Degradation of aquatic sulfadiazine by Fe<sup>0</sup>/persulfate: kinetics, mechanisms, and degradation pathway

Shidong, Yang; Che, Di

doi:10.1039/c7ra07920f

Cited by 64 publications

(21 citation statements)

References 49 publications

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“…On the contrary, both ·OH and SO 4 ·– species were identified with the characteristic peaks of DMPO–HO and DMPO–SO 4 adducts, respectively. Additionally, the intensity of DMPO–OH signals in the spectra was much stronger than that of DMPO–SO 4 , which was ascribed to the fast transformation from DMPO–SO 4 to DMPO–OH though the nucleophilic substitution. − Furthermore, in order to have an idea about the active component, the ZnO–Co 3 O 4 /N–C was treated with NaOH and HNO 3 to tenderly remove the ZnO as well as ZnO and Co 3 O 4 , respectively. The catalytic results are shown in Figure S13, and the degradation rates were estimated to be 0.157 and 0.036 min –1 after NaOH and HNO 3 treatment, respectively.…”

Section: Resultsmentioning

confidence: 99%

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

Bai

Zhang

et al. 2021

Inorg. Chem.

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The zeolitic imidazolate framework (ZIF)-67 microcrystal was employed as a precursor to synthesize the hollow ZIF-8/ZIF-67 composite via the epitaxial growth of ZIF-8 on ZIF-67, in situ self-sacrifice, and excavation of ZIF-67. The hollow ZIF-8/ZIF-67 composite was successfully transformed to the ZnO–Co3O4/N–C cage by thermal treatment, which was further used as the catalyst for the oxidative degradation of bisphenol A (BPA) in the presence of potassium persulfate (PS). In comparison with the Co3O4/N–C and Co3O4 obtained from pure ZIF-67 and cobalt nitrate, the ZnO–Co3O4/N–C cage demonstrated a more than four fold-higher activity and robust reusability. Based on structural analysis, the enhanced catalytic performance could be ascribed to the small, highly dispersed cobalt oxide particles, the hollow structure that facilitated the transportation of the molecules, and the synergistic effect between cobalt oxide and nitrogen-doped carbon in the composite. Besides, the effect of dosage of PS, BPA, and the co-existing components such as chloride ion, methanol, and t-butyl alcohol was carefully investigated to propose the possible mechanism. This study would give new insights into the design of functional composite materials from metal organic frameworks and the development of their application in environmental pollution disposal.

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Section: Resultsmentioning

confidence: 99%

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

Bai

Zhang

et al. 2021

Inorg. Chem.

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“…In practice, organic wastewater contains a variety of complex components, which can scavenge active radicals and reduce the degradation ratio of pollutants. 36 Typically, the effects of different inorganic anions (Cl − , SO 4 2− , CO 3 2− , NO 3 − ) on the degradation of RhB in the K-Fe 2 O 3 /PS/visible light system were studied. From Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Some of the SO 4 ˙ − radicals in the system are consumed, which leads to a decrease in the utilization of SO 4 ˙ − ( eqn (4) ). 18 Ferric ions are prone to precipitation under alkaline conditions, resulting in secondary pollution. In recent years, heterogeneous catalysts have attracted the attention of researchers, and can overcome the shortcomings mentioned above.…”

Section: Introductionmentioning

confidence: 99%

The efficient degradation of organic pollutants in an aqueous environment under visible light irradiation by persulfate catalytically activated with kaolin-Fe₂O₃

Xie

Gan

et al. 2020

RSC Adv.

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In recent years, persulfate (PS) has been widely studied as a promising oxidant. In this work, a new K-Fe 2 O 3 catalyst was synthesized via a facile impregnation method. K-Fe 2 O 3 samples were utilized as heterogeneous photocatalysts for the degradation of aquatic organic pollutants (rhodamine, RhB, and ciprofloxacin, CIP). The catalysts showed excellent catalytic activity in the presence of PS under the irradiation of visible light, owing to the generation of SO 4 c À and $OH active radicals. The degradation ratio and COD removal ratio for RhB were 99.8% and 88.3%. More importantly, the system retained a high degradation activity for RhB within a wide operating pH range of 2.9-10. The results of cycling degradation experiments confirmed that the K-Fe 2 O 3 catalyst was stable and recoverable. Large-scale experiments for treating dye wastewater under irradiation by natural sunlight were carried out, showing that this study can provide a new perspective for the treatment of wastewater.

