Investigation of adsorption of methylene blue from aqueous phase onto coal-based activated carbons

B. Purevsuren, Ya Hsuan Liou, Ya Davaajav, A. Ariunaa, S. Batbileg, B. Avid, S. Jargalmaa, Y. Huang, Chin Jung Lin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We prepared activated carbons (ACs) from coal samples ranking from lignite to anthracite. The pore structures and surface functional groups of the obtained ACs were examined by nitrogen adsorption isotherm, field-emission scanning electron microscopy, Fourier transform infrared spectroscopy, and Boehm’s titration method. Isothermal adsorption experiments using methylene blue (MB) solution were conducted to evaluate the adsorption capacities of the ACs. The obtained ACs had different sorption properties due to their differences in structural characteristics and surface chemical groups. The maximum adsorption was achieved using the ACs made from low-ranked lignite coals. The MB adsorption process could be described well by the intra-particle diffusion model with a wide range of effective diffusion coefficients. The results indicated that both the proportion of mesopores and the number of basic sites within the ACs mainly governed the MB adsorption capacities.

Original languageEnglish
Pages (from-to)355-360
Number of pages6
JournalJournal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Volume40
Issue number4
DOIs
StatePublished - 19 May 2017

Keywords

  • adsorption
  • Coal-based activated carbon
  • intra-particle diffusion model
  • methylene blue

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