Gongxin Chen

East China University of Technology

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Zhanxue Sun

Shandong Jiaotong University

Jinhui Liu

Qingdao University of Science and Technology

Bai Gao

Jilin Agricultural University

Yan-he GUAN

East China University of Technology

Yang Zhen

Universidad Internacional

Guanchai Wang

Weimin Zhang

Guangdong Academy of Sciences

Chenglong Li

Jilin University

Yanlin Zhang

Nanjing University of Information Science and Technology

Jiale Li

Anhui University

Cooperative Institutions

East China University of Technology

East China University of Science and Technology

North China Institute of Science and Technology

Chinese Academy of Sciences

Chinese Academy of Geological Sciences

Tongji University

Beijing Institute of Technology

Wuhan University of Technology

University of Chinese Academy of Sciences

State Key Laboratory of Pollution Control and Resource Reuse

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The isotopic and chemical characteristics of groundwater from Shihongtan uranium deposit and its surrounding area

Geochimica et Cosmochimica Acta Supplement (2009)

Gongxin Chen Zhanxue Sun Guanchai Wang Jinhui Liu

Uranium ore

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Citations (1)

Hydrogeochemical characteristics of the sandstone-hosted uranium mineralization in northern Ordos Basin, China

Ore Geology Reviews (2020)

Gongxin Chen Zhanxue Sun Nie Fengjun Chenglong Li Yang Zhen

10.1016/j.oregeorev.2020.103769

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Citations (17)

Modeling the transportation of pollutants in shallow groundwater in the landfill site near a medium city

Shuiwen dizhi gongcheng dizhi (2008)

Gongxin Chen

Based on the results of field investigation and analyses of the water samples near an urban landfill site,the characteristics of groundwater pollution are discussed in this paper.A numerical model is built for the simulation of groundwater migration of pollutants.The fitting shows that the mathematical model is reasonable.By using the model to forecast the migration of COD_ cr and Cl,we get the results of those kinds of pollutants in the area.

Groundwater Pollution

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Occurrence and Distribution of Uranium in a Hydrological Cycle around a Uranium Mill Tailings Pond, Southern China

International Journal of Environmental Research and Public Health (2020)

Wenjie Ma Bai Gao Yadan Guo Zhanxue Sun Yanhong Zhang

Uranium (U) mining activities, which lead to contamination in soils and waters (i.e., leachate from U mill tailings), cause serious environmental problems. However, limited research works have been conducted on U pollution associated with a whole soil-water system. In this study, a total of 110 samples including 96 solid and 14 water samples were collected to investigate the characteristics of U distribution in a natural soil-water system near a U mining tailings pond. Results showed that U concentrations ranged from 0.09 ± 0.02 mg/kg to 2.56 × 104± 23 mg/kg in solid samples, and varied greatly in different locations. For tailings sand samples, the highest U concentration (2.56× 104 ± 23 mg/kg) occurred at the depth of 80 cm underground, whereas, for paddy soil samples, the highest U concentration (5.22 ± 0.04 mg/kg) was found at surface layers. Geo-accumulation index and potential ecological hazard index were calculated to assess the hazard of U in the soils. The calculation results showed that half of the soil sampling sites were moderately polluted. For groundwater samples, U concentrations ranged from 0.55 ± 0.04 mg/L to 3.36 ± 0.02 mg/L with a mean value of 2.36 ± 0.36 mg/L, which was significantly lower than that of percolating waters (ranging from 4.56 ± 0.02 mg/L to 12.05 ± 0.04 mg/L, mean 7.91 ± 0.98 mg/L). The results of this study suggest that the distribution of U concentrations in a soil-water system was closely associated with hydrological cycles and U concentrations decreased with circulation path.

Soil test

10.3390/ijerph17030773

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Citations (23)

Hydrogeochemical characteristics of typical mid-temperature hot springs in northern and southern Jiangxi

Bulletin of Mineralogy Petrology and Geochemistry (2024)

Xing-hua SHI Ximin Bai Zhanxue Sun Jinhui Liu Hai-long YE

In order to implement the ″double carbon″ goal and promote the sustainable development and utilization of China′s geothermal resources, the hydrochemical characteristics of Bailing Hot Spring in northern Jiangxi and Tanghu Hot Spring and Baishi Hot Spring in southern Jiangxi were studied by isotopic method and multi-mineral equilibrium simulation. The results showed that Bailing Hot Spring (85℃) is weak alkaline HCO₃-Na type silicon-fluorine water, and its TDS content, H₂SiO₃ content and main ion concentration are lower than those of Tanghu Hot Spring (89℃, weak alkaline HCO₃-Na type silicon-fluorine water) and Baishi Hot Spring (85℃, weak alkaline SO₄-HCO₃-Na type silicon-fluorine water). Although the water of the three hot springs is derived from atmospheric precipitation, the underground retention time is longer in Tanghu Hot Spring and Baishi Hot Spring, while the circulation depth is greater in Bailing Hot Spring. Bailing Hot Spring and Tanghu Hot Spring have strong rock interaction and both show obvious oxygen drift phenomena, but Baishi Hot Spring undergo water-gas isotope exchange, resulting in a decrease in δ¹⁸O in hot water. Dissolution of feldspar, calcite, gypsum, pyrite and oxidation of H₂S provide the source of main ionic constituents in the hot springs. The average reservoir temperatures of Bailing Hot Spring, Tanghu Hot Spring and Baishi Hot Spring are 125, 135 and 149 ℃, respectively, and the corresponding recharge elevations are 1455, 1790 and 1050 m, respectively.

