Skip to main content

The removal of oxytetracycline (OTC) by potassium ferrate (VI) in aquatic environment

  • Authors (legacy)
    Corresponding: WANG H.Y
    Co-authors: Zeng FC
    Liu YB
    Wang HY
    Download PDF
  • gnest_01951_published.pdf
  • Paper ID
    gnest_01951
  • Paper status
    Published
  • Date paper submitted
  • Date paper accepted
  • Date paper online
DOI
https://doi.org/10.30955/gnj.001951
Abstract

The treatment of oxytetracycline (OTC) in test solutions by ferrate (VI) was investigated aiming to propose the effects of pH, concentration of co-existing ions and humic acid on the OTC removal. Ferrate (VI) can remove 97% OTC (from 1000 µg·l-1) in 30 minutes under the optimal conditions with solution pH of 7 and ferrate (VI) dosage of 20:1 as a molar ratio of ferrate (VI)/OTC. The effects of co-existing ions (0.005 mol·l-1 and 0.02 mol·l-1) and humic acid (0.1~50 mg·l-1) on the OTC removal were investigated for the optimal operating conditions. The results showed that Ca2+, CO32-, PO43-could inhibit the OTC degradation and its removal rate decreased from 79, 29, 29% to 70, 19, 19%, for the ion concentration increased from 0.005
mol·l-1 to 0.02 mol·l-1. Mg2+ and HCO3- could restrain the reaction carried out at 0.02 mol·l-1 and the removal rate was only 59%, 62%. Al3+could increase the removal rate which reach to 100%. Humic acid with concentrations of greater than 10 mg·l-1 could notably inhibit the OTC removal. Regression analysis indicated good fit of the experimental date to the developed model with coefficient of determination (R2) value of 0.9991 and the adjusted R2 value of 0.9978.

 

Keywords
VI ferrate oxytetracycline Humic acid co-existing Box–Behnken design
Cite this article
Zeng, F. et al. (2016) “The removal of oxytetracycline (OTC) by potassium ferrate (VI) in aquatic environment”, Global NEST Journal, 18(2). Available at: https://doi.org/10.30955/gnj.001951.
PDF file
  • gnest_01951_published.pdf