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量化来自气链的硫化合物排放量

Nohhyeon Kwak¹, Shahar Tsameret¹, Brittany Mc Intyre²

¹Mechanical and Aerospace Engineering, University of Miami, 1251 Memorial Dr., Coral Gables, FL, 33146, USA.

Marine pollution bulletin

|January 16, 2026

概括

大规模的Sargassum浅物释放出有害的硫气体. 这项研究量化了排放因子,发现夏季的海水条件产生了最高的排放量,主要是硫化 (H2S).

科学领域:

环境化学环境化学
大气科学大气科学
海洋生物学海洋生物学

背景情况:

大规模的海性萨尔加索条释放出大量的硫化合物,包括硫化 (H2S),二氧化硫 (SO2) 和二甲基硫化 (DMS).
这些排放对人类健康和当地空气质量构成风险,但缺乏用于建模和减缓的排放因子.
了解季节性变化和对石灰岩分解的环境影响,对于预测和管理这些影响至关重要.

研究的目的:

在受控的实验室条件下,量化从分解石灰中产生的硫排放因子.
调查季节 (夏季与冬季) 以及海水存在对硫排放的影响.
确定释放的占主导地位的硫种及其相对贡献.

主要方法:

在夏季和冬季,从佛罗里达州的基比斯凯恩收集了和海水样本.
在密封的室内监测了14天的分解,每天使用UV光分析仪测量总硫,H2S和SO2.
用气相色谱-质谱学 (GC-MS) 分析了二甲基硫化物 (DMS).

主要成果:

硫排放在分解的前两天达到峰值,夏季样本显示的排放率明显高 (平均总硫峰值:3440μg/kg/天) 比冬季样本 (71.2μg/kg/天).
海水的存在增加了两个季节的硫排放,在夏季海水样本中观察到的最大的总硫排放因子 (约. 5190 微克/公斤-天).
硫化 (H2S) 是占主导地位的硫种 (平均29%),而DMS被确定为主要的挥发性有机化合物.

结论:

季节性因素和环境条件,特别是温度和海水的存在,是气硫排放的关键决定因素.
量化的排放因子强调了需要快速清除水和的,特别是在夏季,以减轻H2S的释放和保护公共健康.
体浅物是气溶前体 (DMS,SO2) 的重要沿海来源,影响大气化学和空气质量.

关键词:

室内实验室中的实验室实验室排放因子排放因子石灰泥的分解分解南佛罗里达州的南方佛罗里达州.

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