Cellulose Microfibres Obtained from Agro-Industrial Tara Waste for Dye Adsorption in Water

Silvia Ponce, Maria Chavarria, Fiama Norabuena, Dalton Chumpitaz, Abel Gutarra

    Research output: Contribution to journalArticle (Contribution to Journal)peer-review

    Abstract

    Microfibres of cellulose were extracted from tara residues (TR), obtained after the production process, and used to remove dyes in aqueous solution. Caesalpinia spinosa (Molina) Kuntze or Tara spinosa, commonly known as tara, is a thorny shrub native to Peru. For these purposes, tara residues (TR) from the production process are used to extract cellulose microfibres (CMF). First, TR are treated in basic mediums; then, they are transferred to an acidic medium. Finally, they are ground in a cutting mill for a short period of time. Scanning electron microscopy was used to characterize CMF. Fibre sizes of approximately 10 μm in length and 300–500 nm in diameter were observed. The crystallinity index calculated from X-ray patterns was defined at 77%. Infrared spectroscopy showed that treating TR with chemical products produces TR delignification. The dye adsorption tests (basic yellow, basic blue 41, basic blue 9 and basic green 4) in water demonstrated that isotherms adjust to the Langmuir model, with maximum respective adsorption values of 43.6, 45.5, 75.0 and 112.2 mg.g−1 for each dye. [Figure not available: see fulltext.]

    Original languageEnglish
    Article number518
    JournalWater, Air, and Soil Pollution
    Volume231
    Issue number10
    DOIs
    StatePublished - 1 Oct 2020

    Keywords

    • Caesalpinia spinosa
    • Dyes
    • Microfibres
    • Tara
    • Water

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