Influence of water-rock interaction on the pH and heavy metals content of groundwater during in-situ oil shale exploitation

Oil Shale ◽  
2020 ◽  
Vol 37 (2) ◽  
pp. 104
Author(s):  
S-y Hu ◽  
C-L Xiao ◽  
X-J Liang ◽  
Y-q Cao
Keyword(s):  
Heavy Metals ◽  
Oil Shale ◽  
Rock Interaction ◽  
Influence Of Water ◽  
Water Rock Interaction

The influence of oil shale in situ mining on groundwater environment: A water-rock interaction study

Chemosphere ◽  
2019 ◽  
Vol 228 ◽  
pp. 384-389 ◽  
Author(s):  
Shuya Hu ◽  
Changlai Xiao ◽  
Xiujuan Liang ◽  
Yuqing Cao ◽  
Xinrui Wang ◽  
...  
Keyword(s):  
Oil Shale ◽  
Interaction Study ◽  
Rock Interaction ◽  
Groundwater Environment ◽  
Water Rock Interaction

scholarly journals Release characteristics of Pb and BETX from in situ oil shale transformation on groundwater environment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Han Wang ◽  
Wenjing Zhang ◽  
Shuwei Qiu ◽  
Xiujuan Liang
Keyword(s):  
Alternative Energy ◽  
Oil Shale ◽  
Oil And Gas ◽  
Ex Situ ◽  
Rock Interaction ◽  
Groundwater Environment ◽  
Benzene Series ◽  
Over Time ◽  
Water Rock Interaction

AbstractOil shale has received attention as an alternative energy source to petroleum because of its abundant reserves. Exploitation of oil shale can be divided into two types: ex situ and in situ exploitation. In situ transformation has been favoured because of its various advantages. Heating of oil shale leads to the production of oil and gas. To explore the influence of solid residue after pyrolysis of oil shale on the groundwater environment, we performed ultrapure water–rock interaction experiments. The results showed that Pb tended to accumulate in solid residues during pyrolysis. Additionally, the Pb concentration goes up in the immersion solution over time and as the pyrolysis temperature increased. In contrast, when we measured the soaking data of benzene series, the concentrations of benzene and toluene produced at temperatures over 350 ℃ were highest in the four oil shale pyrolysis samples after pyrolysis. The water–rock interaction experiment for 30 days led to benzene and toluene concentrations that were 104 and 1070-fold over the limit of China’s standards for groundwater quality. Over time, the content of benzene series was attenuated via biological actions. The results show that in situ oil shale mining can lead to continuous pollution in the groundwater environment.

scholarly journals Formation and loss of metastable brucite: does Fe(II)-bearing brucite support microbial activity in serpentinizing ecosystems?

2020 ◽  
Vol 378 (2165) ◽  
pp. 20180423 ◽  
Author(s):  
A. S. Templeton ◽  
E. T. Ellison
Keyword(s):  
Ultramafic Rocks ◽  
Earth System ◽  
Aqueous Alteration ◽  
Rock Interaction ◽  
Secondary Minerals ◽  
Dissolved Carbon ◽  
The Earth ◽  
Reaction Zones ◽  
Water Rock Interaction

Ultramafic rocks undergo successive stages of hydration and oxidation during water/rock interaction, giving rise to secondary minerals such as brucite, serpentine, magnetite and the production of H 2(g) . Ferroan brucite ( M g x Fe ( 1 − x ) 2 + ( OH ) 2 ) often forms under low water/rock ratios early during the ‘serpentinization’ process. The formation of ferroan brucite sequesters Fe(II) and suppresses the production of H 2 , thereby limiting the flux of reductants suitable for sustaining microbial metabolism. Yet ferroan brucite is a relatively soluble mineral ‘reservoir’ for reactive Fe(II). Brucite is often metastable and can be lost at later stages of peridotite hydration when there is a significant increase in the water/rock ratio or the activity of SiO 2 or CO 2 . The Fe(OH) 2 component of brucite has the thermodynamic potential to reduce most aqueous oxidants. Therefore, ferroan brucite may reduce water and/or dissolved carbon, nitrogen and sulfur species, while the Fe(II) is converted into more stable secondary minerals such as Fe(II/III)-oxides and hydroxides (e.g. green-rust, magnetite, iowaite and pyroaurite) and ferric serpentine. The reactivity of ferroan brucite, and the associated rate of Fe solubilization and oxidation in subsurface fluids, could be a key regulator on the rate of electron transfer from serpentinites to the rock-hosted biosphere. Aqueous alteration of ferroan brucite may significantly modulate the H 2 activity in fluids circulating within partially serpentinized rocks, and buffer H 2 as it is lost by advection or in situ consumption by a hydrogenotrophic microbial community. Moreover, there may be microbial organisms that specifically colonize and use ferroan brucite as an electron donor for their metabolism. The energy fluxes sustained by localized brucite oxidation may often be sufficiently large to sustain abundant microbial communities; water/rock reaction zones where brucite is consumed could serve as environments to search for extant or fossil serpentinite-hosted life. This article is part of a discussion meeting issue ‘Serpentinite in the Earth System’.

