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Trichloroethylene adsorption from aqueous solutions by activated carbons

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(3), pp.281-287
  • DOI : 10.1007/s42823-019-00096-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : April 4, 2019
  • Accepted : October 18, 2019
  • Published : June 1, 2020

Krasnova Tamara A. 1 Belyaeva Oxana V. 1 Gorelkina Alena K. 1 Timoshchuk Irina V. 1 Gora Natalia V. 1 Golubeva Nadezhda S. 1

1Kemerovo State Universit

Accredited

ABSTRACT

We studied trichloroethylene (TCE) adsorption from aqueous solutions in equilibrium conditions by activated carbons (AC). They difer in raw materials, porous structure characteristics and chemical state of the surface. TCE adsorption isotherms were found to have a concave shape, which is characteristic of a sorbent—sorbate weak interaction. It can be a result from electrostatic repulsion of organic matter molecule from polar groups on carbon surface and adsorbed water molecules. The basic parameters of adsorption were calculated by the Dubinin–Radushkevich equation. We determined that for AG-OV-1 and SKD-515 in the coordinates of the Dubinin–Radushkevich equation, there are two linear plots suggesting adsorption in pores of diferent sizes or reorientation of adsorbate molecules on the activated carbon surface. The efciency of TCE removal by the activated carbons was evaluated. To reduce the TCE to the maximum allowable, the lowest sorbent consumption was observed for AC with the highest values of surface area and micropore volume. However, the high cost and hydrophobicity of these adsorbents make it impractical to use them in adsorption columns with a fxed layer. We ofered an adsorbent that reasonably combines extraction efciency, ease of operation and economic feasibility.

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Total Citation Counts(KCI+WOS) (7) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (8) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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