Related Experiment Video
Updated: Mar 14, 2026
07:23
Fabrication of Thin Film Silver/Silver Chloride Electrodes with Finely Controlled Single Layer Silver Chloride
Published on: July 1, 2020
15.1K
Halide removal from aqueous solution by novel silver-polymeric materials.
Polo A M S1, Velo-Gala I1, Sánchez-Polo M2
1Department of Inorganic Chemistry, University of Granada. 18071, Granada, Spain.
The Science of the Total Environment
|October 5, 2016
Summary
This study shows silver-doped polymeric cloth (Ag-cloth) effectively removes bromide and iodide from water. Its halide removal capacity is optimized with hydrogen peroxide (H2O2) and varies with pH, showing higher iodide removal efficiency.
Area of Science:
- Environmental Science
- Materials Science
- Chemistry
Background:
- Halide contamination in water poses environmental and health risks.
- Developing efficient and selective materials for halide removal is crucial.
Purpose of the Study:
- To analyze the performance of silver-doped polymeric cloth (Ag-cloth) for bromide and iodide removal from aqueous solutions.
- To investigate the influence of hydrogen peroxide (H2O2) concentration and pH on the material's adsorption capacity.
Main Methods:
- Synthesis and characterization of silver-doped polymeric cloth (Ag-cloth).
- Batch adsorption experiments to evaluate bromide and iodide removal.
- Investigation of the effects of H2O2 concentration, pH, and interfering substances (organic matter, chloride) on adsorption.
- Analysis of silver ion (Ag+) behavior and reaction mechanisms during the process.
Main Results:
- Ag-cloth demonstrates selective adsorption of halide ions, forming silver halides.
- The removal capacity increases with H2O2 concentration up to 55 μM, reaching a plateau (Xm ≈ 1.3-1.8 mg halide/g Ag-cloth).
- Ag-cloth exhibits higher efficiency for iodide removal than bromide.
- Organic matter and chloride ions reduce the removal capacity for both halides.
- Adsorption capacity is pH-dependent, with higher removal at pH 9.
Conclusions:
- Ag-cloth is a promising material for selective halide removal from water.
- Optimizing H2O2 concentration and pH is key to maximizing removal efficiency.
- The material's performance can be affected by water matrix composition.
Related Concept Videos
03:11Precipitation of Ions
30.7K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.7K
00:56Extraction: Advanced Methods
1.3K
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...
1.3K
03:45Formation of Complex Ions
26.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.5K
01:09Colloidal precipitates
6.7K
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...
6.7K
03:03Chemical Reactions in Aqueous Solutions
74.8K
Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
74.8K
01:14Acid Halides to Ketones: Gilman Reagent
4.3K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
4.3K