低氧度对沙子过系统中微量有机化学品的生物转化的影响
Josefine Filter1, Marianne G V Kopp1, Aki S Ruhl2
1Technical University of Berlin, Chair of Water Quality Control, KF4, Str. des 17. Juni 135, 10623, Berlin, Germany.
Chemosphere
|June 4, 2023
概括
在管理的含水层充电系统中,微量有机化学物质 (TOrC) 的去除通过适应的沙过器中的生物活性得到改善,即使在低氧条件下也是如此. 一些TOrCs快速转化,而另一些则保持耐药性.
科学领域:
- 环境科学 环境科学
- 水处理 处理水的方法
- 微生物学 微生物学
背景情况:
- 管理的含水层补充 (MAR) 系统面临的挑战是由于保留不良,在去除微量有机化学物质 (TOrCs) 方面面临挑战.
- 预测砂系统中的TOrC去除需要对生物转化过程进行进一步的研究.
研究的目的:
- 在不同氧度和影响性TOrC水平下,研究沙过系统中的TOrC转化.
- 评估沙子生物活性和适应对TOrC去除效率的影响.
主要方法:
- 使用两种不同的过砂进行实验室柱体实验.
- 使用光追踪剂Resazurin对生物活性进行量化.
- 应用修改后的Gompertz模型来确定TOrC去除的消散时间 (DT50).
主要成果:
- 即使在低氧 (0.5 mg/L) 条件下,也观察到阿塞苏尔法姆,形式胺抗, gabapentin,硫甲醇和瓦尔萨坦酸的快速DT50 (<10小时).
- TOrC转化,特别是瓦尔萨坦酸,对技术砂中的低氧敏感,具有较低的生物活性.
- 来自土壤含水层处理 (SAT) 的适应性良好的沙子显示出强大的TOrC去除,不受亚箱状况的影响.
- 影响性TOrC度增加 (10μg/L) 促进了对硫和硫甲的适应.
- 在实验条件下,佐特醇,卡巴马泽平,迪克洛菲纳克和文拉法辛都表现出反性.
结论:
- 沙中的生物活性和适应性对于MAR系统中有效的TOrC去除至关重要.
- 土壤含水层处理 (SAT) 砂表现出对低氧气的弹性,增强了TOrC的去除.
- 了解TOrC转换动态是优化饮用水回收过程的关键.
更多相关视频
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.7K
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
9.8K
相关概念视频
Bioremediation
19.2K
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.
19.2K
Oxygen Requirements and Growth Patterns
164
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the terminal...
164
Environmental Applications of Microorganisms
78
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...
78
Metabolism of Chemolithotrophs
55
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.
55
