Adsorption and photocatalytic detoxification of diazinon using iron and nanotitania modified activated carbons

0478828 - ÚFM 2018 RIV NL eng J - Článek v odborném periodiku
Hassan, A F. - Elhadidy, Hassan - Abdel-Mohsen, A. M.
Adsorption and photocatalytic detoxification of diazinon using iron and nanotitania modified activated carbons.
Journal of the Taiwan Institute of Chemical Engineers. Roč. 75, JUN (2017), s. 299-306. ISSN 1876-1070. E-ISSN 1876-1089
Grant CEP: GA MŠMT(CZ) LQ1601
Institucionální podpora: RVO:68081723
Klíčová slova: Detoxification * Diazinon * Flamboyant pods * Photocatalyst * Characterization
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.849, rok: 2017

Diazinon is used as an insecticide for different types of cultivation. It is considered to be a toxic pollutant. In this work, we present a comparative study of diazinon detoxification by two methods: adsorption and photocatalytic degradation. Chemically activated carbon (AC) was prepared from flamboyant pods. AC was modified with iron (Fe-AC) to be used as a solid adsorbent for diazinon. TiO 2 and TiO 2 -AC, as photocat- alysts for degradation of diazinon, were prepared by the sol-gel method. Textural and surface character- izations of the prepared solid samples were carried out using nitrogen adsorption at -196 °C, scanning electron microscopy (SEM), pH PZC and the Boehme titration method. Adsorption of diazinon was inves- tigated on AC and Fe-AC considering the effects of pH, time, adsorbent dosage and concentration. The results showed that the adsorption capacity of Fe-AC is three times higher than that of AC. Furthermore, as the adsorbent dosage increases, the diazinon removal percentage increases, and adsorption follows pseudo-first- and pseudo-second-order equations. The diazinon photocatalytic degradation efficiency for TiO 2 -AC is higher than that for TiO 2, the diazinon degradation percentage reaches 95% in the case of TiO 2 -AC and only 55% in case of TiO 2 after 80 min.
Trvalý link: http://hdl.handle.net/11104/0274879