Methanaminium, N-[4-[[4-(dimethylamino)phenyl]phenylmethylene]-2,5-cyclohexadien-1-ylidene]-N-methyl-, ethanedioate

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

weight of evidence

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The experiment is scientifically acceptable, nevertheless details about test method and procedures are missing. Read across from a similar substance which has the same main component and with a different counter ion that does not influence the characteristics related to the specific end-point.

Data source

Reference

Reference Type:

publication

Title:

Sorption of basic and acid dyes from aqueous solutions onto oxihumolite.

Author:

Janos P., Sedivy P., Ryznarova M., Grotschelova S.

Year:

2005

Bibliographic source:

Chemosphere 59 (2005) 881-886

Materials and methods

Principles of method if other than guideline:

Naturally occurring kind of weathered and oxidised young brown coal called oxihumolite was used for an adsorptive removal of basic (Methylene Blue, Malachite Green) as well as acid (Egacid Orange, Midlon Black) dyes from waters. It was shown that both kinds of dyes can be sorbed onto oxihumolite. The maximum sorption capacities determined from the parameters of Langmuir isotherms ranged from 0.070 mmol/g (for Midlon Black) to 0.278 mmol g1 (for Malachite Green) and did not differ significantly for basic and acid dyes.

GLP compliance:

not specified

Type of study / information:

Adsorpion test

Test material

Test material information

Constituent 1

Reference substance name:

Malachite Green

IUPAC Name:

Malachite Green

Results and discussion

Any other information on results incl. tables

It was found that oxihumolite can be used for the sorption of both basic as well as acid dyes from aqueous solutions. The maximum sorption capacities ranged from 0.070 mmol/g to 0.278 mmol/g and are comparable with the capacities of other sorbents suggested for the dye removal. The sorption capacities did not differ significantly for basic and acidic dyes.

Effect of pH on the dye adsorption

The sorption of Malachite Green decreased slightly with increasing pH

Applicant's summary and conclusion

Conclusions:

It was found that oxihumolite can be used for the sorption of both basic as well as acid dyes from aqueous solutions. The maximum sorption capacities ranged from 0.070 mmol/g to 0.278 mmol/g and are comparable with the capacities of other sorbents suggested for the dye removal. The sorption capacities did not differ significantly for basic and acidic dyes.

Executive summary:

Naturally occurring kind of weathered and oxidised young brown coal called oxihumolite was used for an adsorptive removal of basic (Methylene Blue, Malachite Green) as well as acid (Egacid Orange, Midlon Black) dyes from waters. It was shown that both kinds of dyes can be sorbed onto oxihumolite. The maximum sorption capacities determined from the parameters of Langmuir isotherms ranged from 0.070 mmol/g (for Midlon Black) to 0.278 mmol/g (for Malachite Green) and did not differ significantly for basic and acid dyes.

Conclusion

It was found that oxihumolite can be used for the sorption of both basic as well as acid dyes from aqueous solutions. The maximum sorption capacities ranged from 0.070 mmol/g to 0.278 mmol/g and are comparable with the capacities of other sorbents suggested for the dye removal. The sorption capacities did not differ significantly for basic and acidic dyes.