期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 260, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118203
关键词
Sulfurized; Tetracycline; Heterogeneous Fenton; Mechanism; Pathway
资金
- National Natural Science Foundation of China [41572029, 41872040]
- Fundamental Research Funds for the Central Universities [PA2019GDQT0009]
A sulfurized oolitic hematite (SOH-600) was prepared successfully via annealing oolitic hematite in hydrogen sulfide and was investigated as a heterogeneous Fenton catalyst for the degradation of tetracycline. The physicochemical properties of SOH-600 before and after reaction were characterized by XRF, XRD, XPS, SEM and FT-IR. The influence of the experimental parameters on the performance of SOH-600, including SOH-600 dosage, initial H2O2 concentration, and initial solution pH, was systematically investigated. The results showed that the degradation process of TC followed the second-order kinetic model and that the degradation efficiency increased along with increasing SOH-600 dosage, increasing initial H2O2 concentration, and decreasing initial solution pH under the experimental conditions. Moreover, SOH-600 exhibited an excellent recycling performance and a high catalytic efficiency (> 90%) after five cycles. UV vis, TOC, ESR, and HPLC-MS analyses were used to reveal that the (OH)-O-center dot formed in the SOH-600/H2O2 system was mainly responsible for the degradation of TC, and the degradation pathway of TC was proposed.
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