La replaced Bi3+ in BiO2-x for oxygen vacancies generation: degradation of antibiotics and biological toxicity elimination

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china Pub Date : 2025-04-23 DOI:10.1016/j.jes.2025.03.033

Jiangtao Niu , Jin Zhang , Xiaoxuan Song , Naif Abdullah Al-Dhabi , Wanhong He , Guihua Huang , Dujie Feng , Wanngwang Tang , Mingming Dang , Yi Zhou

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引用次数: 0

Abstract

La-BiO_2-x composite photocatalyst was successfully synthesized through a single-step hydrothermal strategy. The introduction of La³⁺ into the BiO_2-x lattice replaces the Bi³⁺ in the BiO_2-x lattice, resulting in a new defect level and oxygen vacancies (V_o) generation. The ·O₂⁻ generated in the surface of V_o, which was converted into singlet oxygen (¹O₂) with the transformation of Bi⁵⁺ to Bi³⁺. Upon visible (near-infrared) light irradiation, the removal rates of tetracycline (TC), oxytetracycline (OTC), and levofloxacin (LEV) by trace 5 % La-BiO_2-x (0.1 g/L) reached 84.18 % (55.56 %), 78.85 % and 70.12 %, respectively. The Toxicity Estimation Software Tool (T.E.S.T) based on Quantitative Structure-Activity Relationship (QSAR) models illustrated that the biological toxicity of TC intermediates can be eliminated by 5 % La-BiO_2-x. The green bean germination rates in 5 % La-BiO_2-x treated TC solution was close to that in the tap water (100.0 %). The inorganic anion and humic acid (HA) exhibited almost no influence on the degradation of TC in lake water and river water. This study enhances the comprehension of biological toxicity elimination in antibiotics degradation process, providing the possibilities for actual applications of La-BiO_2-x.

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La取代Bi3+在BiO2-x中的氧空位生成：抗生素降解和生物毒性消除

采用单步水热策略成功合成了La-BiO2-x复合光催化剂。在BiO2-x晶格中引入La3+取代了Bi3+，产生了新的缺陷能级和氧空位（Vo）。在Vo表面生成的·O2−随着Bi5+向Bi3+的转化转化为单线态氧（1O2）。在可见光（近红外光）照射下，微量5% La-BiO2-x （0.1 g/L）对四环素（TC）、土霉素（OTC）和左氧氟沙星（LEV）的去除率分别达到84.18%（55.56%）、78.85%和70.12%。基于定量构效关系（QSAR）模型的毒性评估软件工具（T.E.S.T）表明，5%的La-BiO2-x可以消除TC中间体的生物毒性。在5% La-BiO2-x处理过的TC溶液中，绿豆的发芽率与自来水中的发芽率（100.0%）接近。无机阴离子和腐植酸（HA）对湖泊水体和河流水体中TC的降解几乎没有影响。本研究增强了对抗生素降解过程中生物毒性消除的理解，为La-BiO2-x的实际应用提供了可能。

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来源期刊

Journal of Environmental Sciences-china 环境科学-环境科学

CiteScore

13.70

自引率

0.00%

发文量

6354

审稿时长

2.6 months

期刊介绍： The Journal of Environmental Sciences is an international journal started in 1989. The journal is devoted to publish original, peer-reviewed research papers on main aspects of environmental sciences, such as environmental chemistry, environmental biology, ecology, geosciences and environmental physics. Appropriate subjects include basic and applied research on atmospheric, terrestrial and aquatic environments, pollution control and abatement technology, conservation of natural resources, environmental health and toxicology. Announcements of international environmental science meetings and other recent information are also included.