Latest Research on Aqueous Solution Research: Sep – 2019

Sorption of dye from aqueous solution by peat

The natural process of 2 dyes, namely, Basic Blue sixty nine ANd Acid Blue twenty five onto vegetable matter has been studied in terms of pseudo-second order and 1st order mechanisms for chemical natural process still as an intraparticle diffusion mechanism process. The batch natural process process, supported the belief of a pseudo-second order mechanism, has been developed to predict the speed constant of natural process. the equilibrium capability and initial natural process rate with the impact of agitation, initial dye concentration and temperature. AN energy of activation of natural process has conjointly been evaluated with the pseudo-second order rate constants. [1]

Protein hydration in aqueous solution

High-resolution nucleon nuclear resonance studies of macromolecule association in solution show that there square measure 2 qualitatively differing types of association sites. A well-defined, tiny variety of water molecules within the interior of the macromolecule square measure in identical locations within the crystal structure and in answer, and their residence times square measure within the vary from regarding 10(-2) to 10(-8) second. association of the macromolecule surface in answer is by water molecules with residence times within the subnanosecond vary, even after they square measure placed in association sites that contain regular water within the x-ray structures of macromolecule single crystals. [2]

Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution

Kinetic knowledge for the radicals H⋅ and ⋅OH in solution,and the corresponding radical anions, ⋅O− and eaq−, are critically pulse lysis, flash photolysis and different ways. Rate constants for over 3500 reaction area unit tabulated, together with reaction with molecules, ions and different radicals derived from inorganic and organic solutes. [3]

Using Atomic Force Microscopy to Measure Thickness of Passive Film on Stainless Steel Immersed in Aqueous Solution

Employing atomic force research (AFM) to live passive film thickness on chrome steel (SS) in solution is projected. SUS304 primary solid solution and SUS329J4L duplex SS samples part coated by gold were set in a very minicell. to get rid of the initial film, the SS surface however gold was carved  victimization dilute sulphuric acid. when improvement, electric circuit potential (OCP), and distance from the sample surface to the highest of the gold were measured. They were then immersed in either one.0% NaCl; 5.0% NaCl; or solution with pH starting from one.0 to 10.0 and measured once more. variations between the primary and ensuant measures of OCP prompt a passive film had shaped in resolution with pH starting from a pair of.8 to 10.0. Similarly, variations among AFM measures discovered the ascertained film thickness multiplied with increase in pH and with decrease in chloride ions. [4]

Removal of Aniline and from Aqueous Solutions by Coagulation/Flocculation–Flotation

The aim of this study was to judge the potency of the coagulation/ natural {process|natural action|action|activity} and flotation process for aminobenzine removal from binary compound solutions, that the dissolved air flotation (DAF) was applied in laboratory scale. once determination of the optimum condition of pH and also the dose of Polyaluminum chloride by coagulation/ natural {process|natural action|action|activity} process, the impact of the effective parameters as well as the concentration of the agent, natural action time, flotation time and saturation pressure on the removal potency of the aminobenzine and COD By dissolved air flotation was studied. The DAF method will scale back COD and aminobenzine up to eighty nine.6% and 95%, severally. [5]

Reference

[1] Ho, Y.S. and McKay, G., 1998. Sorption of dye from aqueous solution by peat. Chemical engineering journal, 70(2), (Web Link)

[2] Otting, G., Liepinsh, E. and Wuthrich, K., 1991. Protein hydration in aqueous solution. Science, 254(5034), (Web Link)

[3] Buxton, G.V., Greenstock, C.L., Helman, W.P. and Ross, A.B., 1988. Critical review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅ OH/⋅ O− in aqueous solution. Journal of physical and chemical reference data, 17(2), (Web Link)

[4] Using Atomic Force Microscopy to Measure Thickness of Passive Film on Stainless Steel Immersed in Aqueous Solution
Rongguang Wang, Yunhui Li, Tian Xiao, Li Cong, Yunhan Ling, Zhaoxia Lu, Chiharu Fukushima, Isao Tsuchitori & Mohammed Bazzaoui
Scientific Reportsvolume 9, Article number: 13094 (2019) (Web Link)

[5] Ahmadi, S., Kord Mostafapour, F. and Bazrafshan, E. (2017) “Removal of Aniline and from Aqueous Solutions by Coagulation/Flocculation–Flotation”, Chemical Science International Journal, 18(3), (Web Link)

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