A Study on the Flow and Management of Mercury-Containing Lamps in High Tech. Industry
| Autor: | Huei-Wen Kong, 孔慧雯 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 Mercury is classified as a dangerous chemical in the world, but still is an important material of industrial products. The high tech. industry of domestic is growing vigorously, to manufacture the liquid crystal display（LCD）, semiconductor and wafer use mercury-containing lamps. When the mercury-containing lamps are discarded, all the mercury gets into the environment, which is harmful to human beings and other organisms. Therefore, it is an important issue to investigate and evaluate the fate of mercury. This study investigated the fate of high mercury-contained lamps, such as cold cathode fluorescent lamps (CCFLs), ultraviolet lamps (UV lamps), and super high pressure mercury lamps (SHPs), in high tech. industries by using material flow analysis (MFA) method. Several organizations related to mercury-containing lamps, such as Taiwan Environmental Protection Administration, Taiwan External Trade Development Council, the light sources manufacturers, mercury-containing lamps importers, and high tech. industrial users with waste mercury-containing lamps treatment facilities were interviewed in this study. According to this survey, the total mercury contained in CCFLs, UV lamps, and SHPs produced by domestic industries and imported from other countries was 1,387 kg in 2004. Regarding the amount of mercury contained in lamps, 96 kg was exported, 12 kg was the waste from defective CCFLs, and 1,279 kg of mercury contained was used in the high tech. industries. In addition, 181 kg mercury of used by high tech. industries was well treated in the industrial waste treatment system. It was calculated that 80, 92, and 9 kg mercury was used for domestic treatment, offshore treatment and emission in air, which correspond to 44%, 51% and 5% of the 181 kg of wasted mercury, respectively. Unfortunately, 97 kg of waste mercury was not suitably treated. Generally, the CCFLs are components of LCD（computer-monitor products and LCD TV）back light module. According to the estimation, it has been revealed that 304 kg mercury contained in CCFLs used as components of LCD products, were for domestic sale. When the LCD products were discarded, the danger and recovery of the toxicants and valuable metals, are an important challenge. In addition, by the technology breakthrough to develop the mercury-free lamp, it is a major trend to lower the mercury loading to prevent the hazard in the future. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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