Factors Affecting The Performance Of Activated Carbon

Factors Affecting The Performance Of Activated Carbon

Granular activated carbon (GAC) is commonly utilized in for the removal of natural constituents and residual disinfectants in water supplies to improves the style and minimizing health hazards;It protects different water therapy components corresponding to RO membranes and ion alternate resins from possible organic fouling and damages . Due to its multi purposeful nature . Activated carbon is a favored water treatment approach and the truth that it adds nothing detrimental to the treated water.

Most activated carbons are made from raw materials corresponding to nutshells, coal , wood and petroleum.
The 2 basic principal by which activated carbon removes contaminants from water are adsorption and catalytic reduction. Organics wastes are removed by adsorption and residual disinfectants are removed by catalytic reduction.
Factors affecting the performance of activated carbon are:

pH:The natural removal activity decreases with the rise in pH. Most organics compounds are less soluble and more readily adsorbed at a decrease pH. . A thumb rule is to extend the carbon bed measurement by 20 % for each pH unit above impartial .
Molecular weight:The adsorbing property of activated carbon increases with the rise in its molecular weight .. However, the pores sizes on the surface of the carbon should be massive enough to allow the molecules to move within. A mixture of low and high molecular weight molecules should be designed and sand filter rainwater harvesting used species difficult to removed..
Contaminant concentration:
Higher the contaminant focus, the higher is the removal capacity of activated carbon. The contaminant is more more likely to be adsorbed. As concentrations increase, nonetheless, so do effluent leakages. The higher limit for contaminants is a few hundred PPM . Higher contaminant focus may require further contact time with the activated carbon. Additionally, the natural removal is enhanced by the presence of hardness in the water, so at any time when possible, it's good to put activated carbon models upstream of the ion removal models
Particle dimension:
Activated carbon commonly available sizes are in 20 /50 mesh ,12 / forty mesh and 8 / 30 mesh . The finer mesh offers the best contact and higher removal.
viscosity decreases with the increase in temperature , thereby rising adsorption rate.
Circulation rate:
Usually, the decrease the stream rate, the more time the contaminant will get diffuse into the pore and be adsorbed.


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