Removal of reactive blue 19 by encapsulating lactobacillus casei into freeze-dried chitosan beads

Chi Him Jim Luk, Yiu Wan Yip, Chun Wah Marcus Yuen, Kim Hung Lam

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The release of dye residue into water has been threatening human health and the aquatic ecosystem for decades. Chitosan is one of the natural abundant biomasses that show excellent adsorption toward colorants. Nevertheless, sophisticated chemical modifications of chitosan are usually required to maintain its physical and chemical stabilities in practical applications. In the present study, simple freeze-drying has been applied to chitosan beads which show good stability at low pHs. The results show complete decolourization of Reactive Blue 19 (RB19) within 2 hours with a pH of 3 at a temperature of 37 °C. The encapsulation of live bacterium Lactobacillus casei (L. casei) into chitosan beads for dyestuff removal is also performed. Kinetics studies show a faster initial rate of adsorption by L. casei chitosan beads with a pH of 3 at a temperature of 37 °C. The adsorptions partially follow the intraparticle diffusion mechanism.
Original languageEnglish
Title of host publicationTextile Bioengineering and Informatics Symposium Proceedings 2014 - 7th Textile Bioengineering and Informatics Symposium, TBIS 2014, in conjunction with the 5th Asian Protective Clothing Conference, APCC 2014
PublisherBinary Information Press
Pages101-107
Number of pages7
Publication statusPublished - 1 Jan 2014
Event7th Textile Bioengineering and Informatics Symposium, TBIS 2014, in conjunction with the 5th Asian Protective Clothing Conference, APCC 2014 - The Hong Kong Polytechnic University, Hong Kong, Hong Kong
Duration: 6 Aug 20148 Aug 2014

Conference

Conference7th Textile Bioengineering and Informatics Symposium, TBIS 2014, in conjunction with the 5th Asian Protective Clothing Conference, APCC 2014
Country/TerritoryHong Kong
CityHong Kong
Period6/08/148/08/14

Keywords

  • Chitosan
  • Freeze-drying
  • Lactobacillus casei
  • Reactive blue 19
  • Removal

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials

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