Eco-friendly management of harmful cyanobacterial blooms in eutrophic lakes through vertical flow multi-soil-layering technology.

Autor: Aba RP; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: r.aba.ced@uca.ac.ma., Sbahi S; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco; National Institute of Scientific and Technological Research in Water, City of Innovation Souss Massa, Ibn Zohr University, BP 32/S, Riad Salam, CP 80000 Agadir, Morocco. Electronic address: s.sbahi@uiz.ac.ma., Mugani R; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: r.mugani.ced@uca.ac.ma., Redouane EM; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: elmahdi.redouane@ced.uca.ma., Hejjaj A; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco. Electronic address: a.hejjaj@uca.ac.ma., Azevedo J; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal. Electronic address: joana.azevedo@ciimar.up.pt., Moreira CIT; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal. Electronic address: cmoreira@ciimar.up.pt., Boo SF; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal. Electronic address: sboo@ciimar.up.pt., Alexandrino DADM; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal. Electronic address: dalexandrino@ciimar.up.pt., Campos A; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal. Electronic address: acampos@ciimar.up.pt., Vasconcelos V; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal. Electronic address: vmvascon@fc.up.pt., Oudra B; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: oudra@uca.ac.ma., Ouazzani N; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: ouazzani@uca.ac.ma., Mandi L; National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Av. Abdelkarim El Khattabi, P.O. Box: 511, 40000 Marrakech, Morocco; Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: mandi@uca.ma.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 May 15; Vol. 470, pp. 134281. Date of Electronic Publication: 2024 Apr 16.
DOI: 10.1016/j.jhazmat.2024.134281
Abstrakt: Eutrophication has led to the widespread occurrence of cyanobacterial blooms. Toxic cyanobacterial blooms with high concentrations of microcystins (MCs) have been identified in the Lalla Takerkoust reservoir in Morocco. The objective of this study was to evaluate the efficiency of the Multi-Soil-Layering (MSL) ecotechnology in removing natural cyanobacterial blooms from the lake. Two MSL pilots were used in rectangular glass tanks (60 × 10 × 70 cm). They consisted of permeable layers (PLs) made of pozzolan and a soil mixture layer (SML) containing local soil, ferrous metal, charcoal and sawdust. The main difference between the two systems was the type of local soil used: sandy soil for MSL1 and clayey soil for MSL2. Both MSL pilots effectively reduced cyanobacterial cell concentrations in the treated water to very low levels (0.09 and 0.001 cells/mL). MSL1 showed a gradual improvement in MC removal from 52 % to 99 %, while MSL2 started higher at 90 % but dropped to 54% before reaching 86%. Both MSL systems significantly reduced organic matter levels (97.2 % for MSL1 and 95.8 % for MSL2). Both MSLs were shown to be effective in removing cyanobacteria, MCs, and organic matter with comparable performance.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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