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Isotherm models
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Graphene aerogel (GA) was synthesized by chemical reduction of graphene oxide (GO) using ethylene diamine as a reducing agent, which was then followed by a freeze-drying process. In this work, we produced GA by hydrothermal process followed by freeze-drying. The produced adsorbent was then deployed to study the TC adsorption process.
8p
viambani
18-06-2024
1
0
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According to the batch experiments, the adsorption isotherms and the adsorption kinetics for these mesoporous materials are well fitted with the nonlinear Langmuir model and the nonlinear pseudo-second-order model, respectively. Among them, CuFe2O4 powder showed the best phosphate adsorption performance with the maximum P adsorption capacity of 27.49 mgP g-1 , which can be assigned to the highest surface area and the high pH value at its point of zero charge.
7p
dianmotminh02
03-05-2024
5
1
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A thermochemical model was developed to calculate the H2 adsorption isotherm of the original Mg-MOF-74 framework, and its computationally designed isoreticular employing the adsorption energies and vibrational frequencies obtained from density functional theory calculations as input variables. The model reasonably replicates the experimental adsorption isotherm of the original framework at -196˚C within the pressure range up to 1 bar
13p
dianmotminh02
03-05-2024
3
1
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Contaminants in plating wastewater are hard to remove, especially hexavalent chromium ions. This waste stream contains a large amount of Cr6+, a highly toxic metal, potential to cause cancer. To reduce this pollution, sludge from a supply water treatment plant (DWTS) has been used to make adsorbent.
13p
viannee
02-08-2023
3
3
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In study "Using quail eggshell to treat methylene blue in aqueous solution", the raw quail eggshell powder (RQEP) was utilized as a cheap and environmentally friendly adsorbent to remove methylene blue (MB) from aqueous media under different conditions. The morphology of the prepared adsorbent was determined by scanning electron microscopy. The Langmuir and Freundlich isotherm models were used to model the adsorption data. The obtained results showed that the adsorption of MB on RQEP was well-fitted with the Freundlich model.
8p
nhanchienthien
25-07-2023
4
3
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Investigation of Zn(II) adsorption by the chitosan grafted with citric acid via crosslinking with glutraldehyde (C-Gch) was conduced by bath method. Effect of parameters such as pH, contact time, adsorbent dosage and other metal cations was determined.
7p
vidoctorstrange
06-05-2023
4
2
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In this study, the sugarcane bagasse grafted with citric acid was used as a low-cost biosorbent for removal of dyes from the textile wastewater. The adsorption parameters such as initial pH values, dyes concentrations, adsorbent dosages and contact times were investigated by the batch experiments. The Freundlich and Langmuir adsorption isotherm models were used to evaluate the experimental data.
6p
vidoctorstrange
06-05-2023
6
2
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Waste from Jackfruit has little economic value and often causes serious environmental problems. The conversion of jackfruit waste will help reduce waste treatment costs, provide a potential source of raw materials for the activated carbon (AC) and increase economic value. In this study, the ACs from the Jackfruit shell and pulp were synthesized by microwave assistance for removing organic dyes.
13p
vidoctorstrange
06-05-2023
9
2
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The adsorption of Cu(II) ions from aqueous solution onto alginic acid has been investigated based on the establishment of a relationship among pH, conductivity and the concentration of metal ion. It was shown that the adsorption of this metal ion onto alginic acid followed the pseudo-second-order reaction and was conducted by ion exchange mechanism.
10p
vidoctorstrange
06-05-2023
7
3
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In this study, the removal of DMDS was investigated by adsorption on activated carbon cloth (ACC) in the gas phase. Kinetics and isotherm studies were performed. Adsorption kinetics followed by GC-MS and the data were processed using different models. When correlation coefficients (R2 ) of linear regression analysis are analyzed, it is seen that the concordance of experimental data to the pseudo-second-order equation is quite good.
10p
lyhuyenthu
31-01-2023
8
2
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A combined experimental and theoretical study was performed to understand how the pore size of packing materials with pores 60–300 A˚ in size affects the separation of 5–50-mer oligonucleotides. For this purpose, we developed a model in which the solutes were described as thin rods to estimate the accessible surface area of the solute as a function of the pore size and solute size.
10p
viginny
23-12-2022
6
3
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A new method is outlined for constructing realistic models of the mesoporous amorphous silica adsorbent, MCM-41. The procedure uses the melt-quench molecular dynamics technique. Previous methods are either computationally expensive or overly simplified, missing key details necessary for agreement with experimental data.
9p
vironald
15-12-2022
5
2
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Three kinds of hierarchical Mordenite Framework Inverted (MFI)-type nanozeolites including Si-MFI, Al-MFI and Ti-MFI were successfully synthesized by two-stage varying temperature hydrothermal treatment. Taking toluene as the probe molecule, a series of methods were used to evaluate the adsorption properties of as-synthesized hierarchical zeolites samples including the adsorption breakthrough curves, simulation of adsorption isotherms as well as kinetics models and toluene-TPD (the temperature programmed desorption of toluene).
10p
vironald
15-12-2022
3
3
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Sorption of gases in micro- and mesoporous materials is typically interpreted on the basis of idealized structural models where real structure effects such as defects and disorder are absent. For covalent organic frameworks (COFs) significant discrepancies between measured and simulated adsorption isotherms are often reported but rarely traced back to their origins.
10p
vironald
15-12-2022
9
2
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Kaolin sample (mixture of halloysite and kaolinite) from Thach Khoan, Phu Tho province was studied to remove Pb2+ ions from an aqueous solution. The SEM-EDS and TEM analysis showed that in the kaolin sample, tubular halloysite and plate kaolinite minerals coexist, similar to the results from previous studies.
9p
vimelindagates
18-07-2022
4
2
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In the work "Adsorption behavior of Pb(II) in aqueous solution using coffee husk-based activated carbon modified by nitric acid", activated carbon (AC) was prepared from coffee husk and modified by nitric acid for effective lead ions removal from aqueous solution. The as-prepared samples have uniform particles size, developed surface area and contain acidic surface functional groups. Nitric acid modification showed a pronounced effect on improving Pb(II) adsorption capacity.
10p
runordie3
27-06-2022
9
2
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In addition to reduction, MB decolorization mainly results from adsorption on the surface of GdB6 based on the adsorption-desorption tests. The adsorption behavior follows the pseudo-second-order kinetics and Freundlich isotherm model.
8p
thebadguys
15-01-2022
37
0
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This finding raise doubt about the effectiveness of the traditional adsorption isotherms and kinetics models to describe trace metals removal using RM, contributing with new insights for future researches involving these hazardous materials.
10p
thebadguys
15-01-2022
7
0
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The mechanism of dye-adsorbent interaction is described on the basis of zero-point charge and zeta potential techniques. Batch adsorption studies on MCH NM show excellent adsorption activity of 199.02 mg/g in 22 min towards RB13 dye, maximum value ever reported for any reactive dye. Equilibrium adsorption data and adsorption kinetics were well fitted into Langmuir isotherm model and pseudo second order model predicting chemically rate controlled monolayer adsorption.
9p
thebadguys
15-01-2022
12
1
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The particle load removal isotherm model followed the Langmuir model. Therefore, it can be inferred from the study that MSC can be used effectively in coag-flocculation for removal of particle load from paint effluent (PE).
13p
thebadguys
15-01-2022
7
0
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