RT journal article
T1 On the Efficacy of H2O2 or S2O82- at Promoting the Inactivation of a Consortium of Cyanobacteria and Bacteria in Algae-Laden Water
A1 Moreno Andrés, Javier
A1 Rivas Zaballos, Ignacio
A1 Acevedo Merino, Asunción
A1 Nebot Sanz, Enrique
A2 Tecnologías del Medio Ambiente
K1 harmful algal bloom
K1 hydrogen peroxide
K1 persulfate
K1 fenton
K1 cyanobacteria
K1 marine bacteria
AB Harmful algal blooms in coastal areas can significantly impact a water source. Microorganisms such as cyanobacteria and associated pathogenic bacteria may endanger an ecosystem and human health by causing significant eco-hazards. This study assesses the efficacy of two different reagents, H2O2 and S2O82-, as (pre-)treatment options for algae-laden waters. Anabaena sp. and Vibrio alginolyticus have been selected as target microorganisms. With the objective of activating H2O2 or S2O82-, additional experiments have been performed with the presence of small amounts of iron (18 mu mol/L). For the cyanobacterial case, H2O2-based processes demonstrate greater efficiency over that of S2O82-, as Anabaena sp. is particularly affected by H2O2, for which >90% of growth inhibition has been achieved with 0.088 mmol/L of H2O2 (at 72 h of exposure). The response of Anabaena sp. as a co-culture with V alginolyticus implies the use of major H2O2 amounts for its inactivation (0.29 mmol/L of H2O2), while the effects of H2O2/Fe(II) suggests an improvement of similar to 60% compared to single H2O2. These H2O2 doses are not sufficient for preventing the regrowth of V alginolyticus after 24 h. The effects of S2O82- (+ Fe(II)) are moderate, reaching maximum inhibition growth of similar to 50% for Anabaena sp. at seven days of exposure. Nevertheless, doses of 3 mmol/L of S2O82- can prevent the regrowth of V alginolyticus. These findings have implications for the mitigation of HABs but also for the associated bacteria that threaten many coastal ecosystems.
PB MDPI
SN 2076-2607
YR 2022
FD 2022-04
LK http://hdl.handle.net/10498/27342
UL http://hdl.handle.net/10498/27342
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026