Powdered activated carbon (PAC) is a carbon material with high adsorption performance, which is widely used in water treatment, environmental protection, food, medicine and other fields due to its small particle size (usually < 0.18mm) and large specific surface area (500-1500㎡/g). The following are its core application scenarios and technical details:

1. Water treatment field
Drinking water purification

Remove organic matter: adsorb dissolved organic matter (such as humic acid) and pesticide residues (such as DDT) in water.

Decolorization and odor removal: Eliminate odors caused by algae metabolites (geosmin and 2-MIB).

Emergency treatment: Rapid dosing in case of sudden pollution (such as chemical leakage) (dose 5-50mg/L).

Sewage treatment

Industrial wastewater: treatment of printing and dyeing wastewater (decolorization rate >90%), electroplating wastewater (adsorption of heavy metal ions).

Municipal sewage: Deep treatment of refractory COD (chemical oxygen demand), especially suitable for "fine treatment" after biochemical method.

Special water quality problems

Microcontaminated water: Remove low-concentration antibiotics, endocrine disruptors (e.g., bisphenol A).

Pool water: adsorbs chloramine (reduces pungent odors).

2. Environmental protection and industrial applications
Exhaust gas treatment

VOCs adsorption: treat organic exhaust gases (toluene, xylene, etc.) in the printing and spraying industries.

Mercury emission control: Capture of mercury in flue gas from coal-fired power plants (mixed with fly ash).

Soil remediation

Organic polluted soil: adsorb petroleum hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) to reduce biological toxicity.

Food & Medicine

Decolorization and refining: pigment removal in the production of sucrose and monosodium glutamate (food grade PAC).

Pharmaceutical purification: impurity adsorption of antibiotic (such as penicillin) fermentation broth.

3. Advantages and limitations
Advantage:

The response speed is fast (15-30 minutes effective), suitable for emergency treatment.

No fixed equipment is required, and the dosing is flexible (compared to granular activated carbon).

Limitations:

Difficult to recycle (single-use, high cost)