What is the classification of activated carbon by formaldehyde activated carbon

What is formaldehyde activated carbon ? The principle of activated carbon purification is to rely on its pore structure and surface area developed by itself, which can be greatly exposed to the surrounding air and passively adsorb some pollutants into its own pores. Therefore, the larger the surface of activated carbon, the larger the pore size structure. The more developed the adsorption capacity is.

Basic overview

Formaldehyde is a highly volatile organic compound with a high degree of contamination and is one of the major pollutants in indoor air. In recent years, formaldehyde in public places in China is one of the items that must be tested. As we all know, formaldehyde has a great impact on human health. It has a strong irritant effect on human mucous membranes and skin. When inhaled with high concentrations, severe respiratory tract edema and edema can occur, causing eye irritation and headache. Low concentrations of inhalation can lead to persistent headaches, weakness, insomnia, etc. Long-term exposure can lead to dermatitis, lung, abnormal liver function, abnormal immune function, central nervous system affected, and can also damage intracellular genetic material. It is a suspected carcinogen.

Activated carbon classification:

Activated carbon can be divided into: wood activated carbon, fruit shell activated carbon, animal bone/blood activated carbon, mineral raw material activated carbon, synthetic resin activated carbon, rubber/plastic activated carbon, regenerated activated carbon, etc.; commonly used activated carbon classification:

1, according to the source of raw materials: Shell charcoal (coconut shell, apricot kernel, walnut shell, olive shell, etc.) coal charcoal, wood charcoal and so on. Among them: coconut shell material (especially Southeast Asia coconut shell) with high strength, good adsorption performance, low ash, long life cycle is recognized as the best activated carbon raw materials at home and abroad, which is characterized by high cost.

—— Activated carbon made of coal is usually activated by steam or carbon dioxide gas. The shape of the product is mainly granular. Its pore size distribution is mostly microporous, and it is more suitable for liquid phase adsorption and smaller molecular weight and molecular diameter in gas phase. The substance. Its advantage is that the production cost is relatively low;

Activated carbon produced from sawdust as a raw material is usually chemically activated. The shape of the product is mainly powder. Its pore size distribution can be controlled by adjusting the ratio of chemical activators. It is flexible and can produce pore size distributions. Microporous products can also produce products with a large proportion of pores (transition holes) in the pore size distribution, and are suitable for adsorbing substances with larger molecular weights and molecular diameters in the liquid phase.

—— Activated carbon made from shells is usually activated by steam and carbon dioxide gas. The shape of the product is mainly granular. Due to the special material, the pore size distribution is between the above two types of activated carbon. Excellent, so its application is more extensive.

2. Classification according to manufacturing methods: gas activated carbon (or physical activated carbon), chemical activated carbon (or chemical activated carbon), and chemical-physical activated carbon.

3, according to appearance shape classification: amorphous granular activated carbon (or broken activated carbon), shaped activated carbon (or shaped activated carbon) and powdered activated carbon.

4. According to the purpose of activated carbon: sugar activated carbon, wood vehicle activated carbon, air purification activated carbon, water purification activated carbon, oil and gas recovery of activated carbon, pharmaceutical activated carbon, super capacitor activated carbon, catalyst carrier activated carbon and so on.

Poisoning symptoms

Exposure to formaldehyde in the air and many other similar indoor air pollution can cause eye, nose and throat tingling. Respiratory symptoms may also occur, including sore throat or strep throat. There may also be symptoms similar to asthma. Formaldehyde air pollution can cause babies to have difficulty in breathing, resulting in crying throughout the night. After the eye may be stimulated, it may have a runny or nosebleed. Other symptoms may also include rashes, drowsiness, dizziness, poor memory, depression, nausea, diarrhea, earache and ear infections, allergies, and numbness of limbs or arms.

Symptoms caused by formaldehyde may be similar to those caused by the common cold, flu, or other indoor air pollutants. Pay more attention. If symptoms go away when you leave home or work, but the symptoms reappear when you return, this indicates that there may be contaminants in the indoor air at this place, such as formaldehyde. Check the surroundings. Have you changed your seat, moving house or changing your workplace recently? Recently, there have been no modifications or new installations of cabinets, furniture, curtains, or rugs. Your symptoms may have originated from the toxic gases that are escaping from these new items.

Information on formaldehyde activated carbon is introduced here for everyone. I hope this article will be helpful to everyone. If you still have something you don't understand, you can leave a message to Xiaobian at the bottom. We will answer your questions as soon as possible.

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