调查结构上有缺陷的UiO-66对于从尾液废水中去除Sb (V) 的潜力
Mingming Peng1, Deng You1, Zhennan Jin1
1Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China.
Environmental research
|August 1, 2023
概括
有缺陷的UiO-66晶体材料有效地从采矿泄漏物中去除 (Sb(V)). 即使在高度酸性条件下,UiO-66-HCl也表现出色,这表明了现实应用的巨大潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 矿山尾矿中的反污染给环境带来了重大关注.
- 有效的整治策略对于管理危险的矿业废物至关重要.
研究的目的:
- 为了合成有缺陷的UiO-66晶体材料去除 (Sb(V)).
- 研究调制器对材料缺陷和吸附性能的影响.
- 评估这些材料在处理实际尾尘沙出物中的效率.
主要方法:
- 使用三酸和盐酸作为调节剂,合理构建有缺陷的UiO-66-X材料.
- 用X射线衍射 (XRD) 和热重力测量 (TG) 分析进行材料表征.
- 在各种pH条件下进行吸附实验,以评估Sb(V) 除去效率.
- 动力建模和固定床吸附试验,以评估性能和实际适用性.
主要成果:
- 有缺陷的UiO-66材料已成功合成,UiO-66-TFA呈现集群和连接体缺陷.
- 在pH 7.5.5下,UiO-66和UiO-66-HCl实现了100%的Sb (V) 去除.
- 在所有合成材料的pH值为2.5时,观察到高的SbV去除率 (高达90%).
- UiO-66-HCl在pH0.5下也表现出强大的Sb(V) 清除能力.
- 吸附遵循伪二阶动力学,表明化学吸附是关键机制.
结论:
- 有缺陷的UiO-66材料,特别是UiO-66-HCl,对于从采矿漏物中去除Sb(V) 是非常有效的.
- 这些材料在广泛的pH值范围内显示出出色的稳定性和性能,包括强酸性条件.
- 这些发现凸显了工程UiO-66材料在实际环境修复应用中的巨大潜力.
相关概念视频
01:06Coagulation
331
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
331
04:01Factors Affecting Solubility
33.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.5K