Removal of triphenylmethane dyes in single-dye and dye-metal mixtures by live and dead cells of metal-tolerant Penicillium simplicissimum

Si Hui Chen, Yuen Lin Cheow, Si Ling Ng, Adeline Su Yien Ting

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    6 Citations (Scopus)

    Abstract

    In the absence of various metal ions, live cells of Penicillium simplicissimum decolorized Crystal Violet (CV), Methyl Violet (MV), Malachite Green (MG) and Cotton Blue (CB) (75.6–90.8%, 0.5–2 h) more efficiently than dead cells (43.9–75.2%, 4 h). Cu(II) enhanced CB removal by live and dead cells (64.1–82.0%) but with Cd(II), Zn(II) and Cr(III), removal of CV, MV and MG were inhibited. Pb(II) inhibited dye removal by live cells (63.1–78.1%), while dead cells remained unaffected (40.6–74.0%). Dye removal was attributed to binding to hydroxyl, carbonyl, amino, phosphoryl and nitro groups based on FTIR analyses. Dye-metal-fungi interactions revealed new binding sites and non-involvement of specific functional groups that previously interacted with single dyes. Hence, this study indicated that isolate 10 (especially live cells) is capable of removing dyes from dye-metal solutions.

    Original languageEnglish
    Pages (from-to)2410-2420
    Number of pages11
    JournalSeparation Science and Technology
    Volume55
    Issue number13
    DOIs
    Publication statusPublished - 1 Sep 2020

    Keywords

    • Bioremediation
    • fungi
    • heavy metals
    • mixtures
    • triphenylmethane dyes

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