Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

3.0K
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...
3.0K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

665
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...
665
Electrodeposition01:08

Electrodeposition

828
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...
828
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

2.3K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
2.3K
Colloidal precipitates01:09

Colloidal precipitates

2.0K
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...
2.0K
Qualitative Analysis03:46

Qualitative Analysis

23.0K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
23.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

N6-methyladenosine demethylase ALKBH5 mediates remote ischemic postconditioning in cerebral ischemia-reperfusion injury by regulating KLF4.

Brain research bulletin·2026
Same author

Integrative transcriptomic and machine learning analysis identifies key extracellular matrix-related genes in diabetic retinopathy.

Scientific reports·2026
Same author

Adaptation and validation of the chinese movement assessment battery for children-second edition.

Acta psychologica·2026
Same author

Nomogram-Based Prediction Model for Postherpetic Neuralgia in Immunosuppressive Patients.

Journal of clinical medicine·2026
Same author

Clinical outcomes of acupuncture combined with Jieyu Huoxue Formula in optic atrophy: effects on hemorheology and retrobulbar blood flow.

Brain research·2026
Same author

Evaluating Human Rod Photoreceptor Function Using Pixelwise Intensity-Based Optoretinography.

Translational vision science & technology·2026

Related Experiment Video

Updated: Oct 30, 2025

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
11:14

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

Published on: February 21, 2017

12.6K

Selective Complex Precipitation for Ferro-Chrome Separation From Electroplating Sludge Leaching Solution.

Li Jinhui1, Wang Ying1, Wang Yudong1

  • 1School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, China.

Frontiers in Chemistry
|July 5, 2021
PubMed
Summary
This summary is machine-generated.

This study presents an effective method for separating iron from chrome in electroplating sludge using benzoic acid. The process achieves high iron separation rates with minimal chromium loss, offering a viable solution for sludge treatment.

Keywords:
complex precipitationelectroplating sludgeselectivethe separation of ferrochromiumtransformation

More Related Videos

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.4K
Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
05:52

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

3.1K

Related Experiment Videos

Last Updated: Oct 30, 2025

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
11:14

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

Published on: February 21, 2017

12.6K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.4K
Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
05:52

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

3.1K

Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Industrial Chemistry

Background:

  • Electroplating sludge poses environmental challenges due to the presence of heavy metals like chromium and iron.
  • Efficient separation of these metals is crucial for waste management and resource recovery.

Purpose of the Study:

  • To develop an effective method for separating iron (Fe3+) from chromium (Cr3+) in electroplating sludge.
  • To investigate the complexation and precipitation mechanism using benzoic acid as a complexing agent.

Main Methods:

  • Complexation and precipitation using benzoic acid (C6H5COOH) as the complexing agent.
  • Optimization of reaction conditions: Fe3+:C6H5COOH molar ratio (1:3), temperature (30°C), pH (2.5), and reaction time (2 min).
  • Analysis of separation products using XRD, fluorescence spectroscopy, infrared spectroscopy, and H NMR spectroscopy.

Main Results:

  • Achieved a 97.38% separation rate for iron with only 3.59% chromium loss.
  • Identified that benzoic acid preferentially complexes with iron, leading to the precipitation of iron benzoate.
  • Iron benzoate crystals exhibited fine particle size, rapid settling, and ease of filtration.

Conclusions:

  • Benzoic acid effectively facilitates the selective separation of iron from chromium in electroplating sludge.
  • The developed precipitation method is efficient and practical for industrial applications.
  • The study provides insights into the chemical mechanism governing the ferrochrome separation process.