 2- ) process has been commonly attributed to the formation of secondary reactive species, such as Cl center dot and CO 3 center dot , and their different reactivity with the target pollutant compared to primary reactive species (e.g., SO 4 center dot- ). However, this conclusion has been entirely based only on analyzing target pollutants removal without the context of S 2 O 8 2- consumption and dissolved Fe concentration throughout the process. To address this knowledge gap, we conducted a series of batch experiments to investigate the influence of Cl - (2 mmol center dot L -1 ) and HCO 3 - (1 mmol center dot L -1 ) on the intensity of S 2 O 8 2- activation within the Fe(II)/CA-S 2 O 8 2- process with tetrachloroethene (PCE) as the target pollutant. Throughout the experiments, PCE removal efficiency, S 2 O 8 2- consumption, pH, redox potential, and dissolved Fe were analyzed. Equilibrium hydrochemical modelling (Visual MINTEQ 4) and high-resolution transmission electron microscopy (TEM) were employed to analyze and interpret the data obtained. We found that both Cl - and HCO 3 - significantly affected the intensity of S 2 O 8 2- activation. While Cl - influenced the steady-state dissolved Fe(II) concentration, HCO 3 - primarily increased solution pH, which led to the formation of CA-stabilized ferrihydrite nanoparticles. This resulted in the inaccessibility of dissolved Fe(III) to the Fe(III)/Fe(II) regeneration cycle, consequently suppressing S 2 O 8 2- activation intensity and PCE removal. Overall, the findings in this study have deepened the fundamental knowledge of how Cl - and HCO 3 - influence the Fe(II)/CA-S 2 O 8 2- process, which may help improve the design and operation of S 2 O 8 2- -based advanced oxidation processes using the Fe(II)/ CA activation method.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/GA23-05901S" target="_blank" >GA23-05901S: Degradation of benzophenone-type UV filters in aqueous solutions using peroxydisulfate</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

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

Name of the periodical

Environmental Technology &amp; Innovation

ISSN

2352-1864

e-ISSN

2352-1864

Volume of the periodical

35

Issue of the periodical within the volume

Neuvedeno

Country of publishing house

ZA - SOUTH AFRICA

Number of pages

13

Pages from-to

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UT code for WoS article

001244643100001

EID of the result in the Scopus database

2-s2.0-85193749741