scholarly journals Heavy Metal Concentrations in the Groundwater of the Barcellona-Milazzo Plain (Italy): Contributions from Geogenic and Anthropogenic Sources

2019 ◽  
Vol 16 (2) ◽  
pp. 285 ◽  
Author(s):  
Marianna Cangemi ◽  
Paolo Madonia ◽  
Ludovico Albano ◽  
Alessandro Bonfardeci ◽  
Maria Di Figlia ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Mitigation ◽  
Human Health Risk ◽  
Ore Deposits ◽  
Pollution Sources ◽  
Anthropogenic Sources ◽  
Rock Interaction ◽  
Complex Scenario ◽  
Italian Legislation ◽  
Water Rock Interaction

We collected and analysed 58 samples of groundwater from wells in the Barcellona-Milazzo Plain, one of the most important coastal aquifers of Sicily (Italy), to determine major, minor, and trace element concentrations. In this area, geogenic and anthropogenic sources of heavy metals and other pollutants co-act, making the individuation of the main pollution sources difficult. Our work was aimed at the application of geostatistical criteria for discriminating between these pollution sources. We used probability plots for separating anomalous values from background concentrations, which were plotted on maps and related to possible sources of pollutants. Our results indicate that hydrothermal fluid circulation and the water–rock interaction of country rocks that host mineralized ore deposits generate a significant flux of heavy metals to groundwater, as well as anthropogenic sources like intense agriculture and industrial activities. In particular, NO3, F, and Ni exceed the Maximum Admitted Concentrations (MACs) established by the WHO and Italian legislation for drinking-water. The spatial distributions of geogenic and anthropogenic sources were so deeply interlocked that their separation was not easy, also employing geostatistical tools. This complex scenario makes the implementation of human health risk mitigation actions difficult, since the flow of pollutants is in many cases controlled by simple water–rock interaction processes.

scholarly journals Study on the Creep Constitutive Model of a Sandstone Rock under the Water-Rock Interaction

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Zuosen Luo ◽  
Zuoxiang Zhu ◽  
Jianlin Li ◽  
Lehua Wang ◽  
Qiao Jiang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Constitutive Model ◽  
Nonlinear Creep ◽  
Rock Interaction ◽  
Long Term Stability ◽  
Sandstone Rock ◽  
Influence Of Water ◽  
Creep Constitutive Model ◽  
Water Rock Interaction

With the continuous construction of large-scale geotechnical engineering, more and more attention has been paid to the long-term stability of rock mass engineering, especially the problem of rock creep under the influence of water. Combined with the author’s previous research on the triaxial creep characteristics of sandstone under water-rock interaction, a nonlinear creep constitutive model was established to capture the degradation behavior of a sandstone rock due to cyclic wetting and drying of the reservoir water. Due to the limitations of the visco-elastoplastic model, a thorough modification was done to account the effect of the water-rock interaction on the mechanical degradation of the sandstone rock. Finally, the predicted results were proved to be in a good agreement with the experimental results. Moreover, the strong correlations between the predicted results and the experimental results show the effectiveness of the modified model to scrutinize the nonlinear creep behavior of sandstone rock. Relevant research results have important theoretical significance for the accurate prediction and effective control of the long-term stability of rock mass engineering under the influence of water-rock interaction.

scholarly journals Study on the influence of water-rock interaction on streamflow conductivity based on hydrograph separation

2019 ◽  
Vol 98 ◽  
pp. 11005 ◽  
Author(s):  
Weifei Yang ◽  
Changlai Xiao ◽  
Xiujuan Liang ◽  
Zhihao Zhang
Keyword(s):  
Power Function ◽  
Interaction Time ◽  
Filter Method ◽  
Hydrograph Separation ◽  
Rock Interaction ◽  
Recursive Filter ◽  
Influence Of Water ◽  
Dissolved Components ◽  
Two Parameter ◽  
Water Rock Interaction

The conductivity of the streamflow is controlled by the content of the dissolved components, which mainly come from the water-rock interaction of the baseflow. This paper showed that the conductivity sequence controlled by water-rock interaction in the runoff process can be screened out by the two-parameter recursive filter method. The analysis of the streamflow and conductivity series of USGS gauge numbered 02298202 from October 2005 to October 2009 showed that the water-rock interaction controls the conductivity characteristics of the stage of streamflow recession. And with the increase of water-rock interaction time (T), the conductivity of the streamflow increases in a power function, which satisfies the equation C = 252.92T0.262.

Sign in / Sign up

Export Citation Format

Share Document