Water dispersibility
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In this work, nano-SiO2 have been used as nanocarriers for loading Ce(III) ions (SiO2@Ce3+). After loading, silane coupling agent has been used to modify these nanocarriers (m-SiO2@Ce3+). Then, these modified nanocarriers were added as green inhibitors into the inner epoxy coating matrix, which was based on the epoxy resin (DER 671X75) and hardener (polyamide Epicure 3125). Morphological study by FE-SEM showed that the spherical nanoparticles (mSiO2@Ce3+) were in size < 100 nm and dispersed rather homogeneously into the polyme matrix.
7p dianmotminh02 03-05-2024 3 1 Download
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Part 2 book "Petroleum Engineer's guide to oil field chemicals and fluids" includes content: Gas hydrate control, antifreeze agents, odorization, enhanced oil recovery, fracturing fluids, water shutoff, waste disposal, oil spill treating agents, dispersions, emulsions and foams, defoamers, demulsifiers.
412p muasambanhan10 06-04-2024 2 0 Download
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Ebook "Noncovalent functionalization of carbon nanotubes: Fundamental aspects of dispersion and separation in water" guides the reader through her multidisciplinary research into the non-covalent functionalization of carbon nanotubes in water. Although one of the most remarkable materials of the 21st century, carbon nanotubes often have limited application because of their intrinsically low solubility and polydispersity.
215p coduathanh1122 27-03-2024 7 1 Download
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Part 2 book "Petroleum engineer’s guide to oil field chemicals and fluids" includes content: Gas hydrate control, antifreeze agents, odorization, enhanced oil recovery, fracturing fluids, water shutoff, oil spill treating agents, waste disposal, dispersions, emulsions and foams, defoamers, demulsifiers.
396p muasambanhan09 16-03-2024 6 2 Download
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Ebook "Transport and fate of chemicals in the environment: Selected entries from the encyclopedia of sustainability science and technology" to predict and analyze this process, the mathematics of diffusion is applied to lakes, rivers, groundwater, the atmosphere, the oceans, and transport between these media. A sustainable world requires a deep understanding of the transport of chemicals through the environment and how to address and harness this process.
375p nhanphanguyet 28-01-2024 4 2 Download
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Dredging plays a crucial role in port management, but disposing dredged material in the ocean raises environmental concerns. In recent years, this practice has become more prevalent in Vietnam. This study examined the dispersion of total suspended solids (TSS) in seawater from the submersion of dredged material in Vung Ang Port, northern Vietnam, to evaluate the environmental impact.
15p viplato 02-01-2024 3 2 Download
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Part 1 of ebook "Physics of oscillations and waves: With use of Matlab and Python" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Free and damped oscillations; Chapter 3 - Forced oscillations and resonance; Chapter 4 - Numerical methods; Chapter 5 - Fourier analysis; Chapter 6 - Waves; Chapter 7 - Sound; Chapter 8 - Dispersion and waves on water; Chapter 9 - Electromagnetic waves;...
304p dangsovu 20-10-2023 10 7 Download
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In the present work, we report on the dye removal efficiency of Cobalt chromite, CoCr2O4 nanoparticles synthesized via the solvothermal method. The obtained CoCr2O4 nanoparticles demonstrated that the dye removal efficiency of CoCr2O4 nanoparticles could be enhanced by a reduction of size or improved water dispersibility.
10p viberbers 09-08-2023 4 3 Download
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In this study, phenol was adsorbed by commercial coconut shell charcoal (CSC), which is inexpensive, commercially available, non-toxic, and environmentally friendly. The measurements, namely the density functional theory (DFT) calculation, the energy-dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR), were conducted to characterize the features of the CSC.
13p viberbers 09-08-2023 4 1 Download
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We report a simple design of a water-based broadband metamaterial absorber in the terahertz region. The absorption performance of the designed absorber is simulated using numerical method. Due to the large frequency dispersive permittivity and high relative dielectric loss of water, the bandwidth of the proposed absorber can extend.
10p vispiderman 15-06-2023 6 2 Download
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The study on assessing the impacts of saline intrusion on water resources, from building a hydraulic model MIKE 11 including hydraulic model, rain model, and advection–dispersion module (HD + RR + AD) together with the calculation scenarios in consideration of climate change through the high scenarios RCP 8.5 and low scenarios RCP 4.5 in 2025, 2030 and 2050 are highlighted in the paper.
