Column study on Cr(VI)-reduction using the brown seaweed Ecklonia biomass

Donghee Park, Yeoung Sang Yun, Dae Sung Lee, Seong Rin Lim, Jong Moon Park

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The potential use of the brown seaweed, Ecklonia, biomass as a bioreductant for reducing Cr(VI) was examined in a continuous packed-bed column. The effects of the operating parameters, such as influent Cr(VI) concentration, influent pH, biomass concentration, flow rate and temperature, on the Cr(VI) reduction were investigated. Increases in the influent Cr(VI) concentration and flow rate or a decrease in the biomass concentration inside the column led to a higher breakthrough of the Cr(VI) ions in the effluent. Particularly, the influent pH and temperature most significantly affected on the breakthrough curve of Cr(VI); a decrease in the influent pH or an increase in the temperature enhanced the Cr(VI) reduction in the column. For process application, a non-parametric model using neural network was used to predict the breakthrough curves of the column. Finally, the potential of the column packed with Ecklonia biomass for Cr(VI) detoxification was demonstrated.

Original languageEnglish
Pages (from-to)1377-1384
Number of pages8
JournalJournal of Hazardous Materials
Volume137
Issue number3
DOIs
StatePublished - 11 Oct 2006

Keywords

  • Column
  • Detoxification
  • Ecklonia
  • Hexavalent chromium
  • Neural network

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