通过同时存在的和二氧化来抑制绿结晶的协同作用
Jeffrey Paulo H Perez1, Dominique J Tobler2, Liane G Benning1,3
1GFZ German Research Center for Geosciences, Telegrafenberg, 14473 Potsdam, Germany. jpperez@gfz-potsdam.de.
Environmental science. Processes & impacts
|February 16, 2024
概括
同时存在的和二氧化显著抑制了绿色生硫酸盐的形成和铁前体的稳定性. 这种协同效应影响了富含铁的地下水和沉积物中的的流动性.
科学领域:
- 环境地质化学环境地质化学
- 矿物学是什么?矿物学是什么?
- 污染物水文地质学
背景情况:
- 已知 (As) 和 (Si) 抑制铁矿物质结晶.
- 同时存在的As和Si对混合价值铁矿物质如绿色生 (GR) 的影响尚不清楚.
- 绿在无毒环境中控制微量元素和污染物流动性方面发挥着至关重要的作用.
研究的目的:
- 研究和二氧化同时存在对绿色生硫酸盐 (GRSO) 结晶和稳定性的影响.
- 在富含Fe2+的条件下确定含有As和/或Si的化 (FHY) 的转化动力学.
- 为了确定不同As和Si组合对GR形成和稳定性的相对抑制作用.
主要方法:
- 在pH 8下监测Fe2+诱导的As和/或Si含化 (FHY) 在720小时内发生的转化.
- 通过对特定初始度的控制实验室实验,使用 (III), (V) 和.
- 将单一物种的转化速率和矿产产品与同时存在的As和Si系统进行比较.
主要成果:
- 同时存在的As (III) + Si和As (V) + Si显著减缓了FHY产生的GRSO形成,比单一物种减缓多达四倍.
- 结合的As (III) +Si和As (V) +Si抑制了GRSO转化为磁铁,与单独的Si或As (V) 不同.
- 建立了一个抑制作用等级:As(III) + Si > As(V) + Si > As(III) > Si > As(V).
结论:
- 同时存在的二氧化对含的绿色生硫酸盐的结晶和固态稳定具有协同的抑制作用.
- 绿色生对于控制的命运和移动性在铁质,Si丰富的地下水和沉积物中很重要,特别是在南亚和东南亚.
- 了解这些相互作用对于预测污染环境中的行为至关重要.
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