13p viironman 02-06-2023 4 3 Download
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This study focuses on the stability of nano-emulsions produced by phase inversion temperature method using n-Decane and n-Dodecane as the dispersed phase and pure water/brine as the aqueous phase (continuous phase). A non-ionic surfactant (Brij 30) was used in the preparation of the nano-emulsions. Three different types salt namely \(NaCl\), \(KCl\) and \(MgC{l_2}\) were used at different concentrations.
173p runthenight07 01-03-2023 2 2 Download
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The aim of this work is to research the interactions of water-soluble nitrogen-containing copolymers with essential amino acids in aqueous media. For this, poly(N-vinylformamide-co-N-vinylimidazole) and poly(N-vinylcaprolactam-co-N-vinylimidazole) random copolymers were synthesized by free radical polymerization. The products obtained are characterized by GPC, DLS, and FTIR. The copolymers have a narrow molecular weight distribution and low dispersity.
10p lyhuyenthu 31-01-2023 4 2 Download
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Hierarchical zeolites containing ruthenium oxide nanoparticles were applied in the reaction of dihydroxyacetone isomerization to alkyl lactates and lactic acid. The synthesis of these materials was performed by dispersing the specified amount of two microporous zeolites (HFAU and NaBEA) withan ultrasound bath for 30 min, in a mixture containing cetyltrimethylammonium bromide, water, ethanol and ammonia.
5p vironald 15-12-2022 2 2 Download
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The method is based on vortex-assisted reversedphase dispersive liquid-liquid microextraction (VA-RP-DLLME) to extract and preconcentrate acrylamide by using water as extraction solvent taking advantage the highly polar behavior of this analyte, followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) for its determination.
7p vironald 15-12-2022 8 2 Download
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Thermostable and highly water-soluble polymers are essential for polymer flooding — one of the most effective methods used in the enhanced oil recovery (EOR) in hightemperature (HT) offshore reservoirs. In this research, the copolymerization reaction of acrylamide (AM) and N-vinylpyrrolidone (NVP) monomers were performed via a freeradical mechanism induced by gamma-rays (γ-rays) irradiation.
79p viabigailjohnson 10-06-2022 10 3 Download
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The method is successfully applied for ultrasensitive detection of trace amount benzophenone-type UV filters in environment water samples. It is indicated that the method has the advantages of rapid and efficient enrichment, high sensitivity, and excellent repeatability. Our study extends the application of core-shell mesoporous silica materials and would be of value for pretreatment of trace-amount and complex real samples.
9p thebadguys 15-01-2022 16 0 Download
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The ultrasound-assisted emulsification–solidified floating organic drop microextraction (USAE–SFODME) methodology was combined with flow injection–lame atomic absorption spectrometry (FI–FAAS) for the separation/preconcentration and determination of palladium at ultratrace level. In this method, the palladium ion in the aqueous solution was complexed with acetylacetone (6 × 10−3 mol L−1) in the pH range of 1–7 and was extracted into 40 µL of 1-undecanol, which was sonically dispersed in the aqueous phase.
10p langthannam 29-12-2021 10 0 Download
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The gross α and β activity concentrations in the thermal waters of Karakaya-Aya¸s, ˙I¸cmece-Aya¸s, Beypazarı (Dutluk-Tahtalı), Haymana, and Kızılcahamam spas in Ankara Province were measured by MPC-9604 multi-detector α/β counting system. Ranges of activity concentrations found were from 0.09 to 2.58 Bq L−1 for gross α and from 0.25 to 2.61 Bq L−1 for gross β. The ranges of minimum detectable concentrations for gross α (0.05–0.41 Bq L−1 ) and for gross β (0.04–0.29 Bq L−1 ) were obtained.
7p langthannam 29-12-2021 6 0 Download
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A simple and efficient method for speciation and determination of iron in different water samples was developed. The method is based on ionic liquid ultrasound assisted dispersive liquid–liquid microextraction (IL-USADLLME) followed by spectrophotometric determination. Fe(II) is complexed with 2,4,6-tri(2’-pyridyl)-l,3,5-triazine (TPTZ), neutralized through ion pair formation with sodium dodecyl sulfate (SDS) and extracted into 1-hexyl-3- methylimidazolium hexafluorophosphate [C6MIM][PF6].
10p langthannam 29-12-2021 11 1 Download