Enhanced removal of Methyl Orange from aqueous solution by Chitosan-CaCl2 beads

Voon Loong Wong, S. Y. Tay, S. S. Lim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)
40 Downloads (Pure)


Use of low-cost and environmental friendly sorbents has been studied as an ideal alternative to the current costly methods of removing textile dyes especially methyl orange from wastewater. In present study, the adsorption affinity of chitosan (CS)-CaCl 2 beads towards anionic acid dye, methyl orange was investigated by performing batch adsorption experiments. The surface morphology and elemental composition of CS-CaCl 2 beads were examined using Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray Spectroscopy (EDX) respectively. The effects of initial dye concentration (20 to 100 mg/L), adsorbent dosage (0.05 g to 0.5 g), contact time (0 to 48 h), and agitation speed (0 to 300 rpm) were also studied to evaluate the efficacy of adsorption. Adsorption isotherm data of CS-CaCl 2 fitted well to Langmuir (R 2 = 0.9964) isotherm model, indicating that homogenous adsorbent surface. Kinetic studies showed that the sorption process followed pseudo-second-order rate that involves chemisorption process, indicating that the adsorption nature of dye on CS-CaCl 2 adsorbent. Based on the results, CS-CaCl 2 beads could be alternative cost effective adsorbents gaining prominence as a method for the removal of anionic acid dye from textile effluent. In conclusion, this study demonstrated a profound impact on improvement in water quality.

Original languageEnglish
Title of host publicationEnergy Security and Chemical Engineering Congress 2019
PublisherIOP Publishing
Publication statusPublished - 4 Mar 2020
EventEnergy Security and Chemical Engineering Congress 2019 - Kuala Lumpur, Malaysia
Duration: 17 Jul 201919 Jul 2019

Publication series

NameIOP Conference Series: Materials Science and Engineering
PublisherIOP Publishing
ISSN (Print)1757-8981


ConferenceEnergy Security and Chemical Engineering Congress 2019
Abbreviated titleESChE 2019
CityKuala Lumpur

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)


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