Different solvents for the regeneration of the exhausted activated carbon used in the treatment of coking wastewater

  • Guo D
  • Shi Q
  • He B
 et al. 
  • 49

    Readers

    Mendeley users who have this article in their library.
  • 61

    Citations

    Citations of this article.

Abstract

The solvents n-pentane, methylene dichloride, ethyl ether and dodecylbenzenesulphonic acid sodium were used to regenerate exhausted activated carbon used in the process of treating coking wastewater, and the efficiency, ability, and optimum conditions of the different solvents on this regeneration were investigated. The results indicate that n-pentane could effectively remove refractory organic compounds in the coking wastewater adsorbed on the surface of activated carbon and could repeatedly regenerate the exhausted activated carbon to recover its adsorption activity. Under the conditions of a regeneration time of 20. min, a regeneration temperature of 25 °C, an activated carbon drying time of 300. min, and an activated carbon drying temperature of 150 °C, n-pentane had the best regeneration efficiency, at 98.27%, for exhausted activated carbon. Gas chromatography-mass spectrometry analysis results show that the nature of the activated carbon regenerated by organic solvents had no remarkable change in adsorption for the main types of organic compounds in coking wastewater. The good regenerative effect of n-pentane on the activated carbon may be due its stronger desorption of esters embedded within the internal structure of activated carbon. © 2010 Elsevier B.V.

Author-supplied keywords

  • Activated carbon
  • Coking wastewater
  • Organic solvent
  • Regeneration

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free