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Removal of manganese by adsorption onto newly synthesized TiO2-based adsorbent during drinking water treatment
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SYSNO ASEP 0547350 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Removal of manganese by adsorption onto newly synthesized TiO2-based adsorbent during drinking water treatment Author(s) Fialová, Kateřina (UH-J) ORCID, SAI, RID
Motlochová, Monika (UACH-T) SAI, RID, ORCID
Čermáková, Lenka (UH-J) RID, ORCID, SAI
Novotná, Kateřina (UH-J) SAI, ORCID, RID
Báčová, J. (CZ)
Roušar, T. (CZ)
Šubrt, Jan (UACH-T) SAI, RID
Pivokonský, Martin (UH-J) SAI, ORCID, RIDSource Title Environmental Technology. - : Taylor & Francis - ISSN 0959-3330
Roč. 44, č. 9 (2023), s. 1322-1333Number of pages 12 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords adsorpiton ; ion exchange ; manganese ; titanium dioxine ; drinking water treatment Subject RIV DJ - Water Pollution ; Quality OECD category Environmental sciences (social aspects to be 5.7) Subject RIV - cooperation Institute of Inorganic Chemistry - Inorganic Chemistry R&D Projects LM2015073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure NanoEnviCz II - 90124 - Ústav fyzikální chemie J. Heyrovského AV ČR, v. v. i. Method of publishing Limited access Institutional support UH-J - RVO:67985874 ; UACH-T - RVO:61388980 UT WOS 000723055200001 EID SCOPUS 85119992168 DOI 10.1080/09593330.2021.2000042 Annotation Manganese is naturally present in water, but its increased concentration in potable water is undesirable for multiple reasons. This study investigates an alternative method of demanganization by a newly synthesized TiO2-based adsorbent prepared through the transformation of titanyl sulphate monohydrate to amorphous sodium titanate. Its adsorption capacity for Mn2+ was determined, while a range of influential factors, such as the effect of contact time, adsorbent dosage, pH value, and added ions was evaluated. The adsorbent appeared highly effective for Mn2+ removal owing to its unique characteristics. Besides adsorption via electrostatic interactions, ion-exchange was also involved in the Mn2+ removal. Although the Mn2+ removal occurred within the whole investigated pH range of 4–8, the maximum was achieved at pH 7, with qe = 73.83 mg·g-1. Equilibrium data revealed a good correlation with Langmuir isotherm in the absence of any ions or in the presence of monovalent co-existing ions, while the results in the presence of divalent co-existing ions showed a better fit to Freundlich isotherm. Additionally, the presence of monovalent cations (Na+, K+) only slightly decreased the Mn2+ removal efficiency as compared to divalent cations (Ca2+, Mg2+) that caused a greater decrease. However, the effect of anions (Cl-, SO42-) was insignificant. To provide insight into the adsorbent safety, the toxicity assessment was performed and showed no harmful effect on cell activity. Furthermore, the residual concentration of titanium after adsorption was always below the detection limit. The results imply that the synthesized TiO2-based adsorbent is a safe promising alternative method for demanganization. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2024 Electronic address https://www.tandfonline.com/doi/full/10.1080/09593330.2021.2000042
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