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《Environmental Chemistry》 2000-06
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Chang Hui Yang Shaojin Dong Jinquan Wang Shicheng(Institute of High Energy Physics, Chinese Academy of Science, Beijing, 100080)  
One five-stage sequential extraction procedure has been applied for element composition and species in coal fly ash, indoor aerosol, outdoor aerosol, and aerosol supplied by International Atomic Energy Agency (IAEA). Analyses were carried out by instrumental neutron activation analysis , and distribution proportions of elements in five phases were calculated. According to the environmental and biologic characters of elements in different species as well as their main sources, their absorbability and alterability in environment and ecosystem were evaluated , and their influences to environment were discussed. Experiment data show that elements have various distribution complexions in different phases. Among the lithosphere source elements, Sc, Al, Fe and Ti mainly enrich in indissoluble phase , rare earth elements mainly enrich in oxide phase and indissoluble phase. Indissoluble phase does not easily react after they deposited, and has little effect to environment, while oxide phase can react with other compounds. Mn mainly enrich in dissoluble phase and oxide phase, therefore has stronger environment mobile ability than Sc, Al, Fe and Ti. Distribution proportions of elements from anthropogenic sources in five phases have also some difference due to various sources. These elements have large proportion of environment mobile phases, that is, when they deposity on the earth ' s surface by dry and wet removal processes, dissoluble phase can directly enter water circulation. In proper condition, carbonate phase, oxide phase and organic phase can react with other compound in environment to enter ecosystem as water dissoluble compound, thus have strong influences to environment.
【CateGory Index】: X513
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