Adsorption of methylene blue using acid activated green color natural zeolite from ende-flores, Indonesia

Yantus A.B. Neolaka, Eka B.S. Kalla, Gusti A. Malelak, Nia K. Rukman, Ganden Supriyanto, Ni Nyoman Tri Puspaningsih

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


The natural zeolite green color (GCNZ) from Ende-Flores, Indonesia has been activated with several acid solution series, characterized by XRF spectroscopy and used for methylene blue (MB) adsorption from aqueous solution. The characteristic of XRF showed that the natural zeolite has mainly composed of mordenite with Si/Al ratio of GCNZ before and after acid activated is 7.34 % and 16.28 % respectively. Surface area study was found out using the methylene blue adsorption method whereas adsorption process was done by the batch system. It was shown that average of surface area for GCNZ and activated green color natural zeolite (AGCNZ) is 49.069 m2/mol and 265.946 m2/mol respectively. The maximum adsorption capacity of MB onto the surface of GCNZ is 42.441 mg/g whereas AGCNZ is 87.592 mg/g. Kinetic modeling studies showed the adsorption process fits with pseudo-first-order rate mechanism. Isotherm studies show that adsorption process is best to describe by Freundlich isotherm model. Also, the thermodynamic process indicates that adsorption is an exothermic process and spontaneous.

Original languageEnglish
Pages (from-to)494-504
Number of pages11
JournalRasayan Journal of Chemistry
Issue number2
Publication statusPublished - 1 Apr 2018


  • Activated
  • Adsorption
  • Green color acid
  • Methylene blue
  • Natural zeolite


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