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Factors Affecting The Performance Of Activated Carbon

Factors Affecting The Performance Of Activated Carbon

Granular activated carbon (GAC) is commonly used in for the removal of natural constituents and residual disinfectants in water supplies to improves the style and minimizing well being hazards;It protects other water treatment parts corresponding to RO membranes and ion change resins from doable organic fouling and damages . Because of its multi functional nature . Activated carbon is a favored water therapy approach and the truth that it adds nothing detrimental to the treated water.

Most activated carbons are made from raw supplies equivalent to nutshells, anthracite coal price per ton 2018 , wood and petroleum.
The 2 primary 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 efficiency of activated carbon are:

pH:The natural removal exercise decreases with the increase 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 percent for every pH unit above impartial .
Molecular weight:The adsorbing property of activated carbon will increase with the rise in its molecular weight .. Nonetheless, the pores sizes on the surface of the carbon should be large sufficient to permit the molecules to move within. A combination of low and high molecular weight molecules ought to be designed and used species tough to removed..
Contaminant concentration:
Higher the contaminant focus, the higher is the removal capability of activated carbon. The contaminant is more prone to be adsorbed. As concentrations enhance, nonetheless, so do effluent leakages. The upper restrict for contaminants is a few hundred PPM . Higher contaminant concentration could require extra contact time with the activated carbon. Also, the organic removal is enhanced by the presence of hardness within the water, so whenever doable, it's good to put activated carbon models upstream of the ion removal units
Particle dimension:
Activated carbon commonly available sizes are in 20 /50 mesh ,12 / forty mesh and eight / 30 mesh . The finer mesh offers the best contact and better removal.
Temperature:
viscosity decreases with the rise in temperature , thereby increasing adsorption rate.
Flow rate:
Usually, the decrease the stream rate, the more time the contaminant will get diffuse into the pore and be adsorbed.