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The synergistic effect of PMS activation by LaCoO3 /g-C3 N4 for degradation of tetracycline hydrochloride: performance, mechanism and phytotoxicity evaluation.
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- Author(s): Yuan, Xiaoying; Leng, Yue; Fang, Changlong; Gao, Kangqi; Liu, Chenyu; Song, Jianjun; Guo, Yingshu
- Source:
New Journal of Chemistry; 7/7/2022, Vol. 46 Issue 25, p12217-12228, 12p- Subject Terms:
- Source:
- Additional Information
- Abstract: Tetracycline hydrochloride (TC) is a typical refractory organic pollutant, and is frequently detected in different water environments, which will increase microbial drug resistance, destroy ecosystems and threaten human health. It is urgent to develop a simple and effective catalyst for TC removal. In this paper, a facile two-step calcination method was used to prepare a LaCoO
3 /g-C3 N4 composite catalyst with high activity and high stability for PMS activation to degrade TC. Various characterization results confirmed that the LaCoO3 /g-C3 N4 composite catalyst possessed smaller particle size, higher stability and faster electronic transmission ability. Benefiting from the synergistic effect between LaCoO3 and g-C3 N4 , the LaCoO3 /g-C3 N4 catalyst showed high activity for PMS activation to degrade different antibiotics. Furthermore, the results of the quenching experiments and the electron paramagnetic resonance (EPR) tests showed that the generated SO4 ˙− and 1O2 radicals during the PMS activation process played a key role in pollutant degradation. The effect of different reaction conditions (including pH, temperature, PMS concentration, catalyst dosage and different anions) on the performance of the catalyst was also investigated. The catalyst cycle evaluation experiments showed that the LaCoO3 /g-C3 N4 composite catalyst has high stability and reusability. The phytotoxicity evaluation based on seed germination experiments indicated that the LaCoO3 /g-C3 N4 composite catalyst system can effectively reduce the toxicity of antibiotics. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of New Journal of Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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