室内有害气体的来源与危害（The source and harm of indoor harmful gas）.docVIP

室内有害气体的来源与危害（The source and harm of indoor harmful gas） The types, sources and hazards of the main substances in indoor environment The environmental quality of indoor environmental pollution is influenced and polluted in many aspects, which can be divided into three categories. A: physical pollution, including noise, radiation, electromagnetic radiation and radioactive pollution, mainly comes from outdoor and indoor electrical equipment. B: chemical pollution, building decoration materials and furniture products in the release of volatile compounds of dozens of, with radon, formaldehyde, benzene, ammonia and so on four big the harm of indoor harmful gas is particularly acute. C: biological pollution, mainly mites, termites and other bacteria, mainly from carpets, blankets, wood products and structural subjects. The main source and harm caused by the improper decoration of formaldehyde, ammonia, radon gas, benzene, radioactive substances are the main sources of indoor environmental pollutants. A: the origin and hazard of radon gas. Radon gas is a kind of radioactive material which is precipitated from granite, cement, slag, block and gypsum building materials. Mainly comes from the inorganic material is given priority to with natural stone (granite, marble, gypsum, cement, sand, etc.) and the comprehensive utilization of slag and industrial waste residue after products (coal gangue brick, fly ash products). Radon is easy to enter into the lungs with human breath, harming the human respiratory organs and causing serious lung cancer. The radiation in natural stone can damage the human hematopoietic function, causing the occurrence of leukemia. B: source and hazard of formaldehyde. Formaldehyde is an organic compound, colorless and easy to dissolve, with strong pungent smell. The material mainly comes from interior decorative plywood, joinery board, medium density fiberboard and particleboard, and wood furniture made from plywood and inferior wood glue. Other kinds of