通过电化脱水来对湖泊恢复进行脱水和提升湖泊沉积物的价值
Huilin Li1, Lisbeth M Ottosen2
1Department of Environmental and Resource Engineering, Technical University of Denmark, Lyngby, Denmark. huilli@dtu.dk.
概括
电透式脱水有效地从疏的湖泊沉积物中去除水,将质量减少7-20%. 这种方法为沉积物处理和资源回收提供了低能耗的解决方案,其最佳参数平衡了取水和能源使用.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 沉积物管理 沉积物管理
背景情况:
- 疏环氧化的湖泊沉积物对于改善水质至关重要.
- 疏材料的脱水和利用对于回收等资源和避免浪费至关重要.
- 现有的方法需要高效和低能耗的脱水技术来处理大量的沉积物.
研究的目的:
- 实验性地研究在疏的湖泊沉积物上电化脱水的机制和性能.
- 分析不同电流对排水效率,水分含量和能源消耗的影响.
- 为了评估重金属,分布和脱水后的pH值的变化.
主要方法:
- 在最初的重力过后,使用电透法对1升的疏沉积物样本进行脱水.
- 不同电流的应用:20 mA,40 mA和60 mA.
- 分析脱水性能,水分含量,能源消耗和化学成分 (金属,P,pH).
主要成果:
- 通过去除自由和间歇性水,电透式脱水使沉积物质减少7-20%.
- 在24小时40mA和6小时60mA的情况下,可以达到最佳的脱水效果.
- 在60mA时观察到较低的能量消耗 (0.201千瓦时/千克去除的水),辅助于欧姆加热,相比于24小时的40mA (0.473千瓦时/千克去除的水).
- 没有观察到重金属或的显著提取,这有助于水排放和沉积物再利用.
结论:
- 电化脱水是一种有效的,易于操作的技术,用于处理疏沉积物.
- 该过程实现了与低压过相比较的脱水,但能耗显著降低.
- 最少的污染物提取允许安全的水排放和处理的沉积物的潜在利用.
相关概念视频
Electrodeposition
625
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...
625
Capillary Electrophoresis: Applications
375
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
375
Coagulation
280
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...
280
Electrogravimetric Analysis: Overview
220
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...
220


