相关实验视频
Updated: Sep 20, 2025

04:40
Electrostatic Method to Remove Particulate Organic Matter from Soil
Published on: February 10, 2021
4.9K
在脉冲电动学下恢复被无机元素污染的性土壤
Abdul Ahad Hussain1, Muhammad Moeez2, Aasma Akram2
1Department of Physics, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan; Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, PR China.
Environmental research
|May 28, 2025
概括
脉冲电场改善了电动力学,可以从性土壤中去除重金属. 这种方法减少了能源的使用,并提高了污染物提取与连续领域相比,提供了一个更可持续的土壤整治解决方案.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 电化学 电化学 电化学
背景情况:
- 电动力学 (EK) 是一种有前途的技术,用于从性土壤中去除无机毒素.
- 连续电场面临着由于pH前端传播,金属氧化物沉和聚焦现象的限制,这降低了污染物去除效率并增加了成本.
- 这些局限性需要创新的方法来提高EK的有效性和成本效益在土壤整治.
研究的目的:
- 调查脉冲电场在克服连续电场在土壤修复方面的局限性方面的有效性.
- 评估脉冲场和乙烯基二胺四酸 (EDTA) 对 (Cr) 在性土壤中去除和转化的联合作用.
- 为了比较脉冲电场与连续电场的性能,能源消耗和对土壤性能的影响.
主要方法:
- 应用脉冲电场 (30分钟在1Vcm-1的开启/关闭周期) 来减缓pH前端传播并减轻聚焦现象.
- 在阳极引入EDTA以增强酸化并促进Cr的减少.
- 在脉冲和连续场条件下监测离子物种的去除,Cr的提取和减少,pH的变化,电场强度和能量消耗.
主要成果:
- 脉冲场通过减少聚焦定位和降低能源消耗,显著增强了离子物种的去除.
- 此外,EDTA显著改善了总Cr提取 (74.4%) 和Cr6+减少 (89%),同时诱导了用于增强阴离子传输的电化.
- 连续场加剧了聚焦区,抑制了离子去除,导致能源消耗比脉冲策略增加了12.24%.
结论:
- 脉冲电场为电动动土壤修复的连续场提供了可行和节能的替代方案.
- 脉冲场和EDTA的组合优化了重金属的提取和转化,特别是在性土壤中的.
- 这种方法提供了一种可控,具有成本效益和可持续的重金属和盐污染土壤修复策略.
相关概念视频
Coagulation
385
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...
385
Controlled-Potential Coulometry: Electrolytic Methods
291
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
291
Bioremediation
20.3K
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.
20.3K
Electrogravimetric Analysis: Overview
343
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
343
ATP Driven Pumps I: An Overview
8.6K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
8.6K
Electrodeposition
733
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
733

