scholarly journals The hydrochemical evolution of a constructed peatland in a post-mining landscape six years after construction

2022 ◽  
Vol 39 ◽  
pp. 100978
Author(s):  
Kelly M. Biagi ◽  
Sean K. Carey
Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Qin Ge ◽  
Xing Liang ◽  
Menggui Jin ◽  
Jing Li ◽  
Yan Liu

The hydrogeochemical and stable isotope compositions of aquitard porewater samples from three boreholes were investigated to determine the origin, salinization, and hydrochemical evolution of water in the North Jiangsu coastal plain, China. Three porewater groups were identified based on the water-bearing subsystems. The total dissolved solids (TDS) of porewater samples highly varied from 0.03 to 26.1 g/L. Molar Cl/Br ratios and δ18O and δ2H data indicate that the source of Group 1 salinized porewater was the Holocene seawater, whereas Group 3 salinized samples were probably related to the remnant palaeoseawater of the Late Pleistocene. Group 2 samples had low salinity (TDS < 1 g/L) and undetectable Br− concentrations, which were probably recharged during a colder period and without evidence of seawater involvement. The salinized porewater was likely diluted by freshwater, as evidenced by its depleted isotopes and low salinity relative to standard seawater. The ionic ratios and ionic deltas indicate that considerable water-rock interactions (e.g., cation exchange and mineral weathering) also accounted for the hydrochemical constituents of porewaters, and cation exchange seems to be more noticeable at low salinity.


2020 ◽  
Vol 20 (6) ◽  
pp. 1360
Author(s):  
Evarista Ristin Pujiindiyati ◽  
Paston Sidauruk ◽  
Tantowi Eko Prayogi ◽  
Faizal Abdillah

The chemical characteristics of the Ciliwung River were analyzed to understand hydrochemical evolution. A fraction of sea water mixture and kinds of mineral controlling for chemicals were also determined. During three year investigations in 2015, 2016, and 2018, electrical conductivity increased with decreasing elevations. Two hydrochemical facies had been identified for the Ciliwung river water; those were Ca-Mg-HCO3 and Ca-Na-HCO3.  The river water mixing with seawater was recognized in the Mangga Dua site in which its water type had shifted to Na-Ca-HCO3-Cl. Based on Na-Cl contents, the fraction of sea water into the Ciliwung River reached 2% in the Mangga Dua site during the dry season and decreased to 0.7% during the rainy season in 2015. The much higher monthly rainfall during the dry season in 2016 and 2018 had washed out invading seawater from the Mangga Dua site; its fraction of sea water was less than 0.4%. Saturation indexes with respect to calcite, dolomite, and gypsum minerals showed an increasing trend related to the decreasing elevations. All water samples were undersaturated with respect to gypsum. Meanwhile, saturation indexes with respect to calcite and dolomite mostly indicated undersaturated, except in the Mangga Dua site that was saturated (during the rainy season in 2015 and dry season in 2018) and supersaturated during the dry season in 2015.


2020 ◽  
Vol 114 ◽  
pp. 104524 ◽  
Author(s):  
Christos Christofi ◽  
Adriana Bruggeman ◽  
Christoph Kuells ◽  
Costas Constantinou

2014 ◽  
Vol 45 ◽  
pp. 94-104 ◽  
Author(s):  
Debbie Allen ◽  
W. George Darling ◽  
Peter J. Williams ◽  
Charlie J. Stratford ◽  
Nick S. Robins

2018 ◽  
Vol 126 ◽  
pp. 81-86
Author(s):  
Zhongpei Liu ◽  
Wanhua Yuan ◽  
Yuping Han ◽  
Dongqing Zhang ◽  
Jianxun Liu

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