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Look at the bubbles: When high-quality activated carbon is poured into water, a large number of tiny bubbles will be produced. When a handful of activated carbon is poured into the water, the water will gradually immerse itself in the pore structure of the activated carbon, forcing the air in the pores to expel, resulting in a series of tiny bubbles. Pulling out a tiny bubble line in the water while making a little bubble sound is very interesting. The stronger this phenomenon occurs and the longer it lasts, the better the adsorption effect of activated carbon.

Weighing method: the higher the adsorption capacity of high-quality activated carbon, the larger the pore size. The more activated carbon, the lighter the relative density. So high-quality activated carbon feels soft and light weight. If the activated carbon you choose is particularly heavy, it means that its adsorption capacity is not strong.

Observe water quality: high-quality activated carbon has strong decolorization ability. Take two clear glasses, put purified water in one cup, and drop a drop of red ink (here, any pigment that is easy to examine but does not change the properties of the water is fine, such as blue ink, printer color ink, but not ink and carbon ink). After mixing well, pour half of the colored water into another cup for comparison. Put activated carbon into colored water, the amount should reach more than half of the water, so that the effect will be obvious. After standing for 10-20 min, compare with a control water sample. Under the same conditions, the stronger the decolorization effect, the better the adsorption of activated carbon.

Touch feel: the activated carbon produced for the first time has a high hardness, at most only some ash is adsorbed on the surface, and the hands are not so dirty after throwing them away by hand. Inferior activated carbon, especially recycled carbon for industrial use, is greatly reduced in hardness, and friction against each other will produce a large amount of fine powder, which is easy to get hands dirty. Especially activated carbon made of carbon, twisting carbon particles with your fingers, it is easy to turn into powder.