可扩展和可持续的过程,通过氨循环方法从石中采用尖球形Mg(OH) 2吸附剂去除染料
Xiumei Duan1, Chao Wang2, Yue Zhang3
1Liaoning Provincial Engineering Research Center for High-Value Utilization of Magnesite, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Yingkou Institute of Technology, Yingkou, China.
PloS one
|September 16, 2025
概括
这项研究引入了一种环保的氨循环方法,用于从矿中合成尖球形氧化物 (SSMH). 这种新的工艺产生了高纯度的SSMH,它是一种有效的吸附剂,用于像反应红X-3B染料这样的污染物.
科学领域:
- 材料科学与工程 材料科学与工程
- 环境化学环境化学
- 绿色化学 绿色化学
背景情况:
- 传统的氧化合成方法往往会产生大量的污染.
- 越来越需要可持续和对环境无害的化学工艺.
- 石是一种丰富的天然矿物资源,具有增值应用的潜力.
研究的目的:
- 开发一种创新且环保的合成工艺,用于使用石的尖型球形氧化物 (SSMH).
- 为了优化离子提取和SSMH沉的条件.
- 为了评估合成的SSMH对反应性红色X-3B (RRX) 染料的吸附性能.
主要方法:
- 采用了一种新的氨循环方法,涉及石的化,与硫酸的反应,以及与氨水的沉.
- 确定了离子提取 (2.4mol/L (NH4) 2SO4,4g化石,1.5小时) 和沉 (0.7-1.3mol/L Mg2+,9 NH3H2O/Mg2+ 摩尔比率,60°C,1小时) 的最佳条件.
- 扫描电子显微镜 (SEM) 用于描述合成的SSMH的形态.
主要成果:
- 优化的工艺实现了93.4%的Mg2+提取率和85%的Mg2+沉率,在五个氨循环后稳定.
- SEM证实了2微米颗粒大小的均尖球形氧化物 (SSMH) 的形成.
- 在RRX染料中,SSMH的最大吸附容量 (Qm) 为150.4944 mg/g,按照Langmuir和伪二阶模型,表明化学吸附.
结论:
- 氨循环法为SSMH从石合成提供了一个可持续且无污染的途径.
- 合成的SSMH显示了RRX染料的优良吸附能力,由化学吸附驱动.
- SSMH显示出在从水溶液中去除各种污染物的更广泛环境应用的潜力.
相关概念视频
00:52Washing, Drying, and Ignition of Precipitates
5.7K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
5.7K
03:46Qualitative Analysis
23.6K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
23.6K