期刊
JOURNAL OF SYNCHROTRON RADIATION
卷 16, 期 -, 页码 528-532出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S0909049509020032
关键词
MSWI; secondary fly ashes; chemical form; XAS; zinc chloride
资金
- National Outstanding Youth Fund [10125523]
- Knowledge Innovation Program of the Chinese Academy of Sciences [KJCX2-SW-N11]
- National Science Foundation of China (NSFC) [20577047]
- National Key Technologies R&D Program of China [2006 BAC02A19]
The evaporation aerosols produced during the vitrification process of municipal solid waste incinerators (MSWI) fly ash represent a potential environmental risk owing to their high content of heavy metals. In this research, high-temperature heating processes were carried out on fly ashes collected from bag houses in a Chinese MSWI plant and the secondary fly ashes (SFA) were separately collected at three high temperatures (1273 K, 1423 K and 1523 K) below the melting range. Elemental analysis showed that high contents of both zinc and chlorine were present in these SFA samples and, according to the standard of the heavy metals industrial grade of ore, SFAs can be re-used as metallurgical raw materials or rich ore. Moreover, as shown by XAS analysis and for different high temperatures, zinc environments in the three SFA samples were characterized by the same local structure of the zinc chloride. As a consequence, a zinc recycling procedure can be easily designed based on the configuration information. (C) 2009 International Union of Crystallography Printed in Singapore - all rights reserved
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