Lignite Base Activated Carbon Overview
Lignite coal, “often referred to as brown coal, is a soft brown combustible sedimentary rock formed from naturally compressed peat.” (Wikipedia) It is used as a base product for the manufacture of granular activated carbon (GAC). Compared to coal and coconut base carbons, it lighter in weight (lbs. per ft3), lower in iodine number and higher in molasses number.
Choosing Activated Carbon by Application - Specialty Carbon
| Coal Base | Lignite Base | ||||
|---|---|---|---|---|---|
| Type/Manufacturer | F400AR+/ F600AR+ 1240 Calgon | GAC40Plus 1240 Norit Americas | Centaur NDS 1240 Calgon | Hemoguard 1240 Calgon | HD4000 1240 Lignite Norit Americas |
| Taste & Odor | ✔ | ✔ | ✔ | ✔ | ✔ |
| Chlorine Removal - Dechlorination | ✔ | ✔ | ✔ | ✔ | ✔ |
| THM - Disinfection By Products | |||||
| Pre-Filtration Reverse Osmosis | |||||
| Pre-Filtration Demineralizer - Regenerable | |||||
| PEDI - SDI Exchange Tanks | |||||
| Chloramine Removal, Reduction | ✔ | ||||
| Color Removal | ✔ | ||||
| Low Level VOCs - Gasoline, Benzene, Toluene, TCE | |||||
| High Level VOCs - Gasoline, Benzene, Toluene, TCE | ✔ | ✔ | ✔ | ||
| MTBE | ✔ | ✔ | ✔ | ||
| Kidney Dialysis | ✔ | ||||
| Hydrogen Sulfide | ✔ | ||||
| PFOA/PFOC/PFOS | ✔ | ✔ | ✔ | ||
| In Stock at Urbans Aqua | ✔ | ✔ | ✔ | ||
| Specifications | |||||
Notes:
- These recommendations are based on our experience and currently available data.
- We are not responsible for the use or application of these products by others.
- No guarantee is either expressed or implied by any suggestion or recommendation.
Benefits & Advantages
Lignite base GAC pores are large making it useful for the reduction of similarly sized contaminants such as color pigments. Activated carbon adsorbs contaminants (adsorbates). The adsorbates stick to the pore; they are not absorbed into the carbon.
Advantages
- Large pore size/structure
- Competitively priced
- pH Stable
- Higher iodine number when compared to other lignite base carbon types
- Lignite base activated carbon may be used in residential applications and should be certified to have no residual metals such as arsenic.
Disadvantages
- Hardness Specification
Norit Americas (Formerly Cabot)
- Urbans Aqua supplies Norit Americas’ HydroDarco 4000 (HD4000).
- Meets AWWA B604.
- It is Kosher certified.
- Meets NSF/ANSI 61.
- HD4000 can be used to remove color bodies like tannic based color as post treatment to tannin removal systems. Doctor Frog suggests reviewing the tannin removal application before using carbon.
- Typical Bed Expansion During Backwash specification chart
- HydroDarco 4000 Specification Sheet norit-hydrodarco4000
PFAS Removal
- HD4000 is approved for use in the state of NY for the reduction of PFAS.
- Contact Urbans Aqua for help determining the correct carbon choice.
Norit -Infosheet-Removal-of-PFAS-from-Ground-and-Surface-Water
Why buy from Urbans Aqua?
- Urbans Aqua sources and stocks Hydo Darco 4000 lignite base GAC from Norit Americas (formerly Cabot).
- We assure product quality and consistently by sourcing from Norit, a reliable, single source manufacturer of activated carbon.
- Single source manufacturing ensures consistent product quality.
- Our carbon manufacturers source only raw materials tested to meet their specifications.
- The manufacturing process is strictly controlled.
- Prior to shipment to Urbans Aqua warehouses each lot is tested and certified to meet the specifications set forth in the product bulletin.
- Certificates of analysis shipped with each lot upon request of our customers.
- Reliable stock
- Urbans Aqua is a major distributor of activated carbon. Loyalty to our suppliers enables us to have consistent supply. As a result, we experience very few stock shortages.
- Single source manufacturing ensures consistent product quality.