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

Roseline Prisca Aba; Sofyan Sbahi; Richard Mugani; El Mahdi Redouane; Abdessamad Hejjaj; Joana Azevedo; Cristiana Ivone Tavares Moreira; Sergio Fernández Boo; Diogo Alves Da Mota Alexandrino; Alexandre Campos; Vitor Vasconcelos; Brahim Oudra; Naaila Ouazzani; Laila Mandi

doi:10.1016/j.jhazmat.2024.134281

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

J Hazard Mater. 2024 May 15:470:134281. doi: 10.1016/j.jhazmat.2024.134281. Epub 2024 Apr 16.

Authors

Affiliations

¹ 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: [email protected].
² 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: [email protected].
³ 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: [email protected].
⁴ Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: [email protected].
⁵ 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: [email protected].
⁶ 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: [email protected].
⁷ 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: [email protected].
⁸ 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: [email protected].
⁹ 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: [email protected].
¹⁰ 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: [email protected].
¹¹ 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: [email protected].
¹² Water, Biodiversity and Climate change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. Box 2390, Marrakech 40000, Morocco. Electronic address: [email protected].
¹³ 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: [email protected].
¹⁴ 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: [email protected].

PMID: 38626680
DOI: 10.1016/j.jhazmat.2024.134281

Abstract

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.

Keywords: Cyanobacterial blooms; Eco-friendly remediation; Eutrophication; Multi-Soil-Layering technology; Water quality.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cyanobacteria* / growth & development
Environmental Restoration and Remediation / methods
Eutrophication*
Lakes* / microbiology
Microcystins* / analysis
Morocco
Soil* / chemistry
Water Purification / methods

Substances

Microcystins
Soil