同时的Cu (II) -EDTA解复和Cu (II) 恢复使用集成接触电催化和电容脱离离子从电废水
Xiaoyan Shen1, Shiyong Wang1, Lin Zhao2
1School of Environment and Civil Engineering, Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523106, Guangdong, China.
Journal of hazardous materials
|May 10, 2024
概括
这项研究引入了一种结合接触电催化 (CEC) 和电容脱离离 (CDI) 的新方法,用于高效的铜-乙烯基二胺四酸 (Cu-EDTA) 解复和铜离子回收. 该过程有效降解Cu-EDTA,并从工业废水中回收有价值的铜.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 传统的重金属分离方法与金属有机酸复合物作斗争.
- 现有的性沉技术资源密集,并产生污染.
- 有效处理含有金属复合物的工业废水仍然是一个挑战.
研究的目的:
- 开发一种创新的方法,以有效地解复铜 (II) -乙烯二胺三酸 (Cu-EDTA) 的复合.
- 从经过处理的废水中实现Cu2+离子的同步回收.
- 通过接触电催化 (CEC) 和电容脱离离子 (CDI) 来研究Cu-EDTA的降解机制.
主要方法:
- 在超声波刺激下利用接触电催化 (CEC) 与化乙烯 (FEP) 介电粉.
- 使用一个CuSe阴极的电容脱离离子 (CDI) 来捕获释放的Cu2+离子.
- 通过使用各种表征技术,研究了降解途径和中间体.
主要成果:
- 通过FEP产生的活性氧物种驱动的去氨化和脱碳化实现了Cu-EDTA的有效解复合.
- 证明脱碳化是CEC中的Cu-EDTA的主要降解途径.
- 在150分钟内达到Cu-EDTA86.4%的降解率,对其他金属复合物具有很好的适用性和循环稳定性.
结论:
- 联合CEC-CDI战略为处理含有金属复合物的工业废水提供了一种高效和新的方法.
- 阐明了 CEC 工艺中持久有机污染物的降解机制.
- 为推进金属回收和可持续废水管理提供了有前途的技术.
相关概念视频
Electrodeposition
626
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...
626
Precipitation and Co-precipitation
1.8K
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...
1.8K
Ion-Exchange Chromatography
450
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
450
EDTA: Auxiliary Complexing Reagents
580
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
580
Extraction: Advanced Methods
446
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...
446
Masking and Demasking Agents
2.4K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
2.4K


