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研究H2S如何改变Hg0与腐蚀钢表面之间的相互作用,以指导未来的退役项目
Lhiam Paton1, Nick Marczinczik1, Thomas Lindsay1
1Trace Element Speciation Laboratory (TESLA), Institute of Chemistry, University of Graz, Graz 8010, Austria.
Journal of hazardous materials
|October 4, 2024
概括
海上管道在退役后可能会向海洋生态系统释放大量 (Hg). 钢面上的分类是复杂的,需要考虑除了元素和金属之外的各种形式,以便安全退役.
科学领域:
- 环境科学 环境科学
- 海洋化学 海洋化学
- 材料科学 材料科学 材料科学
背景情况:
- 海上石油和天然气基础设施的退役带来了潜在的 (Hg) 释放风险.
- 关于海积累和海底基础设施物种化的知识有限.
- 释放可以通过生物放大对海洋生态系统和人类健康产生不利影响.
研究的目的:
- 为了研究暴露在海上条件下的钢表面上的分类.
- 了解退役的海底管道释放的可能性.
- 为未来的含基础设施退役战略提供信息.
主要方法:
- 在钢样品上对化合物的分离分析.
- 钢铁暴露于元素 (Hg0) 和硫化 (H2S).
- 先进的分析技术包括X射线光显微镜 (XFM),X射线吸收近边缘结构 (XANES) 和激光剥离感应合等离子体飞行时间质谱 (LA-ICP-TOFMS).
主要成果:
- (Hg0) 与腐蚀的钢表面发生反应,形成多种化合物.
- 超过50%的化合物在海水中溶解,表明可能释放.
- 一种铜合金 (Cu-Hg) 被确定为一种占主导地位的物种.
- 当H2S存在时,观察到纳米粒子.
- 不管H2S的同时暴露,海水溶解和合物结合的都存在.
结论:
- 管道表面的物种化是复杂的,涉及各种形式.
- 退役战略必须考虑各种物种,而不仅仅是Hg0和β-HgS (金属).
- 如果不考虑所有形式,可能会导致严重的环境污染和海洋食物网中的生物放大.
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