scholarly journals Static permittivity of environmentally relevant low-concentration aqueous solutions of NaCl, NaNO3, and Na2SO4

2020 ◽  
Vol 153 (1) ◽  
pp. 014503
Author(s):  
Amin Gorji ◽  
Nicola Bowler
Keyword(s):  
Aqueous Solutions ◽  
Static Permittivity ◽  
Low Concentration

scholarly journals Recovery of gold(0) nanoparticles from aqueous solutions using effluents from a bioremediation process

RSC Advances ◽  
2016 ◽  
Vol 6 (114) ◽  
pp. 112784-112794 ◽  
Author(s):  
Ana Assunção ◽  
Bernardete Vieira ◽  
João P. Lourenço ◽  
Maria Clara Costa
Keyword(s):  
Aqueous Solutions ◽  
Biological Processes ◽  
Low Concentration ◽  
Secondary Sources

Biological processes for the recovery of gold from low-concentration media derived from leaching of secondary sources are of great importance due to the scarcity of the primary resources and the economic and environmental advantages of these methods.

scholarly journals Mechanism of gelation in low-concentration aqueous solutions of silver nitrate with l-cysteine and its derivatives

Soft Matter ◽  
2017 ◽  
Vol 13 (30) ◽  
pp. 5168-5184 ◽  
Author(s):  
Svetlana D. Khizhnyak ◽  
Pavel V. Komarov ◽  
Maxim M. Ovchinnikov ◽  
Lubov V. Zherenkova ◽  
Pavel M. Pakhomov
Keyword(s):  
Aqueous Solutions ◽  
Silver Nitrate ◽  
Low Concentration

A mechanism of gelation in aqueous solutions of silver nitrate with l-cysteine and its derivatives is discussed.

Aggregation and adsorption behavior of low concentration aqueous solutions of hexadecyltrimethylammonium ortho, meta, and parafluorobenzoate

2012 ◽  
Vol 370 (1) ◽  
pp. 86-93 ◽  
Author(s):  
G. Landázuri ◽  
J. Alvarez ◽  
F. Carvajal ◽  
E.R. Macías ◽  
A. González-Álvarez ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Behavior ◽  
Low Concentration

The Effect of Sulfurhexafluoride on the Photochemistry of Aqueous Solutions

1971 ◽  
Vol 49 (8) ◽  
pp. 1262-1267 ◽  
Author(s):  
R. C. Rumfeldt
Keyword(s):  
Aqueous Solutions ◽  
Low Concentration ◽  
The Relationship ◽  
Saturated Solutions

The effect of SF6 as a specific scavenger for eaq− in the photolysis of aqueous solutions has been studied. The photolysis of aqueous solutions of I− with 2537 Å light and Br−, Cl−, and SCN− with 1849 Å light containing [SF6] = 1.4 × 10−3 M results in the formation of F−, the yields of which are [Formula: see text], 1.98 ± 0.05, 2.40 ± 0.08, and 2.07 ± 0.05, respectively. By comparison with [Formula: see text]from N2O saturated solutions the relationship [Formula: see text] was confirmed. Assuming the same ratio, [Formula: see text] for pure H2O and aqueous HPO42− with 1849 Å radiation and [SF6] = 2.4 × 10−4 is 0.013 ± 0.002 and 0.30 ± 0.07, but these are considered minimum values due to the low concentration of SF6. Despite these yields HPO42− could be used as buffer in 1849 Å photolysis due to its low extinction at this wavelength.

Mixed micelles of poly(styrene-b-3-(methacryloylamino)propyltrimethylammonium chloride-b-ethylene oxide) and anionic amphiphiles in aqueous solutions

2010 ◽  
Vol 88 (3) ◽  
pp. 208-216 ◽  
Author(s):  
Jingjing Liu ◽  
Airi Yoneda ◽  
Dian Liu ◽  
Yuuichi Yokoyama ◽  
Shin-ichi Yusa ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Aqueous Solutions ◽  
Mixed Micelles ◽  
Organic Dyes ◽  
Sodium Dodecyl ◽  
Degree Of Polymerization ◽  
Hydrodynamic Diameter ◽  
Low Concentration ◽  
Fluorescence Measurements ◽  
Kinetics Of

The micelles of poly(styrene-b-3-(methacryloylamino)propyltrimethylammonium chloride-b-ethylene oxide) (PS-b-PMAPTAC-b-PEO) have been successfully prepared in aqueous solutions. The micelles have a PS core, cationic PMAPTAC shell, and PEO corona. Due to the short PS chain (degree of polymerization = 8), the formation of micelles is difficult at a low concentration, and the micelles are detected only at concentrations higher than 1 g L–1. The addition of anionic amphiphiles, such as sodium dodecyl sulfate (SDS) and poly(methacrylic acid) (PMAA), induces the formation of mixed micelles at a low concentration level of the polymer (~0.005 g L–1). This can be ascribed to insolubilization of the cationic PMAPTAC block due to charge neutralization by the anionic amphiphiles. The binding of SDS or PMAA to the PMAPTAC block is confirmed by zeta-potential measurements. The mixed micelles are characterized by dynamic light scattering (DLS), scanning electron microscopy (SEM), and fluorescence measurements. Based on DLS measurements, it is revealed that the hydrodynamic diameter of the mixed micelles falls in the range of 120–130 nm. SEM measurements provided clear pictures of mixed micelles with a spherical morphology. The kinetics of exchange of organic dyes between the micelle particles was investigated by fluorescence techniques. The result indicates that the exchange of the dyes between the micelle particles takes places within a time scale of seconds.

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