相关实验视频

Updated: Jun 15, 2025

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

在中国东部的一个城市湿地,H₂S和SO₂的地表空气交换

Qian Yu¹, Wenjia Wang¹, Jiale Chang¹

¹State Key Laboratory of Pollution Control & Resource Reuse and School of Environment, Nanjing University, Nanjing, China.

The Science of the total environment

|August 23, 2024

概括

城市湿地显示了最小的硫化 (H2S) 排放量,并作为二氧化硫 (SO2) 的重要消化器,这表明H2S对空气质量的风险有限,但可能会在城市环境中去除SO2.

科学领域:

环境科学环境科学
大气化学大气化学
湿地生态系统湿地生态系统

背景情况:

湿地是生物硫气体 (H2S,SO2) 的关键来源和沉积点,影响空气质量和气候.
了解城市湿地扩张在大气硫预算中的作用至关重要.

研究的目的:

在中国的一个城市湿地,量化硫化 (H2S) 和二氧化硫 (SO2) 的地表空气交换流.
评估城市湿地对大气H2S和SO2预算的贡献.
与环境因素相关的SO2补偿点概念的研究.

主要方法:

使用动态流体室 (DFC) 方法测量H2S和SO2流量.
从2022年9月到2023年7月,在中国东部的一个城市湿地进行测量.
分析了气体交换的季节性变化和环境影响,并提出了SO2补偿点.

主要成果:

城市湿地每年净H2S流量为-0.04公斤S ha-1 yr-1,这与预期的高排放量相反,可能是由于土壤pH值高和低硫酸盐.
观察到的SO2净沉积流量为0.14kg S ha-1 yr-1,表明湿地充当大气SO2的沉降池.
二氧化碳补偿点因季节性变化 (0.862.37 ppb),受温度和湿度的影响,夏季和秋季价值较高.

结论:

城市湿地扩张几乎没有增加大气H2S的风险.
城市湿地可以作为大气SO2的重要吸收点,特别是在SO2度升高的时期.
二氧化补偿点是一个由环境条件影响的动态参数,突显了湿地在城市空气质量中的复杂作用.

关键词:

补偿点是一个补偿点.H(2) S 的排放量.自然的来源自然的来源.SO(2) 干沉积的沉积方式.地面-空气交换的交换.城市湿地是城市湿地.

更多相关视频

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

Published on: June 27, 2022

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production

Published on: March 22, 2024

相关概念视频

The Sulfur Cycle

The Sulfur Cycle

Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...

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.