PREPARATION OF Fe/C CATALYST BASED ON FERRIC CITRATE AND ITS ACTIVATION PERFORMANCE ON PEROXYDISULFATE TO DEGRADE SULFADIAZINE

YANG Jiani; ZHAO Baowei; YANG Maoying; SUO Jinmiao; ZHU Zhengyu; DENG Aiqin

doi:10.13205/j.hjgc.202307016

Volume 41 Issue 7

Jul. 2023

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YANG Jiani, ZHAO Baowei, YANG Maoying, SUO Jinmiao, ZHU Zhengyu, DENG Aiqin. PREPARATION OF Fe/C CATALYST BASED ON FERRIC CITRATE AND ITS ACTIVATION PERFORMANCE ON PEROXYDISULFATE TO DEGRADE SULFADIAZINE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 116-123,251. doi: 10.13205/j.hjgc.202307016

Citation:

YANG Jiani, ZHAO Baowei, YANG Maoying, SUO Jinmiao, ZHU Zhengyu, DENG Aiqin. PREPARATION OF Fe/C CATALYST BASED ON FERRIC CITRATE AND ITS ACTIVATION PERFORMANCE ON PEROXYDISULFATE TO DEGRADE SULFADIAZINE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 116-123,251. doi: 10.13205/j.hjgc.202307016

Citation:

YANG Jiani, ZHAO Baowei, YANG Maoying, SUO Jinmiao, ZHU Zhengyu, DENG Aiqin. PREPARATION OF Fe/C CATALYST BASED ON FERRIC CITRATE AND ITS ACTIVATION PERFORMANCE ON PEROXYDISULFATE TO DEGRADE SULFADIAZINE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 116-123,251. doi: 10.13205/j.hjgc.202307016

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PREPARATION OF Fe/C CATALYST BASED ON FERRIC CITRATE AND ITS ACTIVATION PERFORMANCE ON PEROXYDISULFATE TO DEGRADE SULFADIAZINE

doi: 10.13205/j.hjgc.202307016

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Received Date: 2022-10-28

Abstract

Abstract

In response to the current situation that various raw materials, high costs and complicated process in the preparation of Fe/C catalysts to activate persulfates, four Fe/C catalysts were prepared by a high-temperature carbonization method at different pyrolysis temperatures (700, 800, 900 and 1000℃) using inexpensive and environmentally friendly ferric citrate as raw material, and then characterized by SEM, EDS, BET, XRD, XPS. Four Fe/C catalysts were used for the adsorption and activation of peroxydisulfate (PDS) for the degradation of sulfadiazine (SDZ). After initial screening, Fe/C-800 catalyst obtained at 800℃ was used as the target catalyst for an in-depth study. The performance of its activation of PDS to degrade SDZ and the mechanism of action were analyzed. The results showed that the degradation rate of 98.8% can be achieved for 10 mg/L SDZ by 0.05 g/L Fe/C-800 and 1 mmol/L PDS. The Fe/C-800 catalyst had a wide range of pH, could achieve the efficient degradation of different concentrations of SDZ even at a low dosing rate, and demonstrated good recycling performance. Fe⁰ and C could promote the conversion of Fe³⁺ into Fe²⁺, and the amount of ferri & ferrous iron ions dissolved at the end of the reaction was as low as 0.3182 mg/L. Both free radical and non-free radical pathways existed in the reaction system, in which SO₄^-·, O₂^-·, and ¹O₂ played the dominant roles in the degradation process of SDZ. The study may provide new ideas for the activation of Fe/C non-homogeneous catalysts to degrade organic pollutants by PDS.
- ferric citrate,
- high temperature carbonation method,
- peroxydisulfate,
- catalytic degradation,
- sulfadiazine

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References(47)

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