1, Appearance and Form Inspection
Color and Shape
High quality apricot shell activated carbon: It is dark black or dark gray in color, with uniform, short and straight particle shapes, and no rust or gray white spots on the surface.
Poor quality apricot shell activated carbon: The color is grayish or mixed, the particle shape is slender, curved, and damaged, which may lead to a decrease in adsorption performance due to poor production processes.
Particle integrity
Gently pinch the particles with your hands, high-quality apricot shell activated carbon has a hard texture and is not easily broken; Poor quality products are fragile or lose powder, indicating insufficient mechanical strength.
2, Performance testing methods
Bubble test
Put the apricot shell activated carbon into clean water and observe the formation of bubbles:
High quality activated carbon: Within 30 seconds, it produces a large number of continuous fine bubbles (in a linear shape) accompanied by a "hissing" sound, and the water quality becomes noticeably clear within 5 minutes.
Poor quality activated carbon: with few and discontinuous bubbles, fast sinking speed, turbid or no significant improvement in water quality.
Decolorization ability test
Take colored liquid (such as red ink diluent), add apricot shell activated carbon, and let it stand for 20 minutes:
High quality activated carbon: The liquid color significantly lightens or approaches transparency, indicating its strong ability to adsorb pigment molecules.
Poor quality activated carbon: The decolorization effect is weak or unchanged.
Weight comparison
Under the same volume, high-quality apricot shell activated carbon has developed pores, low density, and a lighter hand feel; Poor quality products have significantly heavier weight due to fewer pores or impurities.
Iodine adsorption value
The iodine value of high-quality apricot shell gold activated carbon should be ≥ 900 mg/g, and its adsorption performance is directly related to the capture efficiency of gold cyanide complexes.
Wear resistance strength
Through mechanical strength testing, high-quality apricot shell activated carbon has a wear resistance strength of ≥ 90%, making it suitable for low-intensity mixing processes such as heap leaching.
Comprehensive judgment process
Step by Step Method: High Quality Standard, Poor Quality Performance Reference Source
1. Appearance inspection: Ink black, uniform gray white particles, and damaged particles
2 Bubble Test: The bubbles are dense and last for more than 3 minutes, with few or rapid disappearance
3 decolorization experiment decolorization rate ≥ 80% decolorization rate ＜ 30%
4. Compared to the same volume, the weight is lighter and heavier
The above method can quickly screen for apricot shell activated carbon with high adsorption performance and durability, which is suitable for scenarios such as gold extraction and water treatment. If precise indicators such as iodine value and ash content are required, it is recommended to combine laboratory testing.
