从水溶液中通过使用生物启发的同酸盐进行相分离来回收
Xiaocui Fan1, Bin Liu2, Jie Xu3
1College of Engineering, Shandong Xiehe University, Jinan 250109, China; College of Resources and Environment, Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing 400716, China.
Journal of environmental sciences (China)
|July 2, 2025
概括
从废水中回收 (P) 对可持续性至关重要. 生物启发的聚乙胺) - - 聚烯胺-联合烯酸) (PEI-PAMcoAA) 协同化物有效地去除P,有可能重复使用肥料.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 可持续工程 可持续工程
背景情况:
- (P) 对于农业是必不可少的,但是一种水污染物,导致过度缩.
- 可持续的P管理需要有效的废水回收方法.
- 生物启发的协生物为去除提供了一种新的方法.
研究的目的:
- 通过使用聚乙烯胺) - - 聚胺 - - 合酸 (PEI-PAMcoAA) 协同化剂,研究从水溶液中去除 (P).
- 通过检查关键参数,如协化合物组成,pH值,初始P度和添加来优化P去除效率.
- 评估回收P作为肥料的再利用潜力.
主要方法:
- 合成的生物灵感PEI-PAMcoAA协剂用于P吸附.
- 系统地改变PEI:PAMcoAA比率,溶液pH,初始P度和度.
- 使用吸附性研究量化P去除效率,并分析同胞体内的P分化.
主要成果:
- 优化的PEI:PAMcoAA比率显著提高了P去除率,从47.21%提高到95.44%.
- 在没有的中性pH下,PEI-PAMcoAA协物通过静电吸附实现了77.96%的P去除效率.
- 在性条件下添加,通过促进降水和提供结合点,提高了P去除到82.42%.
结论:
- 特别是的PEI-PAMcoAA协体,对于从废水中去除P的效率很高,特别是在低度下.
- 回收的P可以被潜在地重新用作无毒的肥料,为循环经济做出贡献.
- 这种生物启发的协同生态方法为可持续的P管理提供了一个简单,有效和环保的解决方案.
相关概念视频
The Phosphorus Cycle
38.9K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
38.9K
Factors Affecting Solubility
34.0K
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:
34.0K
Coagulation
384
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...
384
Precipitation and Co-precipitation
2.1K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
2.1K
Colloidal precipitates
778
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
778
Extraction: Advanced Methods
547
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
547


