Dissolved and colloidal substances (DCS) and the charge demand of papermaking process waters and suspensions : a review

Martin A. Hubbe, Anna Sundberg, Paulina Mocchiutti, Ni Yonghao, Robert Pelton

    Research output: Contribution to journalReview Article or Literature Reviewpeer-review

    57 Citations (Scopus)


    Dissolved and colloidal substances (DCS) in the process waters of paper machine systems can interfere with the retention of fine particles, retard the drainage of water from the wet web, and generally hurt the intended functions of various polyelectrolytes that are added to the process. This review considers publications that have attempted to characterize the nature and effects of different DCS fractions, in addition to some of the ways that paper technologists have attempted to overcome related problems. The consequences of DCS in a paper machine system can be traced to their ability to form complexes with various polyelectrolytes. Such tendencies can be understood based on a relatively strong complexing ability of multivalent materials, depending on the macromolecular size and charge density. Continuing research is needed to more fully understand the different contributions to cationic demand in various paper machine systems and to find more efficient means of dealing with DCS.
    Original languageUndefined/Unknown
    Pages (from-to)6109–6193
    Number of pages85
    Issue number4
    Publication statusPublished - 2012
    MoE publication typeA2 Review article in a scientific journal


    • Cationic demand
    • Charge demand
    • Dissolved and colloidal substances (DCS)
    • Drainage
    • Fines
    • Interferences to polymeric retention aids
    • Polyelectrolyte complexes
    • Retention

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