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“…The apparent signals of DMPO‐OH and DMPO‐SO 4 adducts could be observed, suggesting that both SO 4 − • and OH• contributed to TC degradation . Besides, the intensity of DMPO‐OH was higher than that of DMPO‐SO 4 , which was ascribed to the rapid transition from DMPO‐SO 4 to DMPO‐OH via nucleophilic substitution (Equations 12 and 13) …”

Section: Resultsmentioning

confidence: 99%

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

Luo

Xie

Niu

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Tetracycline (TC) residues in water and soil have received wide attention due to their adverse effects on human health and ecosystem. Layer-structured biogenic manganese oxides (BMOs) could be obtained from fungi Pleosporales sp. Y-5 culture. Cobalt doping into BMOs (Co-BMOs) was conducted by a facile impregnation-calcination method to eliminate TC residues through activation of peroxymonosulfate (PMS). RESULTS: TheTC in aqueous solution could be nearly completely removed in about 10 minutes under the optimal condition ([TC] = 50 mg L −1 , [catalyst] = 0.2 g L −1 , [PMS] = 0.4 g L −1 , 25 ∘ C). The electron paramagnetic resonance (EPR) identified the coexistence of SO 4 − • and OH• during PMS activation. The Co-BMOs catalyst remained great catalytic activity after five runs. Possible mechanism of PMS activation and TC degradation pathway were proposed. Preliminary biological toxicity test using green algae Chlorella vulgaris (FACHB-8) as ecological indicator confirmed that TC degradation solution was less toxic than the original solution. CONCLUSION: This study demonstrated high catalytic activity and stability of Co-BMOs for degradation of TC by PMS activation. The Co-BMOs/PMS system is helpful in new efforts for TC degradation without generation of more toxic intermediates. Industry 0.4 g L −1 PMS followed by adjustment of pH to 7.0. Then the Chlorella vulgaris was treated with 50 mL fresh TC solution and degraded solution, respectively. Cultures were incubated on an orbital shaker (180 rpm, 30 ∘ C) for 120 hours. The concentration J Chem Technol Biotechnol 2019; 94: 752-760

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Degradation of aquatic sulfadiazine by Fe⁰/persulfate: kinetics, mechanisms, and degradation pathway

Abstract: Degradative mechanisms of aquatic sulfadiazine by Fe0/persulfate.

Cited by 64 publications

References 49 publications

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

The efficient degradation of organic pollutants in an aqueous environment under visible light irradiation by persulfate catalytically activated with kaolin-Fe₂O₃

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

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Degradation of aquatic sulfadiazine by Fe0/persulfate: kinetics, mechanisms, and degradation pathway

Abstract: Degradative mechanisms of aquatic sulfadiazine by Fe0/persulfate.

Cited by 64 publications

References 49 publications

ZnO–Co3O4/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

ZnO–Co3O4/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

The efficient degradation of organic pollutants in an aqueous environment under visible light irradiation by persulfate catalytically activated with kaolin-Fe2O3

Cobalt‐doped biogenic manganese oxides for enhanced tetracycline degradation by activation of peroxymonosulfate

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Degradation of aquatic sulfadiazine by Fe⁰/persulfate: kinetics, mechanisms, and degradation pathway

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

ZnO–Co₃O₄/N–C Cage Derived from the Hollow Zn/Co ZIF for Enhanced Degradation of Bisphenol A with Persulfate

The efficient degradation of organic pollutants in an aqueous environment under visible light irradiation by persulfate catalytically activated with kaolin-Fe₂O₃