10.3724/j.issn.1007-2802.20240034

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Citations (1)

The Isotopic and chemical characteristics of geothermal fluids from the Western Fjords, Iceland and two selected hot spring areas in the Jinanxi province, SE-China

Gongxin Chen

Low-temperature geothermal activity is widespread in the Western Fjords, Iceland. The thermal waters are classified either as HCO3 or Cl types. A few of the waters are mature according to a classification based on relative concentrations of HCO3, SO4 and Cl, and three of the waters samples fall within the zone of volcanic water. The Na-K-Mg triangular diagram suggests that some of the thermal waters have reached equilibrium and indicate reservoir temperature below 100°C. Boron and chloride concentrations and the B/Cl ratio suggest that the origin of these elements in the hot springs is, apart from the initial concentration of the precipitation, either leaching from rocks with which the water has reacted or due to seawater mixing. The δ 18 O and δD (δ 2 H) are used to trace and determine the origin and movement of groundwater. All the waters follow a local meteoric water line (δD = 6.55 δ 18 O 3.5), indicating that the thermal waters are of meteoric origin. Some of the thermal waters are more depleted in δD than any current precipitation on the Peninsula. This may indicate that these waters have an older, 2 H depleted component from a colder climate regime. Radiogenic carbon ( 14 CpMC) shows good correlation with water temperature, δ 13 C and boron concentration. Earlier helium and carbon isotope study suggested that dilution of the mantle helium input occurs by addition of radiogenic helium and isotopically-light carbon from the uppermost crust. Thermal waters from both Hengjing and Gangxi’nan geothermal areas are classified as HCO3 type water. Na-K-Mg triangular diagrams indicate that the thermal waters from the Hengjing area are partially equilibrated or mixed waters, whereas those from the Gangxi’nan area are immature. The Na-K-Mg-Ca diagram indicates that temperature within the Hengjing geothermal reservoir is in the range of 130-180°C. The δ 18 O and δD suggest that the thermal waters are of meteoric origin and that the recharge altitudes are at 350-800 m and 530-1460 m for the hot springs in Hengjing and Gangxi’nan, respectively. Helium and carbon isotopes from the Hengjing geothermal fluids (helium gas) show that they could be derived partly from the mantle, whereas those from the Gangxi’nan area is considered to be derived from the upmost crustal radiogenic production with addition of 13 C

Radiogenic nuclide

Fjord

Hot spring

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Hydrogeochemistry and subsurface temperature evaluation of selected hot springs in Jiangxi Province, SE-China

WIT transactions on the built environment (2014)

Zhanxue Sun Gongxin Chen Jinhui Liu Weimin Zhang

10.2495/ices20140101

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Sources of Geothermal Water in Jiangxi Province, SE-China: Evidences from Hydrochemistry and Isotopic Composition

Procedia Earth and Planetary Science (2017)

Jiale Li Bai Gao Yihui Dong Gongxin Chen Zhanxue Sun

Jiangxi Province is one of the regions where geothermal water is widely distributed in China, with discovered 96 hot springs and over 30 thermal water boreholes. Eleven geothermal water samples were collected and analyzed for hydrochemical and isotopic characteristics to distinguish the sources of geothermal water in Jiangxi Province, SE-China. Results showed that water temperatures varied from 32.0 to 80.8 °C with an average of 53.4 °C and the dominated compositions are Na-HCO3 type. The hydrogeochemical characteristics as well as isotopic compositions suggest the meteoric origin of geothermal water with recharge altitudes in the range of 400-995 m. Mixing with cold groundwater influences the hydrochemistry of geothermal water. This study furthers the understanding of sources of geothermal water and provides a theoretical basis for better exploitation of geothermal water in the province.

Water source

10.1016/j.proeps.2017.01.057

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Citations (3)

Chelonian fossils from Xinzhou Basin of Hubei Province

Gujizhui dongwu xuebao (1983)

Gongxin Chen

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Hydrogeochemistry and subsurface temperature evaluation of selected hot springs in Jiangxi Province, SE-China

WIT transactions on the built environment (2014)

Zhanxue Sun Gongxin Chen Jinhui Liu Weimin Zhang

Welcome to the WIT Press eLibrary - the home of the Transactions of the Wessex Institute collection, providing on-line access to papers presented at the Institute's prestigious international conferences and from its State-of-the-Art in Science & Engineering publications.

State of art

10.2495/ices140101

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