典型的PPCP在无氧消化过程中和在土壤中的降解
Min Guo1, Linyue Xu1, Liguo Guo1
1Ministry of Ecology and Environment, Nanjing Institute of Environmental Science, Nanjing 210042, China.
Toxics
|September 27, 2025
概括
无氧消化 (AD) 后陆地应用的连续处理显示了药品和个人护理产品 (PPCP) 的可变降解. 米布罗西尔降解得很差,而硫甲氧化,美格斯特酸和孕激素的持续性较低.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
- 生物地质化学生物地质化学
背景情况:
- 药品和个人护理产品 (PPCPs) 在无氧消化 (AD) 和随后的土壤暴露过程中经历退化.
- 连续的AD和土地应用对PPCP命运的综合影响尚未得到充分理解.
研究的目的:
- 评估九种PPCP在中性亚洲菌和随后的土壤化过程中的降解特征.
- 评估土壤物理化学特性对PPCP降解率的影响.
主要方法:
- 在介质性AD (38°C) 期间,在30天内监测9个PPCP的度变化.
- 在黑暗条件下 (25°C,75%湿度) 在三种土壤类型中化PPCP30天.
- 将降解数据与第一阶动力学方程相匹配,并计算半衰期.
主要成果:
- 阿迪有效地清除了硫甲氧化,西普洛素和氧环素 (>80%).
- 卡巴马泽平,孕激素,三素,纳普罗和美格斯特醇酸的去除程度中等 (50-80%),而格米非布罗西尔的降解程度最小 (<50%).
- 降解遵循一级动力学,半衰期在PPCP和土壤类型之间显著不同;土壤特性影响了降解速度.
结论:
- 由于降解不良,米布罗齐尔具有很高的持续性风险.
- 卡巴马泽平,西普罗夫洛克萨,氧得四环素,纳普罗森和三桑由于中等持续性,需要进一步评估风险.
- 在研究条件下,sulfamethoxydiazine,megestrol乙和孕激素的持续性风险较低.
更多相关视频
13:38Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
Published on: May 10, 2013
31.3K
08:43Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer
Published on: October 24, 2025
326
相关概念视频
Amino Acid Catabolism
1.0K
Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
1.0K
Environmental Applications of Microorganisms
969
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
969
Metabolism of Chemolithotrophs
785
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
785
Bioremediation
22.0K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.0K
Overview of Nitrogen Metabolism
11.0K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
11.0K
Carbon-dioxide Fixation
647
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
647
