title: Mercury speciation in fluorescent lamps by thermal release analysis.
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.
authors: Nuclear Technology Development Center-CDTN/CNEN, Cidade Universitária, 30.123-970 Belo Horizonte, Minas Gerais, Brazil. raposoc@urano.cdnt.br
authors: Cláudio
authors: C
authors: Raposo
authors: Cláudia Carvalhinho
authors: CC
authors: Windmöller
authors: Walter Alves
authors: WA
authors: Durão
mesh_terms: 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
chemical_list: D006256:Hazardous Waste; D008628:Mercury