Powdered activated carbon (PAC) is a black, finely ground material with a high internal surface area used for adsorbing impurities and contaminants from air and water. It is known for its ability to effectively remove color, odor, and other contaminants from liquids and gases, making it useful in various applications like water treatment and gas purification.
| Parameters |
Standard range |
Application scenarios |
Detection methods |
| Iodine adsorption value |
≥800-1000 mg/g |
Adsorption of liquid organic pollutants |
GB/T 12496.8-2015 |
| Methylene blue adsorption value |
≥150-220 mg/g |
Dye/macromolecule decolorization |
ASTM D3860 |
| Carbon tetrachloride adsorption rate |
≥60-75% |
Gas-phase VOCs adsorption |
GB/T 7702.7-2008 |
| Caramel decolorization power |
≥100-120% |
Sugar industry/food decolorization and refining |
HG/T 3921-2006 |
Physical property parameters
Particle size distribution
D50 (median particle size): 10-30μm (water treatment), 5-15μm (injection decolorization)
>75μm sieve residue: <5% (to prevent pipe blockage)
Apparent density: 0.3-0.5 g/cm³ (affects the selection of dosing equipment)
Water content: ≤10% (sealed packaging to prevent caking)
I. Chemical safety indicators
Indicators Food/pharmaceutical grade standards Industrial grade standards
Ash content ≤3% ≤8%
pH value 6.0-8.0 (neutral carbon) 5.0-10.0
Heavy metals (Pb) ≤10 ppm ≤50 ppm
Microbial limit ≤100 CFU/g –
Polycyclic aromatic hydrocarbons (PAHs) Not detected (16 items) –
II. Key parameters for application scenarios
Water treatment (municipal/industrial)
COD removal rate: ≥60% (dosage 50-100 mg/L)
Penetration time: >30 minutes (dynamic column experiment, flow rate 5 BV/h)
Food and medicine
Decolorization efficiency: sugar solution transmittance increased from 45% to >95% (625nm wavelength)
Dissolution control: ethanol soluble matter <0.1%
Air purification
Toluene adsorption: ≥350 mg/g (25℃, 10% relative humidity)
Specific surface area: ≥1000 m²/g (BET method)
III. Economic indicators
Parameters Customer focus Industry comparison data
Cost of water treatment per ton 0.2-0.8 yuan/ton (dosage related) 30-50% lower than granular carbon
Recycling rate Non-renewable (one-time) Some industries try thermal regeneration (loss >40%)
Packing specifications 20-25 kg moisture-proof bag (shelf life 24 months) Bulk tanker costs for major customers reduced by 15%
