Mercury speciation in fluorescent lamps by thermal release analysis.
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.
Raposo
Cláudio
C
Nuclear Technology Development Center-CDTN/CNEN, Cidade Universitária, 30.123-970 Belo Horizonte, Minas Gerais, Brazil. raposoc@urano.cdnt.br
Windmöller
Cláudia Carvalhinho
CC
Durão
Walter Alves
WA
D006256:Hazardous Waste; D008029:Lighting / Q000295:instrumentation*; D008422:Materials Testing; D008628:Mercury / Q000032:analysis / Q000737:chemistry*; D012037:Refuse Disposal; D013054:Spectrophotometry, Atomic; D013696:Temperature; D014961:X-Ray Diffraction
D006256:Hazardous Waste; D008628:Mercury