HR: 0830h
AN: A31D-0069    [PDF]
TI: Non-Controlled Emissi\'{o}n of VOCs from Arico's Landfill, Tenerife, Canary Islands
AU: * Dionis, S
EM:
AF: Faculty of Chemistry, Univ. de La Laguna, Tenerife, Canary Islands, Spain, La Laguna, 38206 Spain
AU: De La Rosa, D N
EM:
AF: Faculty of Chemistry, Univ. de La Laguna, Tenerife, Canary Islands, Spain, La Laguna, 38206 Spain
AU: Lima, R N
EM: nlima@iter.rcanaria.es
AF: Environmental Research Division, ITER, Tenerife, Canary Islands, Spain, Granadilla, 38611 Spain
AU: Nolasco, D
EM:
AF: Environmental Research Division, ITER, Tenerife, Canary Islands, Spain, Granadilla, 38611 Spain
AU: Salazar, J L
EM:
AF: Environmental Research Division, ITER, Tenerife, Canary Islands, Spain, Granadilla, 38611 Spain
AU: Hern\'{a}ndez, P A
EM:
AF: Environmental Research Division, ITER, Tenerife, Canary Islands, Spain, Granadilla, 38611 Spain
AU: P\'{e}rez, N M
EM:
AF: Environmental Research Division, ITER, Tenerife, Canary Islands, Spain, Granadilla, 38611 Spain
AB: Landfills are important sources of $CH_{4}$ as well as other trace gas components to the environment. A large number of organic volatile components (VOCs) are present as tracers in landfill gases, and they are considered to be carcinogenic and toxic. In order to control the emissions of these contaminants to the atmosphere, extraction systems to recover biogas are installed in landfills. However, a significant amount of these emissions could be released to the atmosphere through the surface environment in a diffuse form, also known as a non-controlled emission of landfill gases. The aim of this study is evaluate the non-controlled emission of VOCs from Arico's landfill.\\ The Arico landfill has an extension of 0.35 k$m^{2}$, and about 1,546 tons of municipal solid waste (MSW) is daily deposited. A biogas extraction system was installed at the Arico landfill between 1998 and 1999. A non-controlled VOCs emission survey of 133 sampling sites was carried out during August, 2002. Surface $CO_{2}$ efflux measurements were performed by means of a portable NDIR spectrometer and according to the accumulation chamber method. Surface $CO_{2}$ efflux ranged from 1 to 10,580 g$m^{-2}$$d^{-1}$. At each sampling site, surface landfill gas samples were collected at 40 cm deep using a metallic probe. These gas samples were analyzed within 24 hours by means of GC-MS. Non-controlled emission rate of VOCs were estimated by multiplying surface CO2 efflux times $(VOCs)_{i}$/$CO_{2}$ weight ratio at each sampling site, respectively. The spatial distributions of VOCs at the Arico's landfill showed a different distribution pattern for each volatile component and it is related to actual use of the landfill. Taking into consideration the spatial distribution of the VOCs efflux values as well as the extension of the landfill, the non-controlled emission of VOCs to the atmosphere by Arico's landfill was estimated about 2108 Kg$d^{-1}$ of which 1638 Kg$d^{-1}$ are BTEX emissions.
UR: http://www.iter.es
DE: 0345 Pollution--urban and regional (0305)
DE: 0400 Biogeosciences
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting