Activated carbon is easy to be "clogged" by water, it is recommended to "revive" it once every 5 days. The adsorption properties of activated carbon are due to its developed pore structure. "As we see the sponge, in the same weight conditions, the sponge can absorb more water than other objects, the reason is that it has a developed pore structure." Lv Changfu said that although the pore structure of activated carbon cannot be seen with the naked eye, the developed degree of the pores is unimaginable. Lv Changfu introduced that the specific surface area of ordinary activated carbon is 500 to 1700 square metres per gram. If you take 1 gram of activated carbon with a specific surface area of 1,100 square metres/gram, all the pore walls inside will be expanded into a plane, and the area will reach 1,100 square metres. This means that such activated carbon as long as the size of 1 yuan coin (weighing about 3g), the internal adsorption area is as large as a standard football field. Translated with DeepL.com (free version)

After the use of waste activated carbon, after drying, regeneration, activation, cooling, sieving, packaging and a series of high-temperature thermal regeneration process, "transformation" for regeneration of activated carbon products, opened a recycling journey ...... This is the reporter in Zhejiang Ningbo Haijing Environmental Protection Technology Co. Recently, Ningbo City, the first activated carbon regeneration centre in Ningbo Haijing Environmental Protection Technology Co., Ltd. formally put into operation, the first production line can handle 20,000 tons of waste activated carbon per year. Activated carbon is an important material for absorbing organic waste gas. Previously, small and medium-sized enterprises generally had problems such as non-standardised design of activated carbon adsorption facilities, non-compliance with the quality and filling amount of activated carbon, and untimely replacement of activated carbon. In order to improve the management level of regional VOCs (volatile organic compounds), in recent years, Beilun has actively constructed a "government-led, market-operated, digital supervision" activated carbon full-process supervision and service system, promoted the upgrading of activated carbon management facilities in small and medium-sized enterprises, and built an activated carbon supervision and service platform covering the governmental end, the enterprise end, and the collection and transportation end, by means of digital means. Through digital means, it has built a regulatory service platform for activated carbon that covers the governmental end, the enterprise end and the receiving and transporting end - "Carbon Xiaobao". So far, more than 400 enterprises in Beilun have been included in the regulatory service platform. The use of activated carbon by enterprises has been standardised, and the air quality has become better, but how to dispose of the waste carbon? In this regard, Beilun to further explore the activated carbon "dispersed adsorption - centralised regeneration" governance, activated carbon regeneration centre came into being, which is also an important part of Beilun to build the whole process of activated carbon regulatory service system. "The centre was built and put into operation, changed the past waste charcoal 'a burned' crude disposal mode, to resourceful way to achieve the reuse, fill the blank in this field in Ningbo." Ningbo Eco-environmental Bureau Beilun Branch of the relevant responsible person said, before, enterprises use disposable activated carbon, you need to pay the purchase cost and disposal costs, and now the use of regenerative activated carbon, the cost can be reduced by about one-third, which will effectively enhance the economic benefits of enterprises. At present, more than 30 enterprises have signed the activated carbon collection and disposal contract, the first batch of 16 tonnes of waste carbon has been completed replacement.

1. Density observation: Density is an important indicator for judging the quality of activated carbon. High-quality activated carbon usually has a large volume, because its production process will create as many pore structures as possible to increase its adsorption function. Therefore, under the same weight, the volume of high-quality activated carbon will usually be larger, and it will feel relatively light. 2. Bubble test: Put the activated carbon into water and observe the bubbles it produces. Due to the soaking effect of water, the water will gradually enter the pore structure of the activated carbon and expel the air therein, thus producing tiny bubbles. The more intense the bubbles are and the longer they last, the better the adsorption performance of the activated carbon. 3. Production company: When buying activated carbon, you should choose a company that specialises in the production of activated carbon. These companies usually have stricter quality control and production standards, which can guarantee the quality and reliability of the product. 4. Particle size: According to national standards, the particle size of activated carbon should be between 20-40 mesh, usually around 0.5-1.5mm. The adsorption performance of activated carbon with too large particles will be affected, so we should try to choose products with fine particles. 5. Adsorption value test: The adsorption value of activated carbon is one of the important parameters for evaluating its adsorption performance. Consumers can check the product labels or ask manufacturers for adsorption value data to understand its adsorption capacity. 6. Three-party test: You can take a small amount of samples and send them to a professional laboratory to test the indicators. The number of activated carbon has its own laboratory testing, can be free to test the iodine value, moisture, ash and other indicators.