Coagulation with polymers for nanofiltration pre-treatment of highly concentrated dyes

A review

A. Y. Zahrim, C. Tizaoui, Nidal Hilal

    Research output: Contribution to journalReview article

    Abstract

    Water scarcity and strict legislation make water reuse in dye related industries like textile and leather become more important. Among the different types of dyes, soluble dyes are the most problematic. Nanofiltration was vital for the treatment of dye wastewater but the major limitation is fouling. Coagulation/flocculation can be effective to enhance nanofiltration performance towards water reuse and minimisation of fouling. The selection of the coagulant type (metal or polymer) and dosages are very critical in this technique. Factors that improved the coagulation were studied in detail and suitable metal coagulants were presented. Cationic, anionic and natural polymers as flocculant aids were also reported for successfully enhancing dye removal. Adding a suitable type of metal coagulant-polymer at an optimum dosage and mixing conditions increases the dye removal at a wider range of operating pH and reduces the production of sludge. In-depth studies on the effect of metal coagulant-polymer on membrane fouling are still lacking and visualisation techniques might be helpful in this regard.

    Original languageEnglish (US)
    Pages (from-to)1-16
    Number of pages16
    JournalDesalination
    Volume266
    Issue number1-3
    DOIs
    StatePublished - Jan 31 2011

    Fingerprint

    Nanofiltration
    Coagulation
    coagulation
    Coagulants
    dye
    Polymers
    Coloring Agents
    Dyes
    polymer
    Metals
    fouling
    metal
    Fouling
    Water
    Natural polymers
    Membrane fouling
    Leather
    Flocculation
    flocculation
    visualization

    Keywords

    • Coagulation
    • Dye
    • Nanofiltration
    • Polymers

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)
    • Water Science and Technology
    • Mechanical Engineering

    Cite this

    Coagulation with polymers for nanofiltration pre-treatment of highly concentrated dyes : A review. / Zahrim, A. Y.; Tizaoui, C.; Hilal, Nidal.

    In: Desalination, Vol. 266, No. 1-3, 31.01.2011, p. 1-16.

    Research output: Contribution to journalReview article

    Zahrim, A. Y. ; Tizaoui, C. ; Hilal, Nidal. / Coagulation with polymers for nanofiltration pre-treatment of highly concentrated dyes : A review. In: Desalination. 2011 ; Vol. 266, No. 1-3. pp. 1-16.
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