Number of the records: 1
On the importance of pH value in coagulation
- 1.
SYSNO ASEP 0502798 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the importance of pH value in coagulation Author(s) Načeradská, Jana (UH-J) SAI, ORCID, RID
Pivokonská, Lenka (UH-J) SAI, ORCID, RID
Pivokonský, Martin (UH-J) SAI, ORCID, RIDSource Title Journal of Water Supply Research and Technology. AQUA. - : IWA Publishing - ISSN 0003-7214
Roč. 68, č. 3 (2019), s. 222-230Number of pages 9 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords coagulant dosage ; coagulation ; jar test ; pH optimization Subject RIV DJ - Water Pollution ; Quality OECD category Environmental sciences (social aspects to be 5.7) R&D Projects GA18-14445S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UH-J - RVO:67985874 UT WOS 000469120000006 EID SCOPUS 85066048832 DOI 10.2166/aqua.2019.155 Annotation Many studies have overlooked the role of pH in optimizing coagulation. Herein, the authors emphasize the importance of pH value in coagulation during the production of drinking water. We investigate the influence of pH value on the surface charges and forms of coagulants and impurities intended for removal. A methodology is suggested for optimizing key parameters for efficient coagulation – coagulant dosage and pH value. The study points out that various optimal pH ranges are required for coagulation of specific impurities and their mixtures. For natural organic matter of both humic and algogenic origin, acidic pH values are favourable for their removal through charge neutralization mechanism. Algal cells are effectively coagulated at slightly acidic to neutral pH values due to interactions with coagulant hydroxide precipitates. Inorganic particles are eliminated preferably at around neutral pH values. When mixtures of impurities are coagulated, mutual interaction between the impurities may impact dose of coagulant and also optimal pH ranges. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2020 Electronic address https://iwaponline.com/aqua/article-abstract/68/3/222/66759/On-the-importance-of-pH-value-in-coagulation?redirectedFrom=fulltext
Number of the records: 1