Toward an atomic-scale understanding of competitive adsorption …
To reveal the competitive adsorption between ions and uncharged molecules, their density distributions are firstly presented in Fig. 2 (a, b, c and d) where the number densities are distributed along the z-axis (normal to the graphene sheet) in the electrolyte system when a voltage of 1.2 V is applied. In addition, the contour of the …
Pollution caused by mining reshaped the structure and …
Ion-adsorption rare earth mining results in the production of high levels of nitrogen, multiple metals, and strong acidic mine drainage (AMD), the impacts of which on microbial assembly and ecological functions remain unclear. ... Subsequently, strong competition contributes to community stability, as positive feedback among microbes …
Study on CO2 and CH4 Competitive Adsorption in Shale …
Summary. The elucidation of the competitive adsorption behaviors between CO2 and CH4 holds great importance in the context of improving natural gas recovery in shale reservoirs. Shale rock, as a complex porous medium, exhibits a highly interconnected multiscale pore network with pore size spanning from several to tens of …
Competitive adsorption behavior of typical heavy metal …
Competitive adsorption behavior of typical heavy metal ions from acid mine drainage by multigroup‑functionalization cellulose: qualitative ... The mining industry has faced enormous pressure regarding its environmental eects due to excessive waste discharge in recent years (Crini and Lichtfouse 2019). ...
Study on CO2 and CH4 Competitive Adsorption in Shale …
The initial step involves conducting Grand Canonical Monte Carlo (GCMC) simulations to simulate the competitive adsorption behaviors of CO 2 and CH 4 in …
Experimental Study of Adsorption Characteristics and …
Then, the competitive adsorption makes CO 2 force the desorption of CH 4 in the coal sample, and finally completes the displacement of CH 4 under the condition of competitive adsorption and increasing pressure difference.
Insights of competitive adsorption on activated carbon of …
This article reports the adsorption study of two emerging contaminants, caffeine and diclofenac, by activated carbon, with the aim of describing their adsorption processes and competition for surface sites. The study is performed first with single contaminants and then with binary mixtures in order to analyze competitive adsorption.
Perspectives on Molecular Simulation of CO2/CH4 …
With the increasing global energy demand, unconventional oil and gas, especially shale gas, have become an important natural gas resource. In the modern …
Molecular simulation study on the effect of coal …
To explore the competitive adsorption characteristics of a CO 2 /CH 4 binary gas in coal with different metamorphic degrees, macromolecular-structure coal models with different metamorphic degrees (anthracite coal, coking coal, and long-flame coal) were constructed based on elemental analysis, X-ray photoelectron spectroscopy …
Molecular simulation of gases competitive adsorption …
To more clearly compare the adsorption competitive characteristics and capacities of CO and other gases in lignite, this paper establishes supercell structures of lignite and adds CO to the ...
Numerical simulation of adsorption process of O
In this paper, the Monte Carlo method (MC) is employed to study the competitive saturation adsorption of oxygen and water vapor inside coal particles, and …
Effects of competitive adsorption with Ni(II) and Cu(II) on …
We concluded that competitive adsorption weakened the improvement of modification on biochar adsorption for Cd(II) and Ni(II), meanwhile, competitive adsorption aggravated the negative effects caused by co-aging with soil; therefore, when treating Cd or Ni pollution, the impacts of competitive adsorption should be fully …
Competitive adsorption behavior of typical heavy metal ions …
To explore the adsorption sequence for TCIS, a ternary adsorption experiment including Cd(II), Pb(II), and Cu(II) was implemented at pH 5. As shown in Fig. 5a, the order of adsorption amounts on TCIS was Cu(II) > Pb(II) > Cd(II) when the concentrations were 25, 50, and 100 mg/L. As the …
Competitive transport and adsorption of CO
The study of pore structure, surface sites, and the competitive adsorption and mass transfer of CO 2, particularly in conjunction with H 2 O, in porous solid materials is crucial for developing CO 2 capture materials with superior performance and achieving carbon emission reduction goals. This paper presents the development and investigation of …
Competitive Adsorption
Competitive adsorption is the main subject in wastewater treatment because cation-cation competition occurs at active adsorption sites. Compared to single component systems, multi-ion systems may have a lower adsorption capacity. However, the performance of adsorbent is highly dependent on concentration and the type of other cations present in …
Molecular modeling of CO2 affecting competitive adsorption …
This study aimed to investigate the adsorption properties of CO2, CH4, and N2 on anthracite. A molecular structural model of anthracite (C208H162O12N4) was …
Effect of oxidative aging of biochar on relative distribution of
The adsorption isotherm results showed that aging treatment decreased the adsorption capacity of Pb2+ and Cd2+ and inhibited the competitive adsorption behavior of heavy metals.
