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

Research output: Contribution to journalArticleResearchpeer-review

13 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 Sept 2020

Keywords

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

Cite this