| Highly elevated emission of mercury vapor due to the spontaneous combustion of refuse in a landfill | |
Wei Zhu; Jonas Sommar; Zhonggen Li; Xinbin Feng ; Che-Jen Lin; Guanghui Li
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| 2013 | |
| Source Publication | Atmospheric Environment
 |
| Volume | 79Issue:2Pages:540-545 |
| Abstract | Refuse disposal (e.g., landfilling and incineration) have been recognized as a significant anthropogenic source of mercury (Hg) emission globally. However, in-situ measurements of Hg emission from landfill or refuse dumping sites where fugitive spontaneous combustion occurs have not been reported. Gaseous elemental mercury (Hg0) concentration and emission flux were observed near spontaneous combustions of refuse at a landfill site in southwestern China. Ambient Hg0 concentrations above the refuse surface ranged from 42.7 ± 20.0 to 396.4 ± 114.2 ng m−3, up to 10 times enhancement due to the spontaneous burning. Using a box model with Hg0 data obtained from 2004 to 2013, we estimated that the Hg0 emission from refuse was amplified by 8–40 times due to spontaneous combustion. A micrometeorological flux measurement system based on relaxed eddy accumulation was configured downwind of the combustion sites to quantify the Hg0 emission. Extremely large turbulent deposition fluxes (up to −128.6 μg m−2 h−1, 20 min average) were detected during periods of high Hg0 concentration events over the measurement footprint. The effect of temperature, moisture and light on the air–surface exchange of Hg0 exchange was found to be masked by the overwhelming deposition of Hg0 from the enriched air from the refuse combustion plumes. This research reveals that mercury emission from the landfill refuse can be boosted by fugitive spontaneous combustion of refuse. The emission represents an anthropogenic source that has been overlooked in Hg inventory estimates. |
| Keyword | Mercury Flux Refuse Spontaneous Combustion Relaxed Eddy Accumulation Box Modeling |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5021 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 环境地球化学国家重点实验室 |
| Recommended Citation GB/T 7714 | Wei Zhu,Jonas Sommar,Zhonggen Li,et al. Highly elevated emission of mercury vapor due to the spontaneous combustion of refuse in a landfill[J]. Atmospheric Environment,2013,79(2):540-545. |
| APA | Wei Zhu,Jonas Sommar,Zhonggen Li,Xinbin Feng,Che-Jen Lin,&Guanghui Li.(2013).Highly elevated emission of mercury vapor due to the spontaneous combustion of refuse in a landfill.Atmospheric Environment,79(2),540-545. |
| MLA | Wei Zhu,et al."Highly elevated emission of mercury vapor due to the spontaneous combustion of refuse in a landfill".Atmospheric Environment 79.2(2013):540-545. |
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