tailieunhanh - Indoor Environmental Quality - Chapter 2

Chất gây ô nhiễm vô cơ: amiăng / radon / dẫn Các chất vô cơ như amiăng, radon, và chì là chất gây ô nhiễm chính trong nhà. Mặc dù rất khác nhau, họ có trong bản chất phổ biến khoáng sản hoặc vô cơ. Tiếp xúc có thể gây ra nguy cơ sức khỏe đáng kể. Chì là quan tâm bởi vì nó là một chất gây ô nhiễm bề mặt chung của các không gian trong nhà, và tiếp xúc với bụi xây dựng chì bị ô nhiễm là nguyên nhân chính của nồng độ trong máu cao ở. | chapter two Inorganic contaminants asbestos radon lead Inorganic substances such as asbestos radon and lead are major indoor contaminants. Though very different they have in common a mineral or inorganic nature. Exposures may pose significant health risks. Lead is of concern because it is a common surface contaminant of indoor spaces and contact with lead-contaminated building dust is the primary cause of elevated blood levels in children under the age of six. I. Asbestos Potential airborne asbestos fiber exposures in building environments and associated public health risks were brought to the nation s United States attention in the late 1970s by both public interest groups and governmental authorities. This attention was a logical extension of exposure concerns associated with the promulgation of a national emission standard for asbestos as a hazardous pollutant NESHAP by the United States Environmental Protection Agency USEPA in 1973. The asbestos NESHAP banned application of spray-applied asbestos-containing fireproofing in building construction there was a subsequent ban of other friable asbestos-containing building products in 1978. Under NESHAP provisions friable crushed by hand asbestos-containing building materials ACBM must be removed prior to building demolition or renovation. Such removal must be conducted in accordance with Occupational Safety and Health Administration OSHA requirements to protect construction workers removing asbestos as well as building occupants. As a consequence of these regulatory actions asbestos in buildings particularly in schools became a major indoor air quality IAQ and public health concern. 2001 by CRC Press LLC The ban on friable asbestos-containing materials used in building construction and requirements for removal prior to demolition or renovation were intended to minimize exposure of individuals in the general community to contaminated ambient outdoor air. Potential exposures to building occupants from fibers released .

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