Effect of pre-chlorination on Microcystis aeruginosa cell integrity and microcystins removal.

Autor:	Ossanes de Souza, Alexander, Kinoshita Teramoto, Kazumi, Nunes de Freitas, Paloma Nathane, Costa de Almeida, Éryka, Seckler Ferreira Filho, Sidney, Pinto, Ernani
Předmět:	MICROCYSTIS aeruginosa MICROCYSTINS CYANOBACTERIAL blooms CELL permeability WATER supply CYANOBACTERIAL toxins
Zdroj:	Urban Water Journal; 2023, Vol. 20 Issue 8, p968-978, 11p
Abstrakt:	High nutrient input into waterbodies increases potentially toxic cyanobacteria blooms. Pre-chlorination treatment is excellent for cyanobacterial cell inactivation and dissolved cyanotoxins removal in water supply sources. This study aims to evaluate the pre-chlorination effect treatment on Microcystis aeruginosa cell integrity and its hepatotoxins (microcystins, MC) release and degradation on a laboratory scale. Loss of cell integrity is observed with increasing chlorine concentration. The maximum cell permeability without cell disintegration occurs at 2.5 mg Cl2 L−1. Degradations up to 70% and chlorophyll-a reductions over 70% are observed after 60 min exposure, with complete degradation at 2.5 and 3 mg Cl2 L−1. However, chlorine (Cl2) exposure over 40.66 mg min L−1 is required for microcystins MC-LR (i.e. radicals: leucine (L) and arginine (R)) and MC-RR (i.e. radicals: arginine and arginine) oxidation oxidation to concentrations below the legislation value for water potability. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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