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相关概念视频

Bioremediation00:46

Bioremediation

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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.
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Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
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相关实验视频

Updated: Jan 13, 2026

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
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来自生物固体加工厂的核化模式颗粒物排放

Lintong Cai1, Sanghee Han1, Minghao Han1

  • 1Department of Chemical and Environmental Engineering, Center for Environmental Research and Technology (CE-CERT), University of California─Riverside, 1084 Columbia Avenue, Riverside, California 92507, United States.

Environmental science & technology
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概括
此摘要是机器生成的。

生物固体加工设施释放大量纳米粒子,造成潜在的健康风险. 这些微小的颗粒,虽然质量小,但具有高度反应性,可以深入呼吸系统.

关键词:
堆肥设施的堆肥设施.能量分散式X射线光谱学 (EDX)纳米颗粒是一种纳米粒子.形成新的粒子形成.核化模式粒子的核化方式传输电子显微镜 (TEM) 的使用废水处理厂的废水处理厂.

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科学领域:

  • 环境科学 环境科学
  • 大气化学 大气化学
  • 纳米技术 纳米技术

背景情况:

  • 人们越来越担心纳米颗粒物排放,尽管颗粒物质量减少了.
  • 超细颗粒 (<10 nm) 的表面与体积比较高,增加了反应性和呼吸道透.

研究的目的:

  • 为了调查生物固体加工设施的纳米粒子排放.
  • 描述发射的纳米粒子的大小,度和组成.

主要方法:

  • 从生物固体设施向下风向下的粒子数度 (PNs) 的现场测量.
  • 与二氧化碳 (CO2) 水平作为呼吸追踪器的相关性分析.
  • 使用传输电子显微镜和能量分散式X射线光谱学对粒子组成和形态的表征.

主要成果:

  • 在风向下观察到5-20nm粒子的升高PN值 (超过20万厘米-3).
  • PN与高CO2相关,表明与细菌呼吸有联系.
  • 颗粒主要是碳质的,含有硫,和,具有聚合形态.

结论:

  • 生物固体加工设施是纳米粒子排放的来源.
  • 粒子形成可能涉及由挥发性有机化合物触发的气相核化.
  • 需要进一步的研究来评估公共卫生和空气质量影响.