Removal of ampicillin sodium in solution using activated carbon adsorption integrated with H2O2 oxidation
✍ Scribed by Guopeng Wang; Tao Wu; Yujiang Li; Dejun Sun; Yan Wang; Xinghai Huang; Guochen Zhang; Ruihong Liu
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2011
- Tongue
- English
- Weight
- 138 KB
- Volume
- 87
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
Abstract
BACKGROUND: The removal of antibiotic ampicillin sodium using H~2~O~2~ and modified granular activated carbon (GAC) is discussed. Two types of modified activated carbons were used in experiment to catalyze ·OH production from H~2~O~2~. One was modified with base (NaOH; called B‐GAC), the other was modified with Fe(NO~3~)~3~ (Fe‐GAC) and the nominal Fe metal loading was 5 wt%. In the experiment, pH, contact time, dosage of activated carbon and H~2~O~2~ and initial concentration of ampicillin sodium were investigated to determine their influence on the removal efficiency. The stability of Fe‐GAC was also evaluated.
RESULTS: With an initial ampicillin sodium concentration of 200 mg L^−1^, 85.2% of chemical oxygen demand (COD) and 76.4% of total organic carbon (TOC) can be removed with 8.0 g L^−1^ of B‐GAC and 80 mg L^−1^ of H~2~O~2~ (at pH 5.0). For the Fe‐GAC/H~2~O~2~ process, with 5.0 g L^−1^ of activated carbon and 80 mg L^−1^ of H~2~O~2~, COD and TOC removal can be elevated to 91.2% and 79.5% (at pH 3.0), respectively.
CONCLUSION: The integration of activated carbon and H~2~O~2~ treatment was more effective for the removal of ampicillin from aqueous solution than using activated carbon alone. In the process, adsorption played a dominant role and the addition of a small amount of H~2~O~2~ accelerated the reaction rate and improved the removal efficiency. pH also greatly affected removal efficiency. Copyright © 2011 Society of Chemical Industry