Competitive sorption and availability of coexisting heavy …
The results clearly indicated competitive adsorption among metals with the highest adsorption preference toward Pb. The removal efficiency and partition coefficient (PC) values of heavy metals for FBCs were higher than those for MBCs. These two values increased with MBC pyrolysis temperature under both single- and multi-metals …
Comparative and competitive adsorption of copper, lead, …
The comparative and competitive adsorption of Cu(II), Ni(II), and Pb(II) from aqueous solution using chitosan immobilized on bentonite (CHB) was inves…
Competitive adsorption of Cd(II), Pb(II) and Cu(II) ions from acid mine
Competitive adsorption of Cd(II), Pb(II) and Cu(II) ions from acid mine drainage with zero-valent iron/phosphoric titanium dioxide: XPS qualitative analyses and DFT quantitative calculations. Author links open overlay panel Jingjing Ren a, Liuchun Zheng a b, Yaoming Su c, ...
Comparing adsorption of arsenic and antimony from
This study advances the understanding of the competitive adsorption between As and Sb and the strategy for their simultaneous removal. Therefore, ZIF-8 could serve as a promising adsorbent for the simultaneous removal of As and Sb. ... The anthropogenic activities of mining, smelting, industrial production, and drainage …
[PDF] Competitive adsorption of metals on cabbage waste …
Semantic Scholar extracted view of "Competitive adsorption of metals on cabbage waste from multi-metal solutions." by M. A. Hossain et al.
Macromolecular insight into the adsorption and migration …
School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China. Search for other works by this author on: ... Molecular simulation of coal-fired plant flue gas competitive adsorption and diffusion on coal,"
Investigation of CH4/CO2 competitive adsorption …
Understanding the competitive adsorption-desorption mechanisms in shale is of fundamental significance for enhancing CH4 recovery and CO2 sequestratio…
Effect of Competitive Adsorption between Polycarboxylate
Effect of Competitive Adsorption between Polycarboxylate Superplasticizer and Hydroxypropylmethyl Cellulose on Rheology of Gypsum Paste. Authors ... including rights for text and data mining and training of artificial technologies or similar technologies. Request Username. Can't sign in? Forgot your username? Enter …
Modeling competitive adsorption of arsenate with …
The two approaches gave comparable fits to experimental adsorption data and were consistent with competitive adsorption observed in binary adsorption envelopes. and MO has been described in whole soils with a competitive Freundlich-type isotherm equation (Roy et al., 1986), though the applicability o f the model was limited to cases where the ...
Arsenic(V) adsorption-desorption in agricultural and mine …
Competitive adsorption of arsenate and phosphate. Arsenate adsorption isotherms in competition with phosphate are shown in Fig. 1. The adsorption of As in the presence of phosphate was again higher in the mining soils than in the agricultural soils, although adsorption at low concentrations was - in all cases - lower than in the non …
Influence of injection pressure on gas adsorption and …
CO 2 can cause the desorption of CH 4 in the coal matrix through competitive adsorption, leading to an accelerated increase in total energy. However, N 2 cannot achieve this effect through competitive adsorption.
Molecular simulation study on the effect of coal …
At present, most of the studies on competitive adsorption of gas in coal seam focus on the gas competitive adsorption of coal samples with a single metamorphic degree, and there are few studies on the gas competitive adsorption of coal bodies with different coal rank.
Molecular mechanism of competitive adsorption …
This indicates that the presence of different small molecules can have opposite effects on the competitive adsorption capacity of TP. The presence of small molecules PRO and DMS promotes and hinders the competitive adsorption of TP in the BEN-TP system, respectively. The coexistence of DMS and PRO will further reduce the …
Competitive adsorption behavior of typical heavy metal …
Competitive adsorption behavior of typical heavy metal ions from acid mine drainage by multigroup-functionalization cellulose: qualitative and quantitative mechanism
Competitive adsorption mechanisms of multicomponent …
Highlights • Competitive adsorption mechanism of CO 2 and CH 4 in water-bearing shale are clarified. • Optimal electric field parameters for CS-EGR in shale …
Adsorption Performance and Mechanism of Fe(II) Adsorption …
These characteristics have great potential for the adsorption of heavy metal ions in mine water. Therefore, the adsorption performance and adsorption mechanism of Fe(II) were investigated using the leftover nonstick coal in a mine.