自制100%耐水金属硫化物通过现场酸蚀刻有效捕获元素 (Hg)
Jiaoqin Zheng1, Zequn Yang1, Hongxiao Zu1
1School of Energy Science and Engineering, Central South University, Changsha 410083, China.
Langmuir : the ACS journal of surfaces and colloids
|November 28, 2023
概括
金属硫化物 (MSs) 对于元素 (Hg) 的去除,表现出增强的抗水性. 一种现场酸蚀刻方法可以自我调节MSs.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 金属硫化物 (MSs) 是有效的吸附剂,可以去除元素 (Hg) 和其它性污染物.
- 对于MSs应用的一个主要限制是它们对水 (H2O) 的敏感性,这阻碍了它们在潮湿环境中的性能.
- 在没有复杂的制备的情况下开发耐水吸附剂对于实际的环境修复至关重要.
研究的目的:
- 开发一种方法来自我调节金属硫化物 (MSs) 的耐水性.
- 为了增强MSs在水存在时对元素 (Hg) 的吸附选择性.
- 为了能够有效地从工业烟气中去除Hg.
主要方法:
- 使用现场酸蚀刻方法来修改MSs的表面.
- 该方法设计了MSs和Hg0/H2O.之间的界面相互作用.
- 表面的表征集中在缺乏协调的硫和多硫链 (Sn2-).
主要成果:
- 酸蚀刻方法引入了丰富的低协调硫,显著改善了MSs的耐水性.
- 聚硫链在表面形成,稳定Hg0,并由于有利的电子配置排斥H2O.
- 修改后的MSs表现出高的疏水性,100%的耐水性高达20%H2O,并增加了Hg0的选择性.
结论:
- 这项研究提出了一种可扩展的,简单的方法来创建高度耐水的MSs用于Hg0补救.
- 自主监管方法克服了水对成员国表现的不利影响.
- 开发的MSs具有成本效益,适合未来在工业烟气处理中的应用.
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