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Removal of endrin and dieldrin isomeric pesticides through stereoselective adsorption behavior on the graphene oxide-magnetic nanoparticles.
Shrivas, Kamlesh; Ghosale, Archana; Nirmalkar, Nidhi; Srivastava, Arti; Singh, Sunil Kumar; Shinde, Sandip S.
Afiliación
  • Shrivas K; Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, India. kshrivas@gmail.com.
  • Ghosale A; School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, 492010, India. kshrivas@gmail.com.
  • Nirmalkar N; Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, India.
  • Srivastava A; Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, India.
  • Singh SK; Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, India.
  • Shinde SS; Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, India.
Environ Sci Pollut Res Int ; 24(32): 24980-24988, 2017 Nov.
Article en En | MEDLINE | ID: mdl-28918582
ABSTRACT
A novel stereoselective removal behavior of isomeric endrin and dieldrin pesticides from sample solution is demonstrated using nanocomposite of graphene oxide (GO) and iron oxide (Fe3O4) magnetic nanoparticles (MNPs). The removal efficiency of endrin and dieldrin was found higher when GO-MNPs was used as a separating probe than the individual use of GO and MNPs. The removal efficiency of both the pesticides was found to be more favorable when the dosage amount of GO-MNPs was 30 mg for 30-min contact time with pH 4.0 at room temperature. The good correlation of determination (R 2) with 0.975 and 0.973 values obtained for endrin and dieldrin, respectively demonstrated a well fitting of Langmuir adsorption isotherm model. The higher removal percentage (86.0%) and higher slope value of Langmuir adsorption isotherm were estimated for endrin compared to dieldrin (74.0%). The reason for higher adsorption percentage of endrin is due to the endo-position of oxygen atom in molecule favors more interaction of molecules with GO-MNPs compared to the exo-position of oxygen present in dieldrin. In addition, the higher value of R 2 for endrin and dieldrin demonstrated better suitability of pseudo-first-order and pseudo-second-order kinetic models, respectively. The advantages of the present method are use of simple UV-vis spectrophotometry for monitoring and low-cost use of GO-MNPs nanomaterial for the removal of pesticides from sample solution.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Férricos / Dieldrín / Endrín / Grafito Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: India

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Férricos / Dieldrín / Endrín / Grafito Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: India