聚烯硫化物作为循环中被忽视的中心中间体
Mathieu Martinez1, Markus Lenz2
1Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Hofackerstrasse 30, 4132, Muttenz, Switzerland; CEA, DES, IRESNE, DEC, LARC, Cadarache, 13115, St-Paul-Lez-Durance, France.
Chemosphere
|December 3, 2025
概括
研究人员发现了新型溶解的物种,称为聚烯硫化物. 这些由元素与硫化物反应而形成,影响.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 生物地质化学生物地质化学
背景情况:
- (Se) 是一种微量元素,具有狭窄的最佳营养范围,其环境行为是由物种决定的.
- 传统上,的环境循环被视为涉及特定Se物种的氧化还原过程,元素Se (Se) 作为一个中心的,受欢迎的物种.
- 的环境命运和流动性受到其化学形式和与其他元素的相互作用的重大影响.
研究的目的:
- 识别和描述由元素与硫化物反应形成的新型溶解物种.
- 为了研究这些新发现的硫物种的形成条件和动力学.
- 重新评估在硫化环境中的环境循环,并挑战现有的模型.
主要方法:
- 使用衍生与超高性能液体染色学喷射电离四极飞行时间质谱学 (UHPLC-ESI-QTOF-MS) 结合.
- 在不同的pH条件下分析了元素与硫化物的反应产物.
- 已识别和量化的多硫化物,化物,多化物和新型多烯硫化物.
主要成果:
- 确定了一组新型的溶解聚烯硫化物种 (一般配方SexSy2-),包括SeS2-,SeS22-,Se2S2-,和SeS32-.
- 证明聚烯硫化物在性pH下由元素与硫化物的反应自发而快速 (<24小时) 形成,而在环中性pH下更慢.
- 检测到的多硫化物 (Sx2-),化物 (Se2-) 和多化物 (Sex2-) 以及新型的多化硫化物.
结论:
- 在硫化环境中聚烯硫化物的自发形成需要对的环境命运和循环进行修订.
- 挑战了传统的"中心"观点,强调了和硫循环通过聚烯硫化物形成的相互联系.
- 提出了一个"性"的观点,强调的环境行为受到硫化物存在的强烈影响,质疑元素作为终端物种的作用.
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