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1521
Fabrication of magnesium oxide–calcium alginate hydrogel for scaffolding yttrium and neodymium from aqueous solutions
Published 2023-09-01“…The calculated thermodynamic parameters for the nano MgO/Ca-alginate/Nd/Y system show that the positive charge of ΔHo confirmed the endothermic nature of the sorption process, ΔSo (positive) indicates an increase in reaction system disordering, and ΔGo (negative) indicates a spontaneous process. …”
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1522
On the Behavior of Newly Synthesized Functionalized Imidazolium-Based Ionic Liquids for Highly Efficient Extraction and Separation of Pirimicarb from Orchard Real Wastewater
Published 2022-01-01“…Thermodynamic analyses indicated spontaneous, endothermic, and entropy-driven adsorption processes. …”
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1523
Structural control of V2O5 nanoparticles via a thermal decomposition method for prospective photocatalytic applications
Published 2023-01-01“…The thermodynamic parameters indicated that the adsorption was spontaneous and endothermic. The reaction kinetics followed the pseudo-second-order model. …”
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1524
Synthesis and characterization of bismuth-doped hydroxyapatite nanorods for fluoride removal
Published 2023-07-01“…Thermodynamic data revealed that the adsorption process is endothermic and spontaneous. Regeneration and reuse analysis insured that the materials have good potential for reuse. …”
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1525
Gene expression variations in high-altitude adaptation: a case study of the Asiatic toad (Bufo gargarizans)
Published 2017-07-01“…Conclusions These broadly suppressed expression patterns at high altitudes are in strong contrast to those of endothermic homeotherms, suggesting poikilothermic vertebrates may have adopted different strategies at high altitudes. …”
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1526
Thermostability of Organobentonite Modified with Poly(acrylic acid)
Published 2023-05-01“…Dehydroxylation of montmorillonite (MMT) in bentonite begins at about 500 °C, which leads to a drastic structural transformation. An endothermic effect associated with the remodeling of the mineral structure was observed on the DSC curve in the range of 500–750 °C. …”
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1527
RSM optimization studies for cadmium ions adsorption onto pristine and acid-modified kaolinite clay
Published 2023-08-01“…The thermodynamic reveal that the reaction is spontaneous and endothermic in nature, and increase in randomness between the adsorbent and adsorbate. …”
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1528
Preparation and dye removal performance of MnFe<sub>2</sub>O<sub>4</sub>@diatomite composite
Published 2020-10-01“…Massive discharge of dyes by industries into environment has posed a threat to aquatic organisms and human health.In order to reduce dye pollution, a MnFe<sub>2</sub>O<sub>4</sub>@diatomite composite adsorbent(MnFe<sub>2</sub>O<sub>4</sub>@DE) with excellent removal effect of malachite green(MG) in wastewater and simple preparation method was prepared in this study.A variety of characterization methods were used to analyze structural properties of the composite and its adsorption effect on MG was also systematically studied.The results showed that the MnFe<sub>2</sub>O<sub>4 </sub>nanoparticles were well distributed on the surface of diatomite.Compared to two monomer materials, the specific surface area(112.1 m<sup>2</sup>/g) and pore volume(0.24 cm<sup>3</sup>/g) of the composite increased significantly.The as-synthesized composite exhibited enhanced adsorption behavior to MG, and its maximum adsorption capacity could reach 25.70 mg/g, which was up to around 1.89 and 1.13 times as much as that of diatomite(DE) and MnFe<sub>2</sub>O<sub>4</sub> respectively.The adsorption process was spontaneous and endothermic, which was consistent with pseudo-second-order kinetic model and Langmuir model.And MnFe<sub>2</sub>O<sub>4</sub>@DE also showed good reusability.After 4 times of reuse, composite still had 87.56% removal effect on MG.Therefore, MnFe<sub>2</sub>O<sub>4</sub>@DE has good application potential in dye pollution control.…”
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1529
Adsorption isotherm, kinetic, and optimization studies for copper (II) removal from aqueous solutions by banana leaves and derived activated carbon
Published 2022-04-01“…Values of thermodynamic parameters (ΔG, ΔH, and ΔS) of copper (II) adsorption onto the surface of BL and BLAC revealed the feasibility, spontaneity, and endothermic nature of copper (II) adsorption on these surfaces. …”
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1530
SiO2 particles effect on the mechanical properties of the starch/PVA blends
Published 2018-10-01“…It was seen that (PVA) of (Tg=105 oC); The glass transition temperature which was decrease with starch ratio that was attributed to glass transition relaxation process due to micro-Brownian motion of the main chain back bond. The endothermic peak at 200 oC was attributed to melting point of (PVA). …”
