The impact of interactions between algal organic matter and humic substances on coagulation

Pivokonský, Martin; Načeradská, Jana; Brabenec, Tomàš; Novotná, Kateřina; Barešová, Magdalena; Janda, V.

doi:10.1016/j.watres.2015.07.047

Cited by 107 publications

(39 citation statements)

References 33 publications

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“…These peptides/proteins were found to have MW 10,8.4,7.7,6.5, 2.8 and 1 kDa. Interestingly, these peptides/proteins were shown by affinity chromatography to form soluble complexes with iron, which is consistent with findings of other studies (Pivokonsky et al 2009a(Pivokonsky et al , 2015Ma et al 2012), in which high-MW COM compounds were removed with higher efficiency than low-MW compounds. In addition, only negligible amounts of peptides/proteins were removed during coagulation at pH 8.…”

Section: Coagulation Of Kaolinite Together With Com Peptides and Protsupporting

confidence: 91%

“…The COM peptides/proteins produced by M. aeruginosa can enhance coagulation of humic substances if the process is operated within a certain pH range. The positive effect occurs due to electrostatic, hydrophobic and dipole-dipole interactions between proteins and HS (Pivokonsky et al 2015). Some studies have also revealed the effect of AOM components on coagulation of quartz (Bernhardt et al 1985) or kaolin particles (Takaara et al 2007(Takaara et al , 2010.…”

Section: Introductionmentioning

confidence: 99%

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Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

Novotná

Barešová

Čermáková

et al. 2016

European Journal of Environmental Sciences

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Coagulation of peptides and proteins produced by the cyanobacterium Microcystis aeruginosa and their influence on the coagulation of hydrophobic kaolinite particles were investigated. For this purpose, the dose of ferric sulphate used as the coagulant was optimized and jar tests with kaolinite, peptides/proteins and both kaolinite and peptides/proteins were carried out under different pH conditions. At pH 4-5.5, the peptides/proteins were efficiently coagulated and peptides/proteins were also found to contribute to the coagulation of kaolinite particles at this pH. Charge neutralization and adsorption were found to be the dominant coagulation mechanisms. The coagulation efficiency and the character of the prevailing coagulation mechanism were strongly dependent on the charge characteristics of the peptides/proteins, kaolinite and hydrolysis products of iron, thus on the pH value. At a pH of about 6, the coagulation process deteriorated due to the formation of soluble Fe-peptide/protein complexes.

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Section: Coagulation Of Kaolinite Together With Com Peptides and Protsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

Novotná

Barešová

Čermáková

et al. 2016

European Journal of Environmental Sciences

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“…At higher pH values, the peptides/proteins attached to kaolin surface bear more negatively charged -COO -groups, which results in charge stabilization of kaolin particles by peptides/proteins. Similar results were obtained by Pivokonsky et al (2015) who ascertained that COM proteins of cyanobacterium M. aeruginosa coagulate humic substances in the absence of additional coagulant at low pH values (pH <4), where the negative charge of organic molecules was suppressed. A DOC reduction of 55%, 63% and 69% was achieved for initial COM protein/humic substance concentrations of 3/5, 5/5 and 8/5 mg L -1 , respectively.…”

Section: Aom As a Coagulantsupporting

confidence: 84%

“…mechanisms of proteins and humic substances interactions and the charge neutralisation of proteins/humic substance mixture was detected as the main coagulation mechanism by Al hydroxopolymers (Pivokonsky et al 2015).…”

Section: Accepted Manuscriptmentioning

confidence: 97%

“…Moreover, Pivokonsky et al (2015) showed that the molecular interactions between COM proteins and humic substances substantially impacted the coagulation process, as these interactions lead to a noticeable decrease in coagulant dose and increase in coagulation effectiveness when compared with coagulation of humic substances alone. The optimum pH for coagulation of a mixture of COM proteins and humic substances by alum did not differ from the optimum pH for single humic substances coagulation and ranged between pH 5.5-6.2.…”

Section: Impact Of Aom On Coagulation Of Other Substancesmentioning

confidence: 99%

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The impact of algogenic organic matter on water treatment plant operation and water quality: A review

Pivokonský

Načeradská

Kopecká

et al. 2015

Critical Reviews in Environmental Science and Technology

151

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The proliferation of algal and cyanobacteria blooms globally has led to renewed interest in understanding the impact of cell populations on water treatment plant (WTP) performance and resultant water quality, particularly the role of algogenic organic matter (AOM). This review discusses current knowledge on the composition of AOM, how it interferes with water treatment † Address correspondence to Rita K Henderson, ACCEPTED MANUSCRIPT process technologies applied for the treatment of algal blooms and how it affects water quality. Specifically, it was shown that AOM can lead to increased coagulant demand, increased propensity of membrane fouling and contribute to disinfection by-products. Identified knowledge gaps included a need for further research on the impact of cellular organic matter after an algal bloom collapses and the impact of interactions between AOM and natural organic matter.

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Is Electrocoagulation a Promising Technology for Algal Organic Matter Removal? Current Knowledge and Open Questions

et al. 2023

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Electrocoagulation (EC) is a practical alternative to chemical coagulation for the treatment of drinking water that contains various pollutants, including humic substances. Nevertheless, the performance of EC for removal of algal organic matter (AOM) is still largely unexplored. In this review, the properties of AOM, the principles of chemical coagulation and EC, and the current state of knowledge on the coagulation of AOM have been outlined. The limited available literature on the EC of AOM is critically reviewed and let conclude that this is a promising technology for AOM removal. However, the studies on EC are inconsistent in their approaches, and they lack thorough optimization of operating conditions (resultant pH, coagulant dosing) and reports of residual metal concentrations. Some of the identified needs for future research include the complete optimization of EC for AOM removal, its direct comparison with chemical coagulation, and EC testing for the elimination of mixtures of AOM, humic substances, and inorganic particles.

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The impact of interactions between algal organic matter and humic substances on coagulation

Cited by 107 publications

References 33 publications

Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

The impact of algogenic organic matter on water treatment plant operation and water quality: A review

Is Electrocoagulation a Promising Technology for Algal Organic Matter Removal? Current Knowledge and Open Questions

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