Effect of temperature and pH values on aggregation behavior of polymeric surfactants in aqueous solution

2005 ◽  
Vol 98 (3) ◽  
pp. 945-949 ◽  
Author(s):  
Ya Cao ◽  
Huilin Li
Keyword(s):  
Aqueous Solution ◽  
Aggregation Behavior ◽  
Effect Of Temperature ◽  
Polymeric Surfactants ◽  
Ph Values

scholarly journals Removal of chromium (VI) in aqueous solution by oat biomass (Avena sativa)

2017 ◽  
Vol 2 (2) ◽  
pp. 196-205
Author(s):  
Nancy Cecilia Pacheco-Castillo ◽  
Juan Fernando Cárdenas-González ◽  
María de Guadalupe Moctezuma Zarate ◽  
Víctor Manuel Martínez-Juárez ◽  
Adriana Rodríguez-Pérez ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Avena Sativa ◽  
Industrial Wastewater ◽  
Metal Removal ◽  
Effect Of Temperature ◽  
Ph Values ◽  
Chromium Vi ◽  
Removal Capacity ◽  
Oat Biomass

Chromium (VI) removal capacity in aqueous solution by oat biomass was analyzed by the diphenylcarbazide method. Bioadsorption was evaluated at different pH values (1, 2, 3 and 4) and at different times. The effect of temperature in the range of 28 °C to 60 °C and the removal at different initial Cr (VI) concentrations of 200 to 1000 mg/L were also studied. The highest bioadsorption (100% with 100 mg/L of the metal and 1 g of biomass) was at 8 h, at pH of 1.0 and 28 °C. With regard to temperature, the highest removal was to 60 oC, with a 100% removal at 90 min. Removal was more efficient when higher concentrations of biomass were used (100%, 3 h and 5 g of biomass). Untreated biomass (washed and ground biomass) showed excellent metal removal capacity in situ, 82.6% and 85.3% removal in contaminated soil and water, respectively, after 10 days of incubation, using 25 g of the biomass (100 mL of water). These results show that Cr (VI) can be removed from industrial wastewater using oat biomass.

Temperature Effect on the Two-Dimensional Phase Transition Kinetics of Adenine Adsorbed at the Hg Electrode/Aqueous Solution Interface

2003 ◽  
Vol 68 (8) ◽  
pp. 1407-1419 ◽  
Author(s):  
Claudio Fontanesi ◽  
Roberto Andreoli ◽  
Luca Benedetti ◽  
Roberto Giovanardi ◽  
Paolo Ferrarini
Keyword(s):  
Phase Transition ◽  
Aqueous Solution ◽  
Phase Change ◽  
Temperature Effect ◽  
Transition Rate ◽  
Effect Of Temperature ◽  
Two Dimensional ◽  
Solution Interface ◽  
Phase Transition Kinetics ◽  
Kinetics Of

The kinetics of the liquid-like → solid-like 2D phase transition of adenine adsorbed at the Hg/aqueous solution interface is studied. Attention is focused on the effect of temperature on the rate of phase change; an increase in temperature is found to cause a decrease of transition rate.

scholarly journals Double-Cross-Linked Networks Based on Methacryloyl Mucin

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1706
Author(s):  
Elena Olăreț ◽  
Brîndușa Bălănucă ◽  
Andra Mihaela Onaș ◽  
Jana Ghițman ◽  
Horia Iovu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aqueous Solution ◽  
Chemical Modification ◽  
Structural Modification ◽  
Aqueous Media ◽  
Cross Linking ◽  
Ph Values ◽  
Acid Aqueous Solution ◽  
Reaction Media ◽  
Double Cross

Mucin is a glycoprotein with proven potential in the biomaterials field, but its use is still underexploited for such applications. The present work aims to produce a synthesis of methacryloyl mucin single-network (SN) hydrogels and their double-cross-linked-network (DCN) counterparts. Following the synthesis of the mucin methacryloyl derivative, various SN hydrogels are prepared through the photopolymerization of methacrylate bonds, using reaction media with different pH values. The SN hydrogels are converted into DCN systems via supplementary cross-linking in tannic acid aqueous solution. The chemical modification of mucin is described, and the obtained product is characterized; the structural modification of mucin is assessed through FTIR spectroscopy, and the circular dichroism and the isoelectric point of methacryloyl mucin is evaluated. The affinity for aqueous media of both SN and DCN hydrogels is estimated, and the mechanical properties of the systems are assessed, both at macroscale through uniaxial compression and rheology tests and also at microscale through nanoindentation tests.

Determination and correlation of solubility of thiamine nitrate in water+ethanol mixtures and aqueous solution with different pH values from 278.15K to 303.15K

2015 ◽  
Vol 400 ◽  
pp. 53-61 ◽  
Author(s):  
Haisheng Wang ◽  
Yujia Qin ◽  
Dandan Han ◽  
Xiaona Li ◽  
Yan Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ph Values

Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution

Langmuir ◽  
2010 ◽  
Vol 26 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Yanbo Hou ◽  
Yuchun Han ◽  
Manli Deng ◽  
Junfen Xiang ◽  
Yilin Wang
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactant ◽  
Aggregation Behavior
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