The mechanisms of potassium permanganate on algae removal

Chen, Jen‐Jeng; Yeh, Hsuan‐Hsien

doi:10.1016/j.watres.2005.08.032

Cited by 204 publications

(71 citation statements)

References 19 publications

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“…by Mouchet & Bonné lye 1998); in particular, the addition of oxidants such as chlorine, ozone and potassium permanganate at the head of water treatment plants (WTPs) prior to coagulation has been shown to increase the removal of algae (Montiel & Welté 1988;Plummer & Edzwald 2002;Chen & Yeh 2005. These oxidants alter the surface characteristics and charge of algae thus improving their removal during coagulation and flocculation.…”

Section: Introductionmentioning

confidence: 99%

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Optimising water treatment practices for the removal of Anabaena circinalis and its associated metabolites, geosmin and saxitoxins

Tanis-Plant

Kayal

et al. 2009

Journal of Water and Health

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The cyanobacterium Anabaena circinalis has the ability to co-produce geosmin and saxitoxins, compounds which can compromise the quality of drinking water. This study provides pertinent information in optimising water treatment practices for the removal of geosmin and saxitoxins.In particular, it demonstrates that pre-oxidation using potassium permanganate could be applied at the head of water treatment plants without releasing intracellular geosmin and saxitoxins from A. circinalis. Furthermore, powdered activated carbon (PAC) was shown to be an effective treatment barrier for the removal of extracellular (dissolved) geosmin and saxitoxins, with similar adsorption trends of both compounds. The relative removal of the saxitoxins compared with geosmin was determined to be 0.84^0.27, which implies that saxitoxin removal with PAC can be estimated to be approximately 60 to 100% of the removal of geosmin under equivalent conditions. Chlorine was shown to be effective for the oxidation of the saxitoxins with CT values of approximately 30 mg min l 21 required for greater than 90% destruction of the saxitoxins.

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Section: Introductionmentioning

confidence: 99%

“…However, studies have demonstrated that potassium permanganate can lyse algal cells (Petrusevski et al 1996;Chen & Yeh 2005 with the dose of potassium permanganate resulting in cell damage shown to be species-dependent. Consequently, there exists a dilemma in applying potassium permanganate to achieve conflicting water quality goals.…”

Section: Introductionmentioning

confidence: 99%

Optimising water treatment practices for the removal of Anabaena circinalis and its associated metabolites, geosmin and saxitoxins

Tanis-Plant

Kayal

et al. 2009

Journal of Water and Health

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“…The introduction of chemical oxidants, i.e., KMnO 4 , Cl 2 , and O 3 , prior to coagulation can also improve algae removal, and the inactivation of algae cells plays a determining role (Ma and Liu, 2002;Chen and Yeh, 2005;Chen et al, 2008Chen et al, , 2009Shen et al, 2011;Wang et al, 2013). However, excessive inactivation with over-dosed oxidants results in significant rupture of algae cells and the release of IOM accordingly.…”

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confidence: 99%

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Lan

Miao

et al. 2016

Water Research

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a b s t r a c tKMnO 4 eFe(II) pretreatment was proposed to enhance Microcystis aeruginosa (M. aeruginosa) removal by aluminum (Al) coagulation in drinking water treatment plants (DWTPs) in our previous study. This study aims to optimize this process and evaluate the feasibility of using the process at water sources, which are usually far away from DWTPs. The optimum molar ratio of KMnO 4 to Fe(II) ½R KMnO4:FeðIIÞ is observed to be 1:3 with respect to algae removal and residual manganese (Mn) control. As indicated from flow cytometer analysis, KMnO 4 at <20 mM promisingly maintains cell integrity, with damaged cell ratios of below 10%. KMnO 4 at 30 and 60 mM damages M. aeruginosa cells more significantly and the damaged cell ratios increase to 21% and 34% after 480 min. The intracellular organic matter (IOM) release can be controlled by the subsequent introduction of Fe(II) to quench residual KMnO 4 . KMnO 4 eFe(II) pretreatment at the KMnO 4 dose of 10 mM dramatically enhances the algae removal by over 70% compared to that by Al coagulation, even if KMnO 4 and Fe(II) are introduced 480 min prior to the addition of Al 2 (SO 4 ) 3 . The Al doses can be reduced by more than half to achieve the same algae removal. Furthermore, the deposition of the tiny FeeMn precipitates formed rarely occurs, as indicated by a settleability evaluation prior to Al addition. The KMnO 4 eFe(II) process can be sequentially dosed at intake points in water sources to achieve moderate inactivation of algae cells and to enhance algae removal in DWTPs thereafter.

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“…With increasing the dosage of KMnO4, its pre-oxidation can inactivate algae to easily form flocs to settle, so that the algae can be removed [7]. When the dosage of KMnO4 is 1.2mg/L, the removal rate of chlorohyll(a) is 76.2%.…”

Section: B Kmno4 Pre-oxidation Experimentsmentioning

confidence: 99%

Experimental Study on the Removal of Algae and Odor with the Combined Process of Potassium Permanganate and Powdered Activated Carbon

Hu¹,

Hu²,

Peng³

et al. 2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

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Abstract-The pre-oxidation agent is potassium permanganate (KMnO4) and the adsorbent is powdered activated carbon in this experiment. The raw water is treated by KMnO4 comparing with KMnO4 and powdered activated carbon in order to study the removal of turbidity, algae and odor. When the KMnO4 dosage is 1.2mg/L, the removal rate of turbidity, chlorohyll(a) and odor are 75.3%, 76.2%, 68.2% respectively. When the dosage of KMnO4 and powdered activated carbon are 1.2mg/L and 15mg/L respectively. The removal rate of turbidity, chlorohyll(a), and odor are 90.3%, 92.7%, 91.9% respectively. The experimental results show that the process that KMnO4 combined with powdered activated carbon achieved more effective turbidity removal.

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The mechanisms of potassium permanganate on algae removal

Cited by 204 publications

References 19 publications

Optimising water treatment practices for the removal of Anabaena circinalis and its associated metabolites, geosmin and saxitoxins

Optimising water treatment practices for the removal of Anabaena circinalis and its associated metabolites, geosmin and saxitoxins

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Experimental Study on the Removal of Algae and Odor with the Combined Process of Potassium Permanganate and Powdered Activated Carbon

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