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1531
Adsorption of Congo Red Dye from Aqueous Solution using ZnO and Al2O3/ZnO Composite: Isotherm, Kinetic and Thermodynamic Data
Published 2022-06-01“…Experimentally, the process was endothermic and was supported by the positive values of enthalpy (ΔH) with positive values of entropy (ΔS). …”
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1532
A Novel Low-Cost Bio-Sorbent Prepared from Crisp Persimmon Peel by Low-Temperature Pyrolysis for Adsorption of Organic Dyes
Published 2022-08-01“…The adsorption thermodynamics illustrated that the adsorption of MB onto CPP200 was spontaneous and endothermic. EDS and IR analyses of CPP200 for both pre- and post-adsorption of MB showed that electrostatic interactions between oxygen-containing groups on biochar and target MB dominated the adsorption procedure, in addition to hydrogen bonding interactions. …”
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1533
Co-Utilization of Sewage Sludge and Rice Husk in Ceramsite Preparation with Selective Adsorption Capacity to Pb
Published 2022-06-01“…Thermodynamic parameters (ΔH<sup>0</sup> > 0, ΔG<sup>0</sup> < 0, ΔS<sup>0</sup> > 0) indicated that the adsorption reaction was spontaneous and endothermic. The possible adsorption mechanisms are as follows: (1) SRC is rich in layered mesoporous structure, which provides sufficient reaction sites for Pb adsorption; (2) the sintered lawsonite and muscovite can strongly attract Pb and then form a new phase (Pb<sub>10</sub>[Si<sub>2</sub>O<sub>7</sub>]<sub>3</sub>(OH)<sub>2</sub>); (3) Pb<sup>2+</sup> can bond with the Si–O- bond in aluminosilicates, and the introduction of Pb elevates the degree of polymerization of aluminosilicates in turn, indicating that the adsorption process is stable.…”
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1534
Removal of Nickel (II) ions from Aqueous Solutions Using Chicken Feather Nanoparticles: Study of Kinetic, Isotherm and Thermodynamic Models
Published 2021-10-01“…The thermodynamic parameters such as Gibb's Free Energy (ΔG), Enthalpy (ΔH) and Entropy (ΔS) indicated that the adsorption of nickel ion were spontaneous and endothermic at 288–313 °K. Comparing the determination coefficients between measured data and obtained value from pseudo- second-order model (R2 = 0.95) and pseudo- first-order model (R2 = 0.65) showed that the pseudo- second-order model describes experimental data better. …”
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1535
Triborheological Study under Physiological Conditions of PVA Hydrogel/HA Lubricant as Synthetic System for Soft Tissue Replacement
Published 2021-02-01“…Thermal behavior was evaluated by differential scanning calorimetry (DSC) in the range of 25–250 °C (5 °C/min rate), showing an endothermic behavior with a melting temperature (Tm) around 231.15 °C. …”
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1536
Equilibrium, Kinetic and Thermodynamic Studies of Biosorption of Methylene Blue on Goethite Modified Baobab Fruit Pod (<i>Adansonia Digitata</i> L.)
Published 2020-08-01“…GMB adsorbed more of MB than UB and the process was endothermic. Keywords: Biosorption, Goethite, Baobab, Isotherms, Methylene blue. …”
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1537
Towards Sustainable Protein Sources: The Thermal and Rheological Properties of Alternative Proteins
Published 2024-01-01“…The differential scanning calorimetry analysis produced dry amorphous-shaped curves and paste curves with a more distinct endothermic peak. The extracted linear temperature ranges for processing within food production were 70–90 °C for spirulina, 87–116 °C for soy protein, 67–77 °C for pea protein, and 87–97 °C for brown rice protein. …”
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1538
Magnetic biochar derived from Juglans regia for the adsorption of Cu2+ and Ni2+: Characterization, modelling, optimization, and cost analysis
Published 2023-11-01“…In terms of thermodynamic parameters, it appears that the adsorption of Cu2+ and Ni2+ took place in an endothermic and physical manner. The thermodynamic study determined that the activation energy (KJ/Mol) for Cu was 117.27 and for nickel was 100.24. …”
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1539
SIMULASI PENGARUH STEAM-TO-CARBON RATIO DAN TUBE OUTLET TEMPERATURE TERHADAP REAKSI STEAM REFORMING PADA PRIMARY REFORMER DI PABRIK AMONIAK
Published 2017-11-01“…In Primary Reformer, the reaction commonly occurred at 450-800oC and 36 bars. The endothermic reaction occurred in Ni-based catalyst inside the tube. …”
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1540
Synthesis of a nanocomposite with holocellulose extracted from barley straw and montmorillonite, and optimization of the removal of methylene blue dye using the synthesized adsorbe...
Published 2023-11-01“…Moreover, thermodynamic study revealed that adsorption of methylene blue is endothermic and spontaneous while enthalpy and Gibbs free energy of adsorption are positive and negative, respectively. …”
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