增强凝固以去除水中溶解的有机:一篇综述
Yasha Jathan1, Eric A Marchand1
1Department of Civil and Environmental Engineering University of Nevada, Reno, Reno, NV, 89557, USA.
Chemosphere
|September 30, 2024
概括
增强凝固有效地从废水中去除溶解有机 (DON),但需要对其机制和影响因素进行更多的研究,以优化水处理和更安全的水生产.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 分析化学 分析化学
背景情况:
- 污水处理厂 (WWTP) 有效地去除无机,但溶解有机 (DON) 仍然是废水中的重要组成部分.
- 在经过处理的废水和饮用水处理厂 (DWTP) 中的DON污水可能会导致肥胖,并形成化消毒副产品 (N-DBP).
- 关于使用增强凝血去除DON的研究有限,尽管它的潜力很大.
研究的目的:
- 审查当前关于增强凝固以去除溶解有机 (DON) 的知识.
- 确定有关DON特征,去除机制和增强凝血过程中的分子转变的知识差距.
- 突出未来研究领域,以优化DON清除过程.
主要方法:
- 文献综述侧重于加强凝血以去除DON.
- 分析DON特征,包括其复杂的分子组成.
- 讨论去除机制和影响增强凝血的因素.
主要成果:
- 增强凝血是去除DON的一种可行的方法,但它的有效性各不相同.
- DON是一种复杂的混合物,其化合物只有一小部分被确定.
- 关于DON特征和凝固剂特性对去除效率的影响存在知识差距.
结论:
- 进一步的研究至关重要,以了解DON去除增强凝血的潜在机制和影响因素.
- 研究凝固剂辅助剂,新型凝固剂和预处理选项可以提高DON去除效率.
- 解决知识差距将促进流程优化,以有效地去除DON和生产安全水.
更多相关视频
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
6.1K
08:49Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
Published on: May 15, 2017
10.5K
相关概念视频
01:06Coagulation
274
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...
274
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
02:24Comparative Excretory Systems
19.2K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
19.2K
01:09Colloidal precipitates
521
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...
521
00:56Extraction: Advanced Methods
431
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...
431
01:20Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K