Mass flow, enrichment and potential environmental impacts of mercury in a preheater-precalciner cement plant using multiple mining and industrial wastes

Li, Zhonggen; Huang, Yiming; Liu, Jinling; Sun, Guangyi; Wang, Qingfeng; Xiao, Hanxi; Huang, Mingqin

doi:10.1016/j.jenvman.2022.114819

Cited by 3 publications

(1 citation statement)

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“…Around 2010, CCP began to take the lead in Hg emission among all sectors in China. − Dust recycling in the precalciner process in cement plants could cause Hg accumulation in the kiln system and significantly limit the Hg removal efficiencies of PM control devices. ,, Cai et al estimated that Hg emissions from CCPs in China increased from 80 to 113 t from 2007 to 2015 based on the mass balance method and plant-level input–output data. Coal is used as fuel in cement production, but is categorized into the industrial coal combustion sector in China Energy Statistical Yearbooks which were the most commonly used sources for activity data of coal consumption. , Therefore, previous studies ,, tended to exclude the part of Hg emissions from coal use in cement production to avoid double counting.…”

Section: Introductionmentioning

confidence: 99%

Improved Anthropogenic Mercury Emission Inventories for China from 1980 to 2020: Toward More Accurate Effectiveness Evaluation for the Minamata Convention

Zhang,

Cao

et al. 2023

Environ. Sci. Technol.

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Anthropogenic mercury (Hg) emission inventories are crucial for the effectiveness evaluation of the Minamata Convention on Mercury. In this study, we developed an integrated Dynamic Inventory for Mercury Emission (DIME) model and improved the accuracy of emission estimates for primary sources in China. Long-term historical speciated Hg emission inventories for China were established. The total Hg emissions increased from 217.0 t in 1980 to 357.8 t in 2020 with a peak value of 506.6 t in 2010. Three stages with distinct leading drivers were identified. At Stage 1 (1980−1997), Hg emissions doubled with the rapid growth of economy; the driver was offset by the increase of dust and SO 2 control measures at Stage 2 (1997−2010) except for cement production; and co-benefits from strict control measures induced the decoupling of Hg emissions from the economy at Stage 3 (2010−2020). The ultralow emission (ULE) retrofits in key industries had pronounced Hg removal efficiencies. Large emission reduction potential still exists in the cement industry. The improved emission estimation methods for key sectors, the consistency in methodology for historical Hg emission inventories, and the more accurate spatial distribution of speciated Hg emissions in this study provide a practical toolkit for the effectiveness evaluation of the Minamata Convention.

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