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Carbon Selection Chart

Carbon Selection Chart

As a leading master distributor of activated carbon, granular activated carbon, and liquid phase-activated carbon, Nalco Pretreatment Solutions (PTS) has vast experience in helping customers select the best carbon to use with their equipment and application. Unlike many distributors, we manufacture activated carbon filters and have engineers and activated carbon specialists on staff to assist in the selection of the best carbon for your application. Please refer to the Carbon Selection Chart below and contact us if you need assistance.

We are a stocking distributor for Calgon, Jacobi, Norit and our own Res-Karb brand activated carbon. All products meet or exceed AWWA B100 and are listed under NSF Standard 61.

Application

Comments

Product

Taste and Odor
Chlorine Removal
Low Level Organics

Carbon reacts with chlorine; it is not absorbed. Iodine number not relevant. Use on city supplies and chlorinated well water for taste and odor.

CL1240
JCL1240
F-200
GAC40S

Pre-Filtration to Demineralizers, Softeners, etc.

Strictly dechlorination

JCL1240
F-200

Pre-Filtration to Demineralizers, Softeners, etc.

Organics loading

F-300/F-400
GAC40S
JCL1240

Ultra Pure

Coconut-based carbon ahead of RO. If pH is critical, use acid washed.

CS-1240
CPG-LF
GAC-1240+
AQUASORB 2000

Hydrogen Sulfide

Use carbon with enhanced catalytic sites. In extreme cases, add chlorine or peroxide.

CENTAUR

Low Level VOCs
Gasoline
Benzene
Toluene
TCE

Do not backwash with untreated water to avoid fouling bed. These molecules are best adsorbed by carbons with a high iodine number.

F-300/F-400
GAC830/1240
JCL1240

High Level VOCs
Gasoline
Benzene
Toluene
TCE

Same as above for Low Levels, plus: Use more or larger tanks as flow requires. Longer contact times are necessary.

F-300/F-400
GAC830/1240
JCL1240

Color Removal

Color molecules are large and best adsorbed by carbons with high molasses numbers (lignite).

DARCO 1240

Chloramine

Carbon with enhanced catalytic sites works 2 to 3 times better than standard carbon.

CENTAUR

THM

These molecules are small so coconut carbon works well in this application. Consider contaminants when applying.

CS-1240

MTBE

Found in well water supplies, MTBE is a gasoline additive and known carcinogen.

F-600

Kidney Dialysis

Watch for pH shifts; acid washed usually preferred. Where chloramine is present, consider CENTAUR.

CPG-LF

CENTAUR

 

Disclaimer for Carbon Selection Chart

All suggestions and recommendations above concerning the use of activated carbon are based on our experience and currently available reliable data. We cannot control the use of these products by others. No guarantee is either expressed or implied by any suggestion or recommendation by Nalco PTS, nor should any information contained here be construed as a recommendation to infringe any currently valid patent.

Notes on Carbon Selection Chart

  • Vigorous backwashing of the bed after installation is recommended. This will remove fines and more importantly, will reclassify the bed according to particle size. If this classification doesn't take place right away, you risk mixing exhausted carbon with the good carbon each time you backwash. Consult Nalco PTS for more details on these applications.
  • The capacity of activated carbon to remove specific substances and mixtures depends on the nature of the specific chemical compounds, their concentration, conditions of adsorption (temperature, pressure, contact time, etc.), and how the activated carbon is applied to the problem. In order to provide contact times and usage rates, Nalco PTS would need a full water analysis.
  • What carbon cannot do: water softening, bactericidal treatment, desalinating, heavy metals removal.

Raw Materials Used to Manufacture Activated Carbon

The following raw materials are used in the manufacture of activated carbon:

  • Bituminous Coal - This coal has both large and small pores and is a good general purpose carbon for this reason. Coal is easy to reactivate and is good for chlorine removal.
  • Lignite Coal - Lignite is a soft wood-based carbon and very light in density. It has a low iodine number and a high molasses number. Use lignite coal in applications requiring large pores, for example, in color removal. High attrition when reactivated. Good for chlorine removal.
  • Coconut - Coconut is the hardest and least dusty of all the base materials. It has the highest iodine number and is good for small or low molecular weights. Price may vary due to growing conditions

Posted on April 7, 2015 by Brian Krummel

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Nalco Pretreatment Solutions (PTS) is a leading manufacturer and supplier of services, systems and supplies for industrial and commercial water pretreatment systems for treating process water, product water, boiler pretreatment, and drinking water.
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