相关实验视频

Updated: Jun 27, 2025

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

用PAAS修改的MgCO₃/Mg(OH)₂合物对Cd污染的地下水进行性修复的新方法

Bowen Li¹, Meiling Tang¹, Peng Wang¹

¹State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059. China.

|May 2, 2024

概括

一种新的碳酸/氧化 (MgCO3/Mg(OH) 2) 合物有效地稳定了地下水中的 (Cd). 这种合物增强了Cd的去除,为含水层中重金属的修复提供了一个有希望的解决方案.

科学领域:

环境科学环境科学
地质化学地质化学
水处理处理水的方法

背景情况:

氧化 (Mg(OH) 2) 是一种缓慢溶解的性来源,用于在位地地下水整治.
由于Cd(OH) 2的溶解性,Mg(OH) 2对 (Cd) 稳定性的有效性有限.
开发增强试剂对于有效重金属修复至关重要.

研究的目的:

为了研究聚烯酸盐 (PAAS) 修改的MgCO3/Mg(OH) 2合物在从地下水中去除Cd的有效性.
优化MgCO3与Mg(OH) 2的比率,以提高Cd的稳定性.
通过柱体实验来评估合物在水表修复中的性能.

主要方法:

通过PAAS的超声波分散制备MgCO3/Mg(OH) 2合体,用于表面修饰.
环状颗粒大小和表面电荷的表征.
列实验评估Cd稳定性和分数变化在含水层介质.
确定最佳的MgCO3:Mg(OH) 2比率 (1:1).

主要成果:

经过PAAS修改,可以获得稳定的MgCO3/Mg(OH) 2合物,具有增强的迁移能力.
1:1的MgCO3/Mg(OH) 2比率显示出最佳的Cd稳定.
专研究显示可交换Cd的显著减少,从88.61%降至22.50-34.38%.

结论:

经过PAAS修改的MgCO3/Mg(OH) 2合物是一种高效的试剂,用于在地下水中进行现场Cd整治.
合体的增强移动性和双沉/pH缓冲机制提高了Cd的稳定性.
这项技术为处理被重金属污染的含水层提供了一个有前途的方法.

关键词:

在 Cd 稳定中使用 Cd 稳定.地下水的地下水.合物合物合物合物合物合物合物合物合物多烯酸是一种多烯酸.

更多相关视频

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

相关概念视频

Bioremediation

Bioremediation

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.

Coagulation

Coagulation

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...

Factors Affecting Solubility

Factors Affecting Solubility

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:

Extraction: Advanced Methods

Extraction: Advanced Methods

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...