The state conversion of the nature geo-environment results in slope stability problems. Loose deposit soil contains a lot of calcium, a large number of Calosing as water-saturated process. In order to find the influences to micro-structure of soil body that caused by chemical activity of Ca,...
Coalbed gas co-produced water is relatively low in sulfate (SO4) because the chemical conditions in coal beds favor the conversion of SO4 to sulfide, which is removed as a gas or as a precipitate. According to NRC (2010), bicarbonate and sodium are more prevalent than magnesium, calcium, ...
Calcium (Ca) might also have a contrasting relationship between the decomposition of different substrates: Ca promotes physicochemical protection of SOC20, yet Ca availability may stimulate lignin-degrading fungi and litter decomposition21. However, the consistency of relationships between metals and ...
Immobilization and migration of arsenic during the conversion of microbially induced calcium carbonate to hydroxylapatite 2021, Journal of Hazardous Materials Show abstract Prediction and observation of formation of Ca–Mg arsenates in acidic and alkaline fluids: Thermodynamic properties and mineral assemblage...
For time-to-depth conversion of the airgun seismic data, a velocity of 1600 m/s was assumed for the entire thickness of the Quaternary deposits. In 2021, a cross line was acquired exactly over the drill site with a 3.5 kHz pinger high-resolution single-channel seismic system. These ...
Moreover, the effect of hard ions (calcium and magnesium) in polymer drive is significant where the increase in the concentration of hard ions increases the retention of surfactant. Furthermore, it is important to mention that the lowest level of surfactant retention was achieved through a ...
Minerals constitute a primary ecosystem control on organic C decomposition in soils, and therefore on greenhouse gas fluxes to the atmosphere. Secondary minerals, in particular, Fe and Al (oxyhydr)oxides—collectively referred to as “oxides” hereafter
naturalcarbonreservoirs,suchastheoceans,subsurfacereservoirs(suchasbrinesordepletedoil&gasfields),ortheterrestrialcarbonpool.Relatedtosubsurfacereservoirsarecarbonaterocks,whicharethedominantnaturalpoolforoxidizedcarbon.Carbonaterocksdeveloplargelyfromtheinteractionofaqueousfluidswithsilicaterocksenrichedincalciumandmagnesium,...
For the coarse fraction the carbonaceous component is minor and assumption is made for the conversion factor k, of OC-to-POM (Particulate Organic Matter) which is fixed to the value of 1.8 accounting for secondary species. The coarse soluble calcium is shown to display a correlation (regression...
of Ca2+in hydrochemical analysis relates to hardness. Calcium is found naturally in various environmental settings and occurs widely in groundwater aquifers. Dissolved calcium hydroxide forms soda and hydrogen gas. It typically occurs when CO2is freed, resulting in the development of carbonic acid, af...