Environmental Science and Pollution Research

, Volume 26, Issue 32, pp 33631–33641 | Cite as

Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions

  • Kadir ErolEmail author
  • Emrecan Yıldız
  • İhsan Alacabey
  • Muharrem Karabörk
  • Lokman Uzun
Research Article


Pesticides are highly hazardous chemicals for the environment and human health and their use in agriculture is constantly increasing. Although 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane 4,4′-DDT was banned at developed countries, it is still one of the most dangerous of chemical due to accumulation in the environment. It is known that the toxicity of DDT affects some enzyme systems biochemically. The main motivation of this study is to develop an effective adsorbate for the removal DDT, which was chosen as a model hydrophobic pesticide, out of aqueous systems. For this purpose, the bare diatomite particles were magnetically modified and a hydrophobic ligand attached to enhance its adsorptive and physio-chemical features. Under optimal conditions, a high adsorption capacity, around 120 mg/g with the hydrophobic and magnetic diatomite particles, modification of the diatomite particles reduced average pores diameter whereas surface area and total pore volume increased (around 15-folds). After five consecutive adsorption–desorption cycles, no significant decrease in adsorption capability was observed. The adsorption isotherms (Langmuir, Freundlich, and Flory–Huggins) applied to the data indicated that the adsorption process occurred via monolayer adsorption in an entropy-driven manner. The kinetic data also revealed the quick adsorption process without any diffusion limitations.

Graphical Abstract


Diatomite Magnetite Hydrophobic Pesticide DDT Removal 



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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Property Protection and Security, Osmancık Ömer Derindere Vocational SchoolHitit UniversityOsmancıkTurkey
  2. 2.Department of Chemistry, Faculty of ScienceHacettepe UniversityAnkaraTurkey
  3. 3.Vocational School of Health ServicesMardin Artuklu UniversityMardinTurkey
  4. 4.Department of Chemistry, Faculty of Arts and SciencesKahramanmaraş Sütçü İmam UniversityKahramanmaraşTurkey
  5. 5.Advanced Technologies Application and Research CenterHacettepe UniversityAnkaraTurkey

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