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Adsorption Characteristics of Pesticides in Zeolites

  • Chang-Han, Lee (Department of Environmental Adminstration, Catholic University of Pusan) ;
  • Kil-Seong, Kim (Research Institute of Health and Environment, Jeju Special-Governing Province) ;
  • Sang-Kyu, Kam (Department of Environmental Engineering, Jeju National University)
  • Received : 2022.11.13
  • Accepted : 2022.12.07
  • Published : 2022.12.31

Abstract

The adsorption characteristics of four pesticides (phosphamidon, fenitrothion, triadimefon, and diniconazole) on natural clinoptilolite (CLIN) and three synthetic zeolites were investigated. The synthetic zeolites included faujasite (FAUF) synthesized from coal fly ash; the mixture of FAU and Na-P1 (FAU + Na-P1)SF synthesized using Jeju scoria and coal fly ash at the ratio of 1.5 by weight; and waste fluid catalytic cracking catalyst (FCCW). The distribution coefficient, KD and the Freundlich constant, KF decreased in the following sequence: FCCW > FAUF > (FAU + Na-P1)SF > CLIN among the zeolites and diniconazole>fenitrothion> triadimefon> phosphamidon among the pesticides. The pesticide adsorptivity increased with increasing temperature for FAUF, (FAU+Na-P1)SF and FCCW, however, it decreased for CLIN, regardless of the type of pesticide. The adsorptivity of pesticides was independent of pH for phosphamidon, fenitrothion and triadimefon, whereas it decreased with increasing pH for diniconazole, regardless of zeolite type.

Keywords

Acknowledgement

This research was supported by the 2022 scientific promotion program funded by Jeju National University.

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