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Zhang, Xin
- Removing TCE and PCE of Groundwater with Iron-Carbon Micro-Electrolysis
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Authors
Affiliations
1 College of Civil Engineering and Architecture, Liaoning University of Technology, 121001 Jinzhou, CN
1 College of Civil Engineering and Architecture, Liaoning University of Technology, 121001 Jinzhou, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 3 (2016), Pagination: 1005-1008Abstract
The iron-carbon (Fe/C) micro-electrolysis method was used to dispose trichloroethylene (TCE) and tetrachloroethylene (PCE) of polluted groundwater, and several factors such as the mass ratio of Fe/C, the characteristics of activated carbon, the particle size of iron powder and influent pH were investigated. The optimal conditions were acquired. The mass ratio of Fe/C was 1:1, coconut shell charcoal and 30-mesh iron powder were used, and influent pH was 5. Under the optimal conditions, mixed solution of TCE and PCE was treated by Fe/C micro-electrolysis method and the tests got 82.4% of the TCE removal rate and 59.4% of the PCE removal rate.Keywords
Groundwater, Trichloroethylene, Tetrachloroethylene, Micro-Electrolysis.Full Text
References
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- Coupled Thermo-Hydro-Mechanical Modelling of Carbon Dioxide Sequestration in Saline Aquifers Considering Phase Change
Abstract Views :212 |
PDF Views:73
Authors
Weiyong Lu
1,
Xin Zhang
2
Affiliations
1 School of Mines, Luliang University, Lvliang, Shanxi 033000, CN
2 School of Minerals and Energy Resources Engineering, Faculty of Engineering, University of New South Wales, Sydney NSW 2052, AU
1 School of Mines, Luliang University, Lvliang, Shanxi 033000, CN
2 School of Minerals and Energy Resources Engineering, Faculty of Engineering, University of New South Wales, Sydney NSW 2052, AU
Source
Current Science, Vol 119, No 6 (2020), Pagination: 973-983Abstract
Carbon dioxide (CO2) sequestration in saline aquifers is considered to be one of the most viable measures to control its emissions. During the process of CO2 injection, phase changes of gas, liquid and supercritical CO2 will lead to changes in the density, dynamic viscosity, specific heat capacity and CO2 heat conductivity and solubility in water, which will influence the injection pressure and spatial distribution of CO2. To study the characteristics of injection pressure and spatial distribution of CO2 in saline aquifers, equations of state such as Peng–Robinson equation were used to realize the continuous calculation of the physical property parameters of gas, liquid and supercritical CO2. Based on the continuous physical property parameters, a fully thermo-hydro-mechanical (THM) coupled model was developed and then solved and verified using COMSOL Multiphysics software. It has been shown in this study that: (i) the predicted CO2 injection pressure by the THM coupled model is higher than that obtained from the uncoupled model; (ii) at the top boundary of the reservoir, the spatial distribution of CO2 can be divided into a rapid increase region, a slow decrease region, a rapid decrease region and an initial saturation region along the direction of CO2 migration and (iii) larger the reservoir geothermal gradient, more obvious is the gravity override effect.Keywords
Carbon Dioxide Sequestration, Phase Change, Saline Acquifers, Thermo-Hydro-Mechanical Modelling.Full Text
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