Silver-impregnated activated carbon

Short Description:

This product is manufactured from high-strength fruit-pit shells using a specialized pyrolysis process. It possesses unique bactericidal and bacteriostatic properties. It effectively removes unpleasant odors, off-flavors, and trace toxic or harmful substances from water, rendering the purified water safe for direct consumption. It is also widely used as a filter medium for small, medium, and large-scale water purifiers and drinking water dispensers.

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Product Detail

Product Tags

Product Description:

By loading silver nanoparticles or silver ions onto a standard activated carbon substrate, the material gains dual functionality—adsorption and antibacterial properties—effectively addressing the common issues of bacterial proliferation within carbon filter beds and the resulting secondary contamination of the effluent.
Commonly used substrates include coconut shell-based activated carbon (favored for its high mechanical strength, well-developed pore structure, and low ash content), as well as other types such as fruit shell-based, extruded coal-based, or powdered activated carbon impregnated with silver.

Specification：

Project		Index
Particle size 8-18 mesh 10-24 mesh	%	≥95
Iodine value	mg/g	≥1000
Intensity	%	≥95
Water content	%	≤25
Methylene blue decolorizing power	ml	≥9
Ash content	%	≤5
Apparent density	g/ml	0.45-0.55
PH value		6-8
Silver content	%	0.6-3

Working principle

1. Activated carbon: Adsorbs residual chlorine, off-colors and odors, organic matter, and certain heavy metals.
2. Silver ions/nanosilver: Slowly release silver ions that disrupt bacterial cell membranes and enzyme systems; provide broad-spectrum antibacterial action (effective against *E. coli*, *Staphylococcus aureus*, etc.) with a low risk of inducing bacterial resistance.

Application：

1. Water Purification: Residential water purifiers, direct-drinking water dispensers, water purification systems for schools/commercial use, water for food and beverage production, and water dispenser filter cartridges (BBC silver-loaded carbon filters).
2. Air Purification: Filters for fresh-air systems and air conditioners; these provide odor adsorption while inhibiting mold and bacterial growth on the filter media.
3. Industrial Water Treatment: Bacteriostatic treatment for slightly polluted water, reclaimed water, and circulating water; also used in the pre-treatment of purified water for certain pharmaceutical applications.
4. Specialized Applications: Recovery of precious metals.

Advantages

- Dual-action performance: Adsorbs pollutants while inhibiting bacterial growth within the carbon bed, extending the service life of the filter cartridge.
- Broad-spectrum antibacterial efficacy; no risk of developing resistant bacterial strains.
- Compliant product with low silver leaching; suitable for use in drinking water and food industry applications.
- Available in granular form for easy loading into filter canisters, or in powder form for integration into manufacturing processes.

Comparison with Standard Activated Carbon

- Standard Activated Carbon: Functions solely through adsorption. Once saturated, it easily becomes a breeding ground for bacteria, often leading to bacterial levels in the filtered water that exceed safety limits.
- Silver-Impregnated Activated Carbon: Combines adsorption with antibacterial properties. It inhibits bacterial growth within the carbon bed, ensuring greater hygienic safety for the filtered water—though it comes at a higher price.