Disinfection of water with new chitosan-modified hybrid clay composite adsorbent.

Journal: Heliyon
Published Date: Aug 30, 2017

Abstract

Hybrid clay composites were prepared from Kaolinite clay and seeds via modification with chitosan, Alum, NaOH, and ZnCl in different ratios, using solvothermal and surface modification techniques. Several composite adsorbents were prepared, and the most efficient of them for the removal of gram negative enteric bacteria was the hybrid clay composite that was surface-modified with chitosan, Ch-nHYCA (Chitosan: nHYCA = 1:5). This composite adsorbent had a maximum adsorption removal value of 4.07 × 10 cfu/mL for after 120 min, 1.95 × 10 cfu/mL for after ∼180 min and 3.25 × 10 cfu/mL for after 270 min. The Brouers-Sotolongo model was found to better predict the maximum adsorption capacity ( ) of Ch-nHYCA composite adsorbent for the removal of with a of 103.07 mg/g (7.93 × 10 cfu/mL) and with a of 154.18 mg/g (1.19 × 10 cfu/mL) while the Sips model best described adsorption by Ch-nHYCA composite with an estimated of 83.65 mg/g (6.43 × 10 cfu/mL). These efficiencies do far exceed the alert/action levels of ca. 500 cfu/mL in drinking water for these bacteria. The simplicity of the composite preparation process and the availability of raw materials used for its preparation underscore the potential of this low-cost chitosan-modified composite adsorbent (Ch-nHYCA ) for water treatment.

Authors

  • Emmanuel I Unuabonah
    Environmental & Chemical Processes Research Laboratory, Department of Chemical Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Adewale Adewuyi
    Environmental & Chemical Processes Research Laboratory, Department of Chemical Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Matthew O Kolawole
    Department of Microbiology, University of Ilorin, Ilorin, Kwara State, Nigeria.
  • Martins O Omorogie
    Environmental & Chemical Processes Research Laboratory, Department of Chemical Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Olalekan C Olatunde
    Environmental & Chemical Processes Research Laboratory, Department of Chemical Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Scott O Fayemi
    Department of Biological Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Christina Günter
    Department of Earth and Environmental Science, University of Potsdam, D-14476 Potsdam, Germany.
  • Chukwunonso P Okoli
    Adsorption & Catalysis Research Laboratory, Department of Chemistry, Vaal University of Technology, Private Bag X021, Andries Potgieter Boulevard, Vanderbijlpark, 1900, South Africa.
  • Foluso O Agunbiade
    Environmental & Chemical Processes Research Laboratory, Department of Chemical Sciences, Redeemer's University, P.M.B 230, Ede, Osun State, Nigeria.
  • Andreas Taubert
    Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany.

Keywords

No keywords available for this article.

External Resources

Popular Topics
Recent Journals