Chitosan nanoparticles on a natural zeolite as an efficient adsorbent for Congo red

Y. Yulizar, T. Utari, D. O.B. Apriandanu, Y. R.P. Putri

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


Congo red is a toxic synthetic dye that cannot be readily degraded by conventional methods, thus posing a risk to the environment. The increased use of this dye is mainly due to developments in the textile industry. A possible way to reduce the Congo-red waste is by performing the adsorption processes; therefore, in this study, we used a natural zeolite from Bayah and modified it using chitosan nanoparticles (Na-zeolite@chitosan) to increase its adsorption capacity. The obtained Na-zeolite@chitosan material, which was able to efficiently adsorb Congo red, was further characterized by ultraviolet-visible (UV-Vis) and Fouriertransform infrared (FTIR) spectroscopy as well as by transmission electron microscopy (TEM). A maximum of 98.019% of the Congo red was adsorbed at a concentration of 800 ppm and a pH of 5 for 60 min (the adsorption capacity was 0.00428 mmol/g). Our results exhibit that Congo red adsorption on Na-zeolite@chitosan follows the Freundlich adsorption isotherm and can be described using a pseudo-second-order kinetic model.

Original languageEnglish
Article number012005
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 22 Feb 2019
Event2nd International Conference on Current Progress in Functional Materials 2017, ISCPFM 2017 - Bali, Indonesia
Duration: 8 Nov 20179 Nov 2017


  • adsorbent
  • chitosan
  • congo red
  • natural zeolite


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