Standard Analysis for Buying Activated Carbon

  1. Look at the ingredients: it would be better if it was a small particle coconut shell activated carbon. Because the national standard GB/T18883-2002 air quality standard Appendix B3.1 stipulates that the test method for benzene in indoor air is the test tube sampling method: that is, the benzene in the indoor air is sampled and then taken back to the laboratory for analysis, among which the benzene sampling method It is clearly stipulated in the tube specification standard to use: “Coconut shell activated carbon: 20-40 mesh, used to install activated carbon sampling tube.” Then take it back to the laboratory, and use carbon disulfide to decompose the benzene adsorbed in the coconut shell activated carbon for experiments. room analysis.
  2. Look at the particle size: activated carbon particles should be within 0.85mm: the national air quality inspection standard stipulates that the particles using activated carbon should be 20-40 mesh, which means that the maximum particle size should not exceed 0.85mm. Generally speaking, the smaller the activated carbon particles, the larger the specific surface area, and the better the adsorption effect, but the smaller the particles, the more dust, the loss will increase, and the cost will increase. Therefore, some manufacturers use large granular activated carbon with low iodine adsorption value to avoid waste caused by dust treatment and increase production costs.
  3. Look at the amount of dust: the first principle of using activated carbon is to ensure safety, environmental protection, and no harm to the human body. Therefore, in the production of activated carbon, post-processing must be carried out, that is, the crushed coconut shell activated carbon must be dedusted, otherwise too much dust will diffuse into the air, causing indoor dust particles to exceed the standard, resulting in secondary pollution. At present, some low-quality activated carbons on the market do not perform dust treatment on activated carbon in order to reduce costs. Take the activated carbon bag in your hand and pat it a few times, and you will immediately see the activated carbon dust seeping out and dirtying your palms.
  4. Check whether the packaging is sealed: One of the characteristics of household activated carbon is that it will start to work once it comes into contact with the air. Therefore, the regular outer packaging of activated carbon must be sealed. If it is a carton package, the outer packaging of the carton should generally be Heat shrinkable film is available. If the sealed package is damaged, it will definitely affect the use effect.
  5. Look at the size of the carbon bag: Professional household activated carbon production will be divided into multiple activated carbon packets, generally the most common is 50 grams of activated carbon packets, which can increase the contact area between activated carbon and air and improve the use effect; at the same time, the use is also more flexible, It is convenient and can be directly placed in cabinets, drawers and other cabinets to continuously purify the continuously released harmful gases, and control the diffusion of pollutants into the air to pollute the indoor environment. If we think about it carefully, we know that if one package is made of 500g, compared with 10 packages, the latter will definitely have a larger area of ​​air contacted, and of course the adsorption effect will be better.
  6. Look at the inspection report: household activated carbon belongs to the category of indoor environmental protection products. Before listing, it should generally be inspected by a professional environmental protection product quality inspection agency according to the requirements of the national light industry standard “Determination of Purification Effect of Indoor Air Purification Products” to determine its purification effect. , to protect the rights and interests of consumers. When purchasing activated carbon products, consumers should pay attention to requesting an inspection report to check whether it has passed the “purification effect test”.

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Further reading

Drinking water treatment activated carbon (2)

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