A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mercury enrichment and its effects on atmospheric emissions in cement plants of China
Abstract The cement industry is one of the most significant anthropogenic sources of atmospheric mercury emissions worldwide. In this study of three typical Chinese cement plants, mercury in kiln flue gas was sampled using the Ontario Hydro Method (OHM), and solid samples were analyzed. Particulate matter recycling, preheating of raw materials, and the use of coal and flue gas desulfurization derived gypsum contributed to emissions of Hg in the air and to accumulation in cement. Over 90% of the mercury input was emitted into the atmosphere. Mercury emission factors were 0.044–0.072 g/t clinker for the test plants. The major species emitted into the atmosphere from cement plants is oxidized mercury, accounting for 61%–91% of the total mercury in flue gas. The results of this study help improve the accuracy of the mercury emission inventory in China and provide useful information for developing mercury controls.
Highlights Mercury enrichment caused by particle recycling in cement plants was evaluated. Over 90% of mercury input is emitted into atmosphere due to particle recycling. Emission factors range from 0.044 to 0.072 g Hg/t clinker. Mercury from cement manufacturing process is mainly emitted in oxidized form.
Mercury enrichment and its effects on atmospheric emissions in cement plants of China
Abstract The cement industry is one of the most significant anthropogenic sources of atmospheric mercury emissions worldwide. In this study of three typical Chinese cement plants, mercury in kiln flue gas was sampled using the Ontario Hydro Method (OHM), and solid samples were analyzed. Particulate matter recycling, preheating of raw materials, and the use of coal and flue gas desulfurization derived gypsum contributed to emissions of Hg in the air and to accumulation in cement. Over 90% of the mercury input was emitted into the atmosphere. Mercury emission factors were 0.044–0.072 g/t clinker for the test plants. The major species emitted into the atmosphere from cement plants is oxidized mercury, accounting for 61%–91% of the total mercury in flue gas. The results of this study help improve the accuracy of the mercury emission inventory in China and provide useful information for developing mercury controls.
Highlights Mercury enrichment caused by particle recycling in cement plants was evaluated. Over 90% of mercury input is emitted into atmosphere due to particle recycling. Emission factors range from 0.044 to 0.072 g Hg/t clinker. Mercury from cement manufacturing process is mainly emitted in oxidized form.
Mercury enrichment and its effects on atmospheric emissions in cement plants of China
Wang, Fengyang (author) / Wang, Shuxiao (author) / Zhang, Lei (author) / Yang, Hai (author) / Wu, Qingru (author) / Hao, Jiming (author)
Atmospheric Environment ; 92 ; 421-428
2014-04-16
8 pages
Article (Journal)
Electronic Resource
English
Control strategies of atmospheric mercury emissions from coal-fired power plants in China
| Taylor & Francis Verlag | 2012
The problem of gaseous emissions of mercury in cement plants
| British Library Online Contents | 1992
A review of atmospheric mercury emissions, pollution and control in China
| Springer Verlag | 2014
Continuous mercury monitoring in cement plants
| British Library Online Contents | 2014
Mercury enrichment in Brassica napus in response to elevated atmospheric mercury concentrations
| Springer Verlag | 2016