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Xue Y.-F.,Beijing Municipal Research Institute of Environmental Protection | Xue Y.-F.,Beijing Normal University | Yan J.,Beijing Municipal Research Institute of Environmental Protection | Tian H.-Z.,Beijing Normal University | And 5 more authors.
Huanjing Kexue/Environmental Science | Year: 2015

Hazardous Air Pollutants (HAPs) such as exhaust particulate matter (PM), carbon monoxide (CO), sulfur dioxide (SO2), nitrogen oxide (NOx), mercury (Hg)and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-furans (PCDD/Fs) are emitted by the process of cremation and the burning of oblation. Risks to health posed by emissions of hazardous air pollutants from crematories are emerging concerns. Through field investigation and data collection, we obtained the related activity levels and monitored the concentrations of air pollutants from typical cremators, so as to better understand the current pollutants emission levels for crematory. Using the emission factor method, we calculated the emission inventory of HAPs for crematory of Beijing in 2012 and quantified the range of uncertainty. Using atmospheric diffusion model ADMS, we evaluated the influence of crematories on the surrounding environment, and identified the characteristics of air pollution. The results showed that: for the cremators installed with flue gas purification system, the emission concentration of exhaust PM was rather low, and the CO emission concentration fluctuated greatly. However, relative high emission concentrations of PCDD/Fs were detected mainly due to insufficient combustion. Exhaust PM, CO, SO2, NOx, Hg and PCDD/Fs emitted by crematory of Beijing in 2012 were estimated at about 11.5 tons, 41.25 tons, 2.34 tons, 7.65 tons, 13.76 kg and 0.88 g, respectively; According to the results of dispersion model simulation, the concentration contributions of exhaust PM, CO, SO2, NOx, Hg, PCDD/Fs from crematories were 0.059 47 μg·m-3, 0.200 9 μg·m-3 and 0.012 6 μg·m-3, 0.036 67 μg·m-3 and 0.062 47 pg·m-3, 0.004 213 pg·m-3, respectively. ©, 2015, Science Press. All right reserved.

Xue Y.,Beijing Normal University | Xue Y.,Beijing Municipal Research Institute of Environmental Protection | Tian H.,Beijing Normal University | Yan J.,Beijing Municipal Research Institute of Environmental Protection | And 9 more authors.
Atmospheric Environment | Year: 2016

China is the most populous country in the world. The amount of death population has reached 9.65 million and 49.5% of human corpses are cremated by about 1700 crematories spread throughout the country in 2012, leading to considerable discharge of various hazardous air pollutants (HAPs) into the atmosphere and great concerns on regional air quality and health risks for surrounding residents. By using the practicable or best available emission factors, for the first time, a multiple-year emission inventory of typical hazardous air pollutants discharged from crematories in the Chinese mainland, has been established for the historical period of 1990-2012, and the future trends of HAPs emissions until 2030 are forecasted based on three scenarios analysis. Our results show that the total emissions have gradually increased to 906 t of NOX, 443 t of SO2, 2713 t of CO, 477.7 t of PM, 377 t of HCl, 36 t of H2S, 25 t of NH3, 62 t of NMVOCs, 592 kg of Hg, 48 kg of Pb, 14 kg of Cd, 53 kg of As, 40 kg of Cr, 37 kg of Cu, 51 kg of Ni, and 96 g of PCDD/Fs as TEQ (toxic equivalent quantity) by the year 2012. Under the business-as-usual (BAU) scenario, various HAPs emitted from cremators would continuously increase with an average growth rate of 3% till to 2030; whereas the emissions will peak at around 2015 and then decline gradually with varied speed under the two improved control scenarios. To mitigate the associated air pollution and health risks caused by crematories, it is of great necessary for implementing more strict emission standards, applying combustion optimization and requiring installation of best available flue gas purification system, as well as powerful supervision for sound operation of crematories. © 2015 Elsevier Ltd.

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