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The impact of pre-oxidation with potassium permanganate on cyanobacterial organic matter removal by coagulation

SYSNO ASEP	0471168
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	The impact of pre-oxidation with potassium permanganate on cyanobacterial organic matter removal by coagulation
Author(s)	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)
Source Title	Water Research. - : Elsevier - ISSN 0043-1354 Roč. 114, May (2017), s. 42-49
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	GB - United Kingdom
Keywords	algal organic matter ; coagulation ; Microcystis aeruginosa ; peptides/proteins ; permanganate pre-oxidation ; water treatment
Subject RIV	DJ - Water Pollution ; Quality
OECD category	Environmental sciences (social aspects to be 5.7)
Institutional support	UH-J - RVO:67985874
UT WOS	000397695800005
EID SCOPUS	85013202262
DOI	10.1016/j.watres.2017.02.029
Annotation	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.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2018

Number of the records: 1