Comparative study on the water uptake kinetics and dehumidification performance of silica gel and aluminophosphate zeolites coatings

Energy ◽  
2021 ◽  
pp. 122957
Author(s):  
Lin Liu ◽  
Mitsuhiro Kubota ◽  
Jun Li ◽  
Hayato Kimura ◽  
Yu Bai ◽  
...  
Keyword(s):  
Comparative Study ◽  
Silica Gel ◽  
Water Uptake ◽  
Uptake Kinetics ◽  
Water Uptake Kinetics

Leaching of Bituminized Waste Products (BWP) by Pure Water: The Contribution of NMR Techniques for the Investigation of the Porous Layer

2009 ◽  
Vol 1193 ◽  
Author(s):  
S. Le Feunteun ◽  
O. Diat ◽  
A. Guillermo ◽  
A. Ledieu ◽  
A. Poulesquen
Keyword(s):  
Water Uptake ◽  
Porous Layer ◽  
Pure Water ◽  
Relaxation Times ◽  
Uptake Kinetics ◽  
Water Infiltration ◽  
Waste Products ◽  
The Matrix ◽  
Nmr Techniques ◽  
Water Uptake Kinetics

AbstractThe aim of this study is to improve the understanding of the water infiltration within Bituminized Waste Products (BWP) and the associated phenomena such as the development of the porous layer, the matrix swelling or the water uptake kinetics. Two sets of leaching experiments have been performed on synthesized model samples that are constituted by inactive soluble and/or insoluble salts (40% wt) embedded in bitumen. Large samples were used to quantify the water uptake kinetics and to control the macroscopic swelling of the matrixes during experiments. Smaller samples were used to characterize the depth distribution of the infiltrated water and its motion properties by NMR techniques (1H-T1 relaxation times and 1D-NMR imaging). These techniques enabled us to study the influence of the matrix chemical composition on the water advance in depth as a function of the leaching time. Results show that insoluble salts have a significant influence on water transport while soluble salts entail the development of large porosities. Preliminary results obtained with an original method based on the measurement of NMR relaxation times along the water concentration in depth are presented. They illustrate the great potential of the approach to further improve our knowledge on the establishment of the aqueous network.

Water uptake kinetics in anti-corrosion organic films with a high resolution microbalance oscillator sensor

2010 ◽  
Vol 144 (2) ◽  
pp. 443-449 ◽  
Author(s):  
L. Rodriguez-Pardo ◽  
A. Cao-Paz ◽  
J. Fariña ◽  
A. Covelo ◽  
X.R. Nóvoa ◽  
...  
Keyword(s):  
High Resolution ◽  
Water Uptake ◽  
Uptake Kinetics ◽  
Organic Films ◽  
Water Uptake Kinetics

Quaternary polymethacrylate–magnesium aluminum silicate films: Water uptake kinetics and film permeability

2015 ◽  
Vol 490 (1-2) ◽  
pp. 165-172 ◽  
Author(s):  
Thitiphorn Rongthong ◽  
Srisagul Sungthongjeen ◽  
Florence Siepmann ◽  
Juergen Siepmann ◽  
Thaned Pongjanyakul
Keyword(s):  
Water Uptake ◽  
Uptake Kinetics ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate ◽  
Water Uptake Kinetics

scholarly journals Water uptake kinetics in soaking of grass pea

2021 ◽  
Author(s):  
Rui COSTA ◽  
Verónica PEDROSO ◽  
Tiago MADEIRA ◽  
João GÂNDARA
Keyword(s):  
Water Uptake ◽  
Uptake Kinetics ◽  
Grass Pea ◽  
Water Uptake Kinetics

Quantitative Fluorodensitometric Measurement of Aflatoxin B1 with a Flying-Spot Densitometer. II. Comparative Study of B1 Measurements in Spiked and Naturally Contaminated Peanut Products

1972 ◽  
Vol 55 (6) ◽  
pp. 1310-1315
Author(s):  
P R Beljaars ◽  
F H M Fabry ◽  
M M A Pickott ◽  
M J Peeters
Keyword(s):  
Comparative Study ◽  
Silica Gel ◽  
Aflatoxin B1 ◽  
Peanut Butter ◽  
Reference Method ◽  
Amyl Alcohol ◽  
The Other ◽  
Coefficients Of Variation ◽  
Tlc Plates ◽  
Flying Spot

Abstract Peanut butter extracts and samples spiked with 5-40 μg anatoxin B1/kg were analyzed, together with naturally contaminated peanut products, by 3 extraction procedures: the official Dutch method (KB), he Liem et al. method (methanol), and the IUPAC method. The last procedure was selected as a reference method, since it has international application. KB extracts were separated on silica gel G plates with a mixture of chloroform-acetone (90 + 10), whereas IUPAC extracts were separated similarly on MN-G-HR plates. Methanol extracts were resolved on silica gel II plates, using chloroform-trichloroethylene-n-amyl alcohol-formic acid (80 + 15 + 4 + 1) as the developing solvent. After development, plates were scanned with a reflectance flying-spot densitometer. With such techniques, average recoveries for spiked peanut butter extracts ranged from 99 to 105%, with variation values of 11-12%. Recovery values of 69% (KB method) and 84% (methanol and IUPAC methods) were obtained for spiked peanut butter samples. Coefficients of variation ranged from 13 to 15% for fluorodensitometric measurements. Innaturally contaminated peanuts and peanut products , precision values were 13.6% for fluorodensitometric measurements compared to 36% for visual estimations . Both the methanol and IUPAC methods yield extracts suitable for densitometric analysis after spotting on TLC plates; the analytical results obtained are comparable. Extracts from the KB method contained more interfering fluorescent material than the other 2 methods

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