| 范宇星,陈芬,周世帆,黄亮亮,邹小明.Cu2+对UV-nTiO2光催化降解抗生素的影响研究[J].井冈山大学自然版,2021,42(3):45-51 |
| Cu2+对UV-nTiO2光催化降解抗生素的影响研究 |
| EFFECTS OF Cu2+ ON ANTIBIOTIC DEGRADATION IN UV-nTiO2 PHOTOCATALYSIS SYSTEM |
| 投稿时间：2020-11-16 修订日期：2021-01-12 |
| DOI：10.3669/j.issn.1674-8085.2021.03.009 |
| 中文关键词: 光催化 抗生素 金属离子 降解速率 |
| 英文关键词: photocatalysis antibiotic metal ions degradation rate |
| 基金项目:国家自然科学基金项目（41461094，31760165）；江西省杰出青年人才资助计划项目（20192BCBL23014）；江西省自然科学基金项目（20181BAB203023）；江西省青年井冈学者（QNJG2019072） |
| 作者 | 单位 | | 范宇星 | 桂林理工大学环境科学与工程学院, 广西, 桂林 541004 | | 陈芬 | 桂林理工大学环境科学与工程学院, 广西, 桂林 541004 | | 周世帆 | 井冈山大学生命科学学院, 江西, 吉安 343009 | | 黄亮亮 | 桂林理工大学环境科学与工程学院, 广西, 桂林 541004 | | 邹小明 | 井冈山大学生命科学学院, 江西, 吉安 343009 |
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| 中文摘要: |
| Cu2+是环境中常见二价金属离子，但其对光催化降解抗生素废水的影响有待探明。为此，构建UV-nTiO2体系并探究Cu2+共存下三类抗生素（磺胺类抗生素、氯霉素类抗生素及四环素类抗生素）的光催化降解特性。结果表明，Cu2+可显著影响抗生素光催化降解且呈"低浓度促进，高浓度抑制"效应。当Cu2+浓度介于0.001~0.03 mol/L时，抗生素降解半衰期（T0.5）可降低15%~90%；当浓度介于0.01~0.1 mol/L时，T0.5可增大1.5~4倍。结果也表明，Cu2+浓度和T0.5之间的关系可通过正弦函数进行表征（R2>0.905），且Cu2+对抗生素光催化降解效率的影响和抗生素的结构特征显著相关（P<0.05）。 |
| 英文摘要: |
| Cu2+ is a common divalent metal ion in the environment, but the effects of Cu2+ on antibiotic degradation in photocatalysis system remain unclear. Therefore, the photocatalytic degradation characteristics of three kinds of antibiotics (sulfonamides, chloramphenicols and tetracyclines) after the addition of 0~0.1 mol/L Cu2+ were investigated in UV-nTiO2 photocatalytic system. The results showed that the degradation of antibiotics can be markedly affected by the addition of Cu2+ and the phenomenon can be described as " low concentration promotion, high concentration inhibition ". In detail, when the Cu2+ concentration ranged from 0.001 to 0.03 mol/L, the half-life (T0.5) of antibiotic degradation can be reduced to 15~90%; when the concentration of Cu2+ was between 0.01~0.1 mol/L, the degradation half-life (T0.5) increased from 1.5 to 4 times as the control. Furthermore, the function of sine can describe the effects of Cu2+ on the degradation of antibiotics, and the correlation coefficient values were above 0.905. Moreover, the different effects of metal ions on the photo-degradation of antibiotics can be partially explained by the structural features of antibiotics (P < 0.05). |
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