Under what conditions does formaldehyde decompose into CO2 and H2O? O3 can decompose formaldehyde. Are there any other substances that can decompose formaldehyde?

Formaldehyde can be oxidized and decomposed into water and carbon dioxide by saprophytic bacteria in the water environment. In addition to ozone, formaldehyde can also be decomposed by photocatalysts, biological enzymes, amino acids, etc.

1. Decomposition of formaldehyde: The main source of formaldehyde pollution in the environment is wastewater and waste gas discharged from industries such as organic synthesis, chemical industry, synthetic fibers, dyes, wood processing, and paint making. The degradation of certain organic compounds in the environment also produces formaldehyde. For example, the degradation products of vinyl chloride also contain formaldehyde.

Because formaldehyde has strong reducing properties, it can be oxidized to formic acid in the presence of oxidizing substances. For example, formaldehyde entering the water environment can be oxidized and decomposed by saprophytic bacteria, thus consuming dissolved oxygen in the water. The further decomposition products of formic acid are carbon dioxide and water. Formaldehyde entering the environment is gradually diluted, oxidized and degraded under the simultaneous effects of physics, chemistry and biology.

2. Formaldehyde removal by base acids uses the principle that formaldehyde can be combined with the basic structure of human protein (amino acids) to improve the existing activated carbon adsorption formaldehyde removal technology. The micropores inside the activated carbon are filled with Amino acid substances use the amino groups in amino acids to react with formaldehyde to decompose formaldehyde into hydroxymethyl derivatives and water and other substances that are harmless to the human body, so as to achieve the purpose of safely removing formaldehyde.

3. Enzyme formaldehyde removal: non-toxic and harmless, low dosage, biodegradable wastewater, pollution-free and conducive to ecological and environmental protection. At the same time, biological enzymes are also used in the field of indoor decoration pollution control to eliminate odor, formaldehyde and other pollution caused by indoor decoration through swallowing and decomposition.

4. Photocatalyst is a general term for optical semiconductor materials with photocatalytic functions represented by nanoscale titanium dioxide. It is one of the safest materials for controlling indoor environmental pollution in the world. In a light environment, the dielectric material generates positive and negative electron charges and decomposes the air into hydroxide ions, thereby producing decomposition and reduction. Its most representative material is nanoscale titanium dioxide.

Extended information:

Formaldehyde is mainly used in fiber products as dyeing auxiliaries and resin finishing agents to improve anti-wrinkle and anti-shrink effects. Formaldehyde can make textiles bright and bright in color, maintain the durability of printing and dyeing, and make cotton fabrics wrinkle-proof, shrink-proof, and flame-retardant. Therefore, formaldehyde is widely used in the textile industry.

Colorful and printed clothing generally contain higher levels of formaldehyde, while plain clothing and children's clothing without printed patterns have lower levels of formaldehyde. These formaldehyde-containing clothes will release formaldehyde during storage and wearing. In particular, the formaldehyde released by children's clothing and underwear is the most harmful.

Formaldehyde in Food

Formaldehyde is an additive prohibited from use in food expressly stipulated by the state. It must not be detected in food, but it has been detected in many foods to varying degrees. Presence of formaldehyde. Found in water-cooked foods and pasta, mushroom or soy products. Formaldehyde can whiten and change color, so formaldehyde is often used by unscrupulous vendors for fumigation or directly added to pasta, mushrooms or soy products. When unscrupulous vendors use "white blocks" to fumigate related foods to whiten them, formaldehyde can also remain in the food. formaldehyde.

Baidu Encyclopedia - Amino Acid Removal of Formaldehyde

Baidu Encyclopedia - Biological Enzyme Removal of Formaldehyde

Baidu Encyclopedia - Photocatalyst Removal of Formaldehyde

Baidu Encyclopedia - Formaldehyde