Mercury speciation in fluorescent lamps by thermal release analysis |
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Authors: | Raposo Cláudio Windmöller Cláudia Carvalhinho Durão Walter Alves |
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Affiliation: | Nuclear Technology Development Center-CDTN/CNEN, Cidade Universitária, 30.123-970 Belo Horizonte, Minas Gerais, Brazil. raposoc@urano.cdnt.br |
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Abstract: | In this work, mercury speciation in phosphorus powder matrices and soda lime glass waste from new and spent fluorescent lamp wastes has been studied by thermo-desorption/atomic absorption spectrometry (TDAAS), X-ray diffraction (XRD), cold vapor-atomic absorption (CV-AAS) and atomic emission spectrometry/inductively coupled plasma (ICP/AES). TDAAS results show the presence of oxidized forms of mercury, i.e., Hg(1+) and Hg(2+), especially in wastes with high mercury concentration. Such forms are mobile, and therefore represent a potential hazard waste material. Glass TD profiles of spent fluorescent lamps suggested the presence of mercury strongly linked to the matrix, which desorbs only at high temperatures. |
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