A granular adsorbent-supported Fe/Ni nanoparticles activating persulfate system for simultaneous adsorption and degradation of ciprofloxacin

doi:10.1016/j.cjche.2019.12.019

Abstract

Abstract: In this work, Fe/Ni nanoparticles were produced through Fe(Ⅱ) and Ni(Ⅱ) reduction by NaBH₄ and they were stabilized by a kind of prepared granular adsorbent (Fe/Ni@PGA). Fe/Ni@PGA as an environment-friendly activator was used to activate persulfate (PS) for the removal of ciprofloxacin from aqueous solution. Fe/Ni@PGA was systematically characterized via Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The effects of PS concentration, initial solution pH, Fe/Ni@PGA dosage, initial ciprofloxacin concentration, reaction temperature, anions, and natural organic matters on the removal of ciprofloxacin by Fe/Ni@PGA/PS were analyzed. The removal efficiency of ciprofloxacin by Fe/Ni@PGA/PS was 93.24% under an initial pH of 3.0, PS concentration of 10 mM, Fe/Ni@PGA dosage of 0.1 g, and reaction temperature of 30 ℃. Fe/Ni@PGA could still exhibit high catalytic activity after nine cycles of regeneration. The removal mechanisms for ciprofloxacin by the Fe/Ni@PGA/PS system were proposed. In summary, the Fe/Ni@PGA/PS system could be applied as a promising technology for ciprofloxacin removal.

Key words: Fe/Ni@PGA, Ciprofloxacin, Persulfate, Sulfate radical, Oxidation, Adsorption

摘要： In this work, Fe/Ni nanoparticles were produced through Fe(Ⅱ) and Ni(Ⅱ) reduction by NaBH₄ and they were stabilized by a kind of prepared granular adsorbent (Fe/Ni@PGA). Fe/Ni@PGA as an environment-friendly activator was used to activate persulfate (PS) for the removal of ciprofloxacin from aqueous solution. Fe/Ni@PGA was systematically characterized via Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The effects of PS concentration, initial solution pH, Fe/Ni@PGA dosage, initial ciprofloxacin concentration, reaction temperature, anions, and natural organic matters on the removal of ciprofloxacin by Fe/Ni@PGA/PS were analyzed. The removal efficiency of ciprofloxacin by Fe/Ni@PGA/PS was 93.24% under an initial pH of 3.0, PS concentration of 10 mM, Fe/Ni@PGA dosage of 0.1 g, and reaction temperature of 30 ℃. Fe/Ni@PGA could still exhibit high catalytic activity after nine cycles of regeneration. The removal mechanisms for ciprofloxacin by the Fe/Ni@PGA/PS system were proposed. In summary, the Fe/Ni@PGA/PS system could be applied as a promising technology for ciprofloxacin removal.

关键词: Fe/Ni@PGA, Ciprofloxacin, Persulfate, Sulfate radical, Oxidation, Adsorption

Jiwei Liu, Yufeng Du, Wuyang Sun, Quanchao Chang, Changsheng Peng. A granular adsorbent-supported Fe/Ni nanoparticles activating persulfate system for simultaneous adsorption and degradation of ciprofloxacin[J]. Chinese Journal of Chemical Engineering, 2020, 28(4): 1077-1084.

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