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    Natural organic matter (NOM) and turbidity removal by plant-based coagulants: A review

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    Publication date
    2021
    End of Embargo
    2023-10-16
    Author
    Okoro, B. U.
    Sharifi, S.
    Jesson, M. A.
    Bridgeman, John
    Keyword
    Coagulation-flocculation
    Coagulant
    Drinking water
    Organic matter
    Compounds extraction and purification
    Natural organic matter (NOM)
    Rights
    © 2021 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    yes
    Open Access status
    Green
    
    Metadata
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    Abstract
    NOM deteriorates water quality by forming taste, clarification, colour, and odour problems. It also increases coagulant and chlorine consumption which can initiate disinfection by-products harmful to human health. The coagulation-flocculation (CF) technique is an established method commonly employed to remove NOM in water treatment. Plant-based coagulant products (PCPs) derived from plants like the Moringa oleifera (MO) Strychnos potatorum Linn and Opuntia ficus indica, have been studied and proposed as sustainable alternatives to chemical coagulant, like, aluminium sulphate due to their abundant availability, low cost, low sludge volume and disposal cost, and biodegradability. This review paper provides an overview of the most widely studied plant-based coagulants and discusses their NOM and turbidity removal. It investigates recent analytical tools applied in their characterisation and floc morphological studies. The paper also investigates the effects of operating parameters such as coagulant dose, temperature, and pH, on NOM and turbidity removal. It also reviews up-to-date PCPs biophysical properties and CF mechanism and examines the efficiency of their extraction methods in reducing NOM. Finally, it discusses and suggests ways to overcome commercialisation draw-back caused by nutrient addition.
    URI
    http://hdl.handle.net/10454/18638
    Version
    Accepted manuscript
    Citation
    Okoro BU, Sharifi S, Jesson MA and Bridgeman J (2021) Natural organic matter (NOM) and turbidity removal by plant-based coagulants: A review. Journal of Environmental Chemical Engineering. 9(6): 106588.
    Link to publisher’s version
    https://doi.org/10.1016/j.jece.2021.106588
    Type
    Article
    Notes
    The full text will be available at the end of the publisher's embargo: 16th October 2023
    Collections
    Engineering and Informatics Publications

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