Cold catalytic recovery of loaded activated carbon using iron oxide-based nanoparticles

Altai Bach, Grigory Zelmanov, Raphael Semiat*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A novel approach for the recovery of spent activated carbon by an advanced oxidation process using iron oxide-based nanocatalysts was proposed and investigated. Model organic contaminants, such as ethylene glycol and phenol, were chosen for this study as water pollutants. It was shown that there are several advantages in using catalytic oxidation recovery of activated carbon with iron oxide-based nanocatalysts: low temperature reactivity of catalytic recovery without heating; and a relatively large number of adsorption-recovery cycles, without a reduction in the adsorptive properties of the virgin activated carbon or without a performance decrease from the first adsorption-recovery cycle of the new modified adsorptive properties of the activated carbon. The catalytic recovery takes place without ultraviolet light or any visible radiation sources. Results show a high efficiency of catalytic recovery of spent activated carbon using iron oxide-based nanocatalysts. A 97-99% efficiency of spent activated carbon catalytic regeneration was achieved under chosen conditions after 15-20 min of reaction. The process may be also considered as cold in situ recovery of active carbon.

Original languageEnglish
Pages (from-to)163-168
Number of pages6
JournalWater Research
Volume42
Issue number1-2
DOIs
StatePublished - Jan 2008
Externally publishedYes

Keywords

  • Activated carbon
  • AOP
  • Ethylene glycol
  • Iron oxide
  • Nanocatalyst
  • Organic pollutants
  • Phenol
  • Water treatment

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