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The adsorption is the process of accumulating substances that are in solution on a suitable interface. Adsorption is a mass transfer operation in that a constituent in liquid phase is transferred to the solid phase. The adsorbate is the substance that is being removed from the liquid phase at the interface. The adsorbent is the solid, liquid or gas phase on to which the adsorbate accumulates. The adsorption process has not been used extensively in waste water treatment, but demands for a better quality of treated waste water effluent, including toxicity reduction, have led to an intensive examination and use of the process of adsorption on activated carbon. Activated carbon treatment of waste water is usually thought of as a polishing process for water that has already received normal biological treatment. The carbon in this case is used to remove a portion of the remaining dissolved organic matter.
Many volatile organic compounds (VOCs) are toxic, posing a high risk to human health as a result of their widespread use and occurrence in workplace environments. Reducing the amount of organic vapours in ambient air is, therefore, an important task. Activated carbons are the most versatile and frequently used adsorbents, and fixed beds of activated carbon, in the form of canisters or filters, are widely used for purifying contaminated air. Its large internal surface area and pore volume, its ability to absorb most organic vapours and low cost make activated carbon one of the most practical adsorbents.
Activated carbon beds eventually become exhausted after continuous exposure to air contaminated with organic vapours. The time at which an organic vapour of a defined concentration is able to penetrate the bed is known as the breakthrough time of the adsorbate. In practical situations, a key factor is the service life of the filter. This is defined as the time at which the concentration of the compound penetrating the filter reaches an unacceptable level. An accurate estimate of this service life is of great importance to both users and manufacturers. A predictive model for filter performance would reduce the need for time consuming filter tests, aid in the design of filters with optimized performance and provide knowledge of the service life of military filters exposed to conditions and chemicals encountered in civilian situations.
DOCUMENT IN COMPRESSED FILE
“Activated Carbon Adsorption” Seminar Report
Page Length: 26 Pages
- Activated Carbon
- Types Of Activated Carbon
- Application Of Activated Carbon
- Activated Carbon Adsoption Systems
- Adsorption Isotherm
- Advantages Of Activated Carbon Adsorption
- Limitations Of Activated Carbon Adsorption
Include with “Activated Carbon Adsorption” PPT
Page Length: 12 Pages
- ACTIVATED CARBON
- TYPES OF ACTIVATED CARBON
- ACTIVATED CARBON ADSOPTION SYSTEMS
- ADVANTAGES OF ACTIVATED CARBON ADSORPTION
- LIMITATIONS OF ACTIVATED CARBON ADSORPTION
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