相关实验视频

Updated: Sep 9, 2025

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

Published on: November 28, 2014

在根球中由Fe改性生物炭驱动的ROS生成及其在微塑料转化中的作用

Zulqarnain Haider Khan¹, Han Yu², Hui Li³

¹State Key Laboratory of Regional and Urban Ecology, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China; Zhejiang Key Laboratory of Pollution Control for Port-Petrochemical Industry, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, PR China.

Journal of hazardous materials

|September 4, 2025

概括

用铁改性生物炭 (FeBC) 显著增加了土中的活性氧物种 (ROS),加速了微塑料的降解. FeBC 增强了土壤微生物活动,并改变了微生物群落,为农业土壤整治提供了新的见解.

科学领域:

环境科学
土壤化学
生物地质化学

背景情况:

反应性氧物种 (ROS) 对于土壤的生态化学过程至关重要.
生物炭 (BC) 和其修饰在根球ROS生成中的作用仍然在很大程度上未被探索.
微塑料 (MP),包括可生物降解 (PBS) 和常规 (聚乙烯) 类型,在农业土壤中构成环境挑战.

研究的目的:

研究BC和Fe修饰生物炭 (FeBC) 对土中ROS产生的影响.
评估FeBC在模拟洪水条件下对可生物降解和常规微塑料的降解的影响.
了解ROS动态,铁斑形成,微生物活动和MP降解之间的相互作用.

主要方法:

在400°C和600°C准备BC和FeBC.
用PBS和聚烯MP模拟淹没的水土壤条件的球专注实验.
量化ROS (O₂•-,H₂O₂,OH) 和分析铁斑,水溶性,溶解的有机碳和SUVA₂₅₄.
扫描电子显微镜 (SEM) 用于MP表面分析和微生物群落概况.

主要成果:

在米土壤中,FeBC,特别是在600°C下制备的FeBC,显著提高了ROS (O₂•-,H₂O₂,^•OH) 的产生,尤其是在PBS的存在下.
通过氧化分解,FeBC处理加速了MP的降解,增加了溶解有机碳的释放,并减少了SUVA.
微生物群体分析显示转向了Actinobacteria和Firmicutes,与ROS动态和降解途径相关.

结论:

FeBC 作为根球中 ROS 生成的新型催化剂,影响土壤的生物地化学过程.
在农业系统中,FeBC应用促进了微塑料的氧化降解.
这些发现将非生物ROS生成与生物反应联系在一起,为BC修改土壤的综合MP修复策略提供了洞察力.

关键词:

铁板微塑料反应性氧物种 (ROS)重氧化过程土壤修改

更多相关视频

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

Published on: December 24, 2014

Transformation of Organic Household Leftovers into a Peat Substitute

Transformation of Organic Household Leftovers into a Peat Substitute

Published on: July 9, 2019

相关概念视频

Bioremediation

Bioremediation

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.

Environmental Applications of Microorganisms

Environmental Applications of Microorganisms

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...

Microbial Nutrition

Microbial Nutrition

Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...