Effect of pretreatment method on structural changes of coconut coir dust

Hanny F. Sangian, Arief Widjaja*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

The pretreatment of a high lignin substrate, coconut coir dust, was studied by chemical techniques (NaOH solution, ionic liquid, and NaOH followed by ionic liquid) and by a physical method (subcritical water, SCW). Following substrate pretreatment and a washing step, structural analyses were performed by scanning electron microscopy, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy. It was found that all substrates pretreated by chemical methods had more amorphous structures than the untreated substrate. The XRD patterns of the chemically treated substrates shifted toward higher angles by 0.50° to 1.00°. However, the XRD peak symmetry of the SCW-treated substrate did not shift, but its crystallinity index decreased. The results revealed that lignocellulose treated with NaOH followed by ionic liquid at 120 °C for 30 min showed the greatest extent of structural transformation.

Original languageEnglish
Pages (from-to)8030-8046
Number of pages17
JournalBioResources
Volume12
Issue number4
DOIs
Publication statusPublished - 1 Nov 2017
Externally publishedYes

Keywords

  • Ionic liquid
  • Pretreatment
  • Sodium hydroxide
  • Subcritical water

Fingerprint

Dive into the research topics of 'Effect of pretreatment method on structural changes of coconut coir dust'. Together they form a unique fingerprint.

Cite this