A number of studies have reported dye removal using adsorption. However, this does not degrade the dye. The adsorbent still need to be dealt with after the process.
Depending on the dye, various biological and chemical treatment (e.g. advanced oxidation process) methods have been reported to be effective.
A number of studies have reported dye removal using adsorption. However, this does not degrade the dye. The adsorbent still need to be dealt with after the process.
Depending on the dye, various biological and chemical treatment (e.g. advanced oxidation process) methods have been reported to be effective.
Adsorption is one of the method for removal of color, Activated carbon is more effective than any other method
Dear Alok Suman: I am not sure that activated carbon is effective sorbent for all classes of dyes (e..g Acid Dyes, Natural Dyes, Basic (Cationic) Dyes, Synthetic Dyes, Direct (substantive) Dyes, Disperse Dyes, Sulfur Dyes, Pigment Dyes, Mordant Dyes, Vat Dyes, Reactive Dyes, Macromolecular Dyes, Metallized Dyes, Naphthol Dyes, Premetallized Dyes, Gel Dyeing, Developed Dyes, Azo Dyes, Aniline Dyes, Anthraquinone Dyes). In some casses much more effective removal of dyes can be achieved by different treatment, for example Fenton´s oxidation.
Regards
Vit
Sequential anaerobic-aerobic-aop seems to be logical, efficient and economical treatment technique to remove most of the class of dyes (Azo, reactive, vat, etc.) from industrial wastewater.
Azo bond or carbon carbon double bond in most of them can be reduced and decolorised during anaerobic treatment. During aerobic treatment and or AOP the benzene ring can be broken down to carbon dioxide and water depending on the functional groups on the benzene ring.
Many methods are available, but adsorption is generally recognized as one of the effective and economical methods for the removal of dyes from industrial wastewater.
This paper may help:
the material used for dye absorption depends on the nature of the charges carried by the dye.
if the dye is anionic then it is necessary to have cationic structure materials (for example LDH) or to work in a saline solution in such a way as to fix the cation of the salt on the surface of the material.
if the dye is cationic, the material must be anionically charged on its surface.
- Badges
- Science topic
- Similar topics
- Econ
- Manufacturing
- Industry