The adsorption of Congo red and vacuum pump oil by rice hull ash

Kan Sen Chou, Jyh Ching Tsai, Chieh-Tsung Lo

Research output: Contribution to journalArticle

73 Citations (Scopus)


Rice hull ash (RHA) of large surface area was obtained by acid wash and then calcination at 600°C for 4 h. The white ash was then mixed with kaolin and starch to make pellet adsorbents with reasonable strength to be utilized in a packed column. Both ash and pellet samples showed good adsorption capacities toward the organic substances in wastewater. Furthermore, the surface nature of the white ash and pellet adsorbent could be modified through either hydration or esterification reactions. Corresponding changes in silanol concentrations were successfully correlated to changes in adsorption capacity toward either Congo red or vacuum pump oil molecules.

Original languageEnglish
Pages (from-to)217-219
Number of pages3
JournalBioresource technology
Issue number2
Publication statusPublished - 2001 Mar 26

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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