增强的固和Cd被动化由生物炭装载的固细菌在树脂层土壤中:化学吸收和微生物机制
Yuxiao Chang1, Lihong Lin2, Jianlin Shen3
1Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China.
Journal of hazardous materials
|November 21, 2024
概括
带有生物炭的细菌 (BAc) 增强植物生长,通过改善固定和固定Cd来减少土壤 (Cd). 这种生物炭材料有效地促进了植物健康,并修复了受污染的土壤.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 土壤 (Cd) 污染对植物生长和食品安全构成风险.
- 研究生物炭和微生物修改用于土壤整治和植物生长促进.
- 了解结合生物炭-微生物治疗的机制至关重要.
研究的目的:
- 开发和评估一种含有固定细菌 (Azotobacter chroococcum; BAc) 的生物炭载材料,用于固定和促进植物生长.
- 阐明BAc对土壤Cd和生菜生长的影响背后的化学和微生物机制.
- 评估BAc对树根球微生物群落结构和功能的影响.
主要方法:
- 开发带有生物炭的Ac材料.
- 将BAc应用于生菜根球和监测植物生长参数.
- 对土壤Cd生物利用率和植物Cd积累的分析.
- 使用光标记和结构方程建模 (SEM) 等技术,研究土壤的化学性质 (如pH) 和微生物群落组成.
主要成果:
- BAc通过稳定的复合物和激活的生物炭功能组增强了Cd吸附.
- 它成功地殖民了生菜根系球,改善了植物的含量和生物质.
- 通过改变土壤pH值和Cd分数,BAc显著降低了土壤Cd生物可用性和植物Cd积累.
- BAc优化了树根球的营养环境,增加了微生物多样性,并促进了有益的微生物种群.
结论:
- 含有生物炭的固细菌 (BAc) 有效地促进植物生长,增强了生菜中的利用率.
- BAc通过改变土壤化学和微生物群落结构,显著地固定土壤.
- 这种方法为同时进行土壤Cd整治和提高作物产量提供了一个有希望的策略.
更多相关视频
相关概念视频
01:30Environmental Applications of Microorganisms
2
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...
2
02:11The Roles of Bacteria and Fungi in Plant Nutrition
35.1K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.1K
00:46Bioremediation
18.2K
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.
18.2K
01:28Carbon-dioxide Fixation
1
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...
1
01:15Metabolism of Chemolithotrophs
2
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.
2
01:49The Nitrogen Cycle
51.6K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
51.6K