Dynamics in Diffusive Emissions of Dissolved Gases from Groundwater Induced by Fluctuated Ground Surface Temperature

Ma, Enze1,2; Liang, Xiuyu1,2; Zhang, Jiangwei1,2; Zhang, You-Kuan1

2022-02-15

10.1021/acs.est.1c06009

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

During the lateral transport with subsurface flow, amounts of manufactured volatile organic chemicals and gases dissolved in groundwater are emitted into the atmosphere via upward diffusion through soils. Quantifying gas emissions is important for assessing environmental risk associated with these constituents (e.g., air pollution and global warming). It is widely recognized that the temperature would affect gas spreading in soils, which in turn regulates the gas emission from groundwater. However, the upward diffusive gas emission induced by the fluctuated ground surface temperature (GST) remains unexplored. A coupled heat transfer and gas transport model is developed to investigate emissions of tetrachloroethylene (PCE) and N2O, a typical manufactured volatile organic chemical and a natural gas, from groundwater with seasonally fluctuating GSTs. The results indicate that both PCE and N2O emissions vary significantly from month to month. Moreover, fluctuations of emissions lag obviously behind the fluctuation of GST due to the damping effects of both capillary fringe and soil sorption. The proposed model agrees with the observed data from a monolith lysimeter experiment well. The model is also applied to the estimations of N2O emissions from 12 aquifers in Walloon Region, Belgium. The estimated N2O emission is 12.6 mu g N/m(2)/d that falls in the estimated range (9.0-21.5 mu g N/m(2)/d) using the IPCC emission factor approach that commonly accounts for the N2O emission of groundwater discharge to surface water only. It suggests that the upward diffusion is non-negligible for estimations of N2O emission from groundwater.

tetrachloroethylene nitrous oxide ground surface temperature emission from groundwater

SCI ; EI

英语

NI论文

第一 ; 通讯

National Natural Science Foundation of China[41977165,42172275]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000763099700027

AMER CHEMICAL SOC

20220711632979

Aquifers ; Atmospheric temperature ; Gas emissions ; Global warming ; Groundwater pollution ; Groundwater resources ; Heat transfer ; Hydrogeology ; Organic chemicals ; Risk assessment ; Soils ; Surface properties ; Surface waters ; Volatile organic compounds

Atmospheric Properties:443.1 ; Surface Water:444.1 ; Groundwater:444.2 ; Water Pollution Sources:453.1 ; Geology:481.1 ; Soils and Soil Mechanics:483.1 ; Heat Transfer:641.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Accidents and Accident Prevention:914.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

ENVIRONMENT/ECOLOGY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Guangdong, Peoples R China

Ma, Enze,Liang, Xiuyu,Zhang, Jiangwei,et al. Dynamics in Diffusive Emissions of Dissolved Gases from Groundwater Induced by Fluctuated Ground Surface Temperature[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(4):2355-2365.

Ma, Enze,Liang, Xiuyu,Zhang, Jiangwei,&Zhang, You-Kuan.(2022).Dynamics in Diffusive Emissions of Dissolved Gases from Groundwater Induced by Fluctuated Ground Surface Temperature.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(4),2355-2365.

Ma, Enze,et al."Dynamics in Diffusive Emissions of Dissolved Gases from Groundwater Induced by Fluctuated Ground Surface Temperature".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.4(2022):2355-2365.