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O/CaO 体系在 HCO3-存在下对水体中天冬酰胺环素的降解：性能、机制、降解途径和毒性评估。

The Degradation of Aqueous Oxytetracycline by an O/CaO System in the Presence of HCO3-: Performance, Mechanism, Degradation Pathways, and Toxicity Evaluation.

机构信息

School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China.

College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.

出版信息

Molecules. 2024 Jan 31;29(3):659. doi: 10.3390/molecules29030659.

DOI:10.3390/molecules29030659
PMID:38338403
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10856086/
Abstract

This research constructed a novel O/CaO/HCO3- system to degrade antibiotic oxytetracycline (OTC) in water. The results indicated that CaO and HCO3- addition could promote OTC degradation in an O system. There is an optimal dosage of CaO (0.05 g/L) and HCO3- (2.25 mmol/L) that promotes OTC degradation. After 30 min of treatment, approximately 91.5% of the OTC molecules were eliminated in the O/CaO/HCO3- system. A higher O concentration, alkaline condition, and lower OTC concentration were conducive to OTC decomposition. Active substances including ·OH, O, ·O2-, and ·HCO3- play certain roles in OTC degradation. The production of ·OH followed the order: O/CaO/HCO3- > O/CaO > O. Compared to the sole O system, TOC and COD were easier to remove in the O/CaO/HCO3- system. Based on DFT and LC-MS, active species dominant in the degradation pathways of OTC were proposed. Then, an evaluation of the toxic changes in intermediates during OTC degradation was carried out. The feasibility of O/CaO/HCO3- for the treatment of other substances, such as bisphenol A, tetracycline, and actual wastewater, was investigated. Finally, the energy efficiency of the O/CaO/HCO3- system was calculated and compared with other mainstream processes of OTC degradation. The O/CaO/HCO3- system may be considered as an efficient and economical approach for antibiotic destruction.

摘要

本研究构建了一种新型的 O/CaO/HCO3- 体系，用于降解水中的抗生素土霉素（OTC）。结果表明，CaO 和 HCO3- 的添加可以促进 O 体系中土霉素的降解。存在促进 OTC 降解的最佳 CaO（0.05 g/L）和 HCO3-（2.25 mmol/L）用量。处理 30 min 后，约有 91.5%的 OTC 分子在 O/CaO/HCO3- 体系中被消除。较高的 O 浓度、碱性条件和较低的 OTC 浓度有利于 OTC 分解。·OH、O、·O2- 和·HCO3- 等活性物质在 OTC 降解中发挥一定作用。·OH 的产生顺序为：O/CaO/HCO3- > O/CaO > O。与单一 O 体系相比，TOC 和 COD 在 O/CaO/HCO3- 体系中更容易去除。基于 DFT 和 LC-MS，提出了 OTC 降解途径中优势活性物质。然后，对 OTC 降解过程中中间产物毒性变化进行了评价。考察了 O/CaO/HCO3- 处理其他物质（如双酚 A、四环素和实际废水）的可行性。最后，计算了 O/CaO/HCO3- 系统的能源效率，并与其他 OTC 降解主流工艺进行了比较。O/CaO/HCO3- 体系可能被认为是一种有效且经济的抗生素破坏方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/3c5594b36ec3/molecules-29-00659-g009a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/0858f47db98e/molecules-29-00659-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/e7d3f82d1e72/molecules-29-00659-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/363871248a96/molecules-29-00659-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/ccab0ec6f104/molecules-29-00659-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/3c5594b36ec3/molecules-29-00659-g009a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/0858f47db98e/molecules-29-00659-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/6c40aaf33eff/molecules-29-00659-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/570d3dc63348/molecules-29-00659-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/0a344573ad89/molecules-29-00659-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/4ae59eaa7c72/molecules-29-00659-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/e7d3f82d1e72/molecules-29-00659-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/363871248a96/molecules-29-00659-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/ccab0ec6f104/molecules-29-00659-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7921/10856086/3c5594b36ec3/molecules-29-00659-g009a.jpg

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