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EC number: 237-875-5 | CAS number: 14038-43-8
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: data is from peer reviewed journal
- Justification for type of information:
- data is from peer reviewed journal
- Qualifier:
- according to guideline
- Guideline:
- other: refer principle below
- Principles of method if other than guideline:
- To determine Adsorption of test chemical Prussian blue on the surface of goethite at pH 4.8
- GLP compliance:
- not specified
- Type of method:
- other: spectroscopy
- Media:
- other: geothite
- Specific details on test material used for the study:
- - Name of test material: Prussian blue
- IUPAC name: C.I. Pigment Blue 27
- Molecular formula: C6FeN6.4/3Fe
- Molecular weight: 859.23 g/mol
- Smiles : [CH-](#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[CH-](#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[CH-] (#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[Fe+3].[Fe+3].[Fe+3].[Fe+3]
- InChI : 1S/18CN.7Fe/c18*1-2;;;;;;;/q18*-1;3*+2;4*+3
- Substance type: Inorganic
- Physical state: Solid powder (dark blue) - Radiolabelling:
- not specified
- Test temperature:
- 295.14 K
- Key result
- Type:
- other:
- Temp.:
- 295.14 K
- Matrix:
- Geothite
- Remarks on result:
- other: strong sorption on geolite
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The target chemical Prussian blue is strongly adsorbed to geolite. Goethite is common component of soil.
- Executive summary:
The target chemical Prussian blue is hydrolyzed at higher pH values, the liberated hexacyanoferrate ions are strongly sorbed at the iron oxide hydroxides that already exist in the soil or that have just been formed by hydrolysis of the Prussian blue.
The results obtained indicate that the interaction of Prussian blue colloids and of dissolved hexacyanoferrate ions with goethite can strongly retard the transport processes of these compounds in soils. These processes help to immobilize Prussian blue in soils. Since free cyanide ions quickly form hexacyanoferrate ions with the ubiquitous iron ions of the soil, the iron ions are also responsible for trapping damped cyanides in soils. Goethite is found all over the planet, usually in the form of concretions, stalactitic formations, oolites (a form consisting of tiny round grains cemented together), reniform (kidney shapes) or botryoidal (globular, like bunches of grapes) accumulations.
The target chemical Prussian blue is strongly adsorbed to geolite. Goethite is common component of soil.
Reference
Data from the IR Spectroscopic Investigations of Prussian Blue Particles Sorbed at Goethite
load (g CN-/kg)
|
V1(CN) cm-1
|
T1 |
A1 |
V2(CN)
|
T2 |
A2 |
10 |
2077 |
0.889 |
0.051 |
2026 |
0.897 |
0.047
|
18.9 |
2085 |
0.715 |
0.146 |
2026 |
0.964 |
0.016
|
25.6 |
2086 |
0.584 |
0.234 |
2026 |
0.924 |
0.034
|
25.7 |
2085 |
0.567 |
0.246 |
2026 |
0.930 |
0.032
|
36.7 |
2085 |
0.424 |
0.373 |
2026 |
0.900 |
0.046
|
P.b.a |
2087 |
0.086 |
1.066 |
2026 |
0.737 |
0.133
|
Description of key information
The target chemical Prussian blue is strongly adsorbed to geolite. Goethite is common component of soil.
Key value for chemical safety assessment
Additional information
The target chemical Prussian blue is hydrolyzed at higher pH values, the liberated hexacyanoferrate ions are strongly sorbed at the iron oxide hydroxides that already exist in the soil or that have just been formed by hydrolysis of the Prussian blue.
The results obtained indicate that the interaction of Prussian blue colloids and of dissolved hexacyanoferrate ions with goethite can strongly retard the transport processes of these compounds in soils. These processes help to immobilize Prussian blue in soils. Since free cyanide ions quickly form hexacyanoferrate ions with the ubiquitous iron ions of the soil, the iron ions are also responsible for trapping damped cyanides in soils. Goethite is found all over the planet, usually in the form of concretions, stalactitic formations, oolites (a form consisting of tiny round grains cemented together), reniform (kidney shapes) or botryoidal (globular, like bunches of grapes) accumulations.
The target chemical Prussian blue is strongly adsorbed to geolite. Goethite is common component of soil.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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