Activated carbon is a cornerstone of modern water purification and wastewater treatment infrastructure. Through physical adsorption, activated carbon removes dissolved organic contaminants, chlorine, disinfection byproducts, pesticides, heavy metals, and trace synthetic chemicals from water streams. The global water treatment sector represents the single largest application for activated carbon, driven by tightening regulatory standards and increasing demand for clean water.
Granular Activated Carbon (GAC) is employed in fixed-bed contactors at municipal water treatment facilities to remove chlorine, chloramines, trihalomethanes (THMs), haloacetic acids (HAAs), pesticides, herbicides, and volatile organic compounds (VOCs). This ensures compliance with health-based drinking water standards and improves aesthetic qualities such as taste and odor.
Recommended Products: Coconut Shell GAC (12×40 mesh, 8×30 mesh), Coal-Based GAC (12×40 mesh)
Manufacturing facilities generate effluent containing organic pollutants, dyes, phenolic compounds, and chemical oxygen demand (COD) contributors. Activated carbon serves as a polishing step following biological treatment or as primary treatment for specific contaminant streams. Powdered Activated Carbon (PAC) is often dosed into activated sludge systems for combined biological-physical treatment.
Recommended Products: Coal-Based GAC, Powdered Activated Carbon (PAC), Granular Activated Carbon (8×30 mesh)
Contaminated groundwater sites impacted by industrial solvents, fuel oxygenates, or chlorinated hydrocarbons utilize activated carbon in pump-and-treat systems and permeable reactive barriers. The high surface area and microporous structure of coconut shell carbon are particularly effective for adsorbing VOCs such as trichloroethylene (TCE) and perchloroethylene (PCE).
Recommended Products: Coconut Shell GAC, Coal-Based GAC (high iodine grades)
Leachate from municipal solid waste landfills contains complex organic compounds, heavy metals, and ammonia. Activated carbon is used as part of multi-stage treatment trains to remove refractory organics and achieve discharge compliance.
Recommended Products: Coal-Based GAC, Granular Activated Carbon
Activated carbon filtration removes chloramines (combined chlorine), body oils, and organic contaminants, eliminating the characteristic “chlorine odor” and reducing eye and skin irritation for swimmers.
Recommended Products: Coconut Shell GAC (12×40 mesh)
Fish farming operations use activated carbon to remove dissolved organic compounds, medications, and metabolic byproducts from culture water, maintaining optimal water quality for stock health and growth.
Recommended Products: Coconut Shell GAC, Coal-Based GAC
Parameter |
Unit |
Coconut Shell GAC |
Coal-Based GAC |
Powdered Activated Carbon (PAC) |
Test Method |
|---|---|---|---|---|---|
Iodine Number
|
mg/g
|
900 – 1,200
|
600 – 1,000
|
800 – 1,000
|
ASTM D4607
|
Methylene Blue Adsorption
|
mg/g
|
150 – 210
|
80 – 150
|
120 – 180
|
ASTM D2330
|
Effective Size
|
mm
|
0.55 – 0.75
|
0.60 – 0.80
|
N/A
|
ASTM D2862
|
Moisture Content
|
%
|
< 5
|
< 5
|
< 5
|
ASTM D2867
|
Ash Content
|
%
|
< 5
|
< 12
|
< 8
|
ASTM D2866
|
Hardness
|
%
|
≥ 95
|
≥ 90
|
N/A
|
ASTM D3802
|
Particle Size
|
mesh
|
12×40, 8×30
|
12×40, 8×30
|
200, 325
|
ASTM D2862
|
Apparent Density
|
g/cm³
|
0.45 – 0.55
|
0.48 – 0.60
|
0.35 – 0.45
|
ASTM D2854
|
Surface Area (BET)
|
m²/g
|
900 – 1,300
|
500 – 900
|
700 – 1,000
|
ASTM D6556
|
pH Value
|
—
|
6 – 11
|
7 – 9
|
5 – 8
|
ASTM D3838
|
Uniformity Coefficient
|
—
|
≤ 1.9
|
≤ 1.9
|
N/A
|
ASTM D2862
|
Water Treatment Scenario |
Preferred Carbon Type |
Rationale |
|---|---|---|
Municipal Drinking Water (Chlorine Removal)
|
Coconut Shell GAC
|
High microporosity for small molecules, low ash
|
Industrial Wastewater (High Organic Load)
|
Coal-Based GAC
|
Cost-effective for bulk contaminant removal
|
Emergency Spill Response
|
Powdered Activated Carbon (PAC)
|
Rapid kinetics, immediate application
|
Groundwater Remediation (VOCs)
|
Coconut Shell GAC
|
Superior VOC adsorption capacity
|
Boiler Feed Water
|
Acid-Washed Coconut GAC
|
Minimal leachable ash and minerals
|
Coconut shell-based activated carbon offers high microporosity, making it exceptionally effective at removing chlorine, chloramines, and organic solvents from drinking water . Coconut shell also resists wear better than other materials, and its low ash and mineral content are critical for drinking water applications .
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