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The impact of pre-oxidation with potassium permanganate on cyanobacterial organic matter removal by coagulation
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SYSNO ASEP 0471168 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The impact of pre-oxidation with potassium permanganate on cyanobacterial organic matter removal by coagulation Tvůrce(i) Načeradská, Jana (UH-J) SAI, ORCID, RID
Pivokonský, Martin (UH-J) SAI, ORCID, RID
Pivokonská, Lenka (UH-J) SAI, ORCID, RID
Barešová, Magdalena (UH-J) RID, ORCID, SAI
Henderson, R.K. (AU)
Zamyadi, A. (AU)
Janda, V. (CZ)Zdroj.dok. Water Research. - : Elsevier - ISSN 0043-1354
Roč. 114, May (2017), s. 42-49Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova algal organic matter ; coagulation ; Microcystis aeruginosa ; peptides/proteins ; permanganate pre-oxidation ; water treatment Vědní obor RIV DJ - Znečištění a kontrola vody Obor OECD Environmental sciences (social aspects to be 5.7) Institucionální podpora UH-J - RVO:67985874 UT WOS 000397695800005 EID SCOPUS 85013202262 DOI 10.1016/j.watres.2017.02.029 Anotace The study investigates the effect of permanganate pre-oxidation on the coagulation of peptides/proteins of Microcystis aeruginosa which comprise a major proportion of the organic matter during cyanobacterial bloom decay. Four different permanganate dosages (0.1, 0.2, 0.4 and 0.6 mg KMnO4 mg(-1) DOC) were applied prior to coagulation by ferric sulphate. Moreover, changes in sample characteristics, such as UV254, DOC content and molecular weight distribution, after pre-oxidation were monitored. The results showed that permanganate pre-oxidation led to a reduction in coagulant dose, increased organic matter removals by coagulation (by 5-12% depending on permanganate dose), microcystin removal (with reductions of 91-96%) and a shift of the optimum pH range from 4.3 to 6 without to 5.5-73 with pre-oxidation. Degradation of organic matter into inorganic carbon and adsorption of organic matter onto hydrous MnO2 are suggested as the main processes responsible for coagulation improvement. Moreover, permanganate prevented the formation of Fe-peptide/protein complexes that inhibit coagulation at pH about 6.2 without pre-oxidation. The study showed that carefully optimized dosing of permanganate improves cyanobacterial peptide/protein removal, with the benefit of microcystin elimination. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2018
Počet záznamů: 1