Freezing temperatures of aqueous solutions of methyl formate and ethyl acetate with a variety of nonelectrolytes. Gibbs energy of interaction of the ester group with other functional groups

1986 ◽  
Vol 15 (9) ◽  
pp. 705-715 ◽  
Author(s):  
Sushil K. Suri ◽  
Robert H. Wood
Keyword(s):  
Gibbs Energy ◽  
Aqueous Solutions ◽  
Ethyl Acetate ◽  
Functional Groups ◽  
Methyl Formate ◽  
Ester Group ◽  
Energy Of Interaction ◽  
Freezing Temperatures

Sorption of Lead by the Selective Ion Exchanger Ostsorb DETA

1992 ◽  
Vol 57 (7) ◽  
pp. 1393-1404 ◽  
Author(s):  
Ladislav Svoboda ◽  
Jan Uhlíř ◽  
Zdeněk Uhlíř
Keyword(s):  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Ion Exchanger ◽  
Preconcentration Procedure ◽  
Bead Cellulose

The properties of Ostsorb DETA, a selective ion exchanger based on modified bead cellulose with chemically bonded diethylenetriamine functional groups, were studied, and its applicability to the preconcentration of trace amounts of lead from aqueous solutions was verified. The conditions of the preconcentration procedure in the column and batch modes were optimized for this purpose. The results obtained were applied to the determination of lead in phosphoric acid.

High effective enrichment of U(vi) from aqueous solutions on versatile crystalline carbohydrate polymer-functionalized graphene oxide

2021 ◽  
Vol 50 (39) ◽  
pp. 14009-14017
Author(s):  
Hai Wang ◽  
Renrong Liu ◽  
Huifang Wang ◽  
Baowei Hu ◽  
Muqing Qiu
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Void Ratio ◽  
Functionalized Graphene ◽  
Promising Candidate ◽  
Functionalized Graphene Oxide ◽  
Carbohydrate Polymer ◽  
Environmental Decontamination

The highly effective enrichment of U(vi) on COF/GO was attributed to a huge void ratio and a variety of oxygen-containing functional groups. It could be used as a promising candidate for environmental decontamination and energy storage.

scholarly journals Sorptive removal of phenanthrene from aqueous solutions using magnetic and non-magnetic rice husk-derived biochars

2018 ◽  
Vol 5 (5) ◽  
pp. 172382 ◽  
Author(s):  
Wei Guo ◽  
Shujuan Wang ◽  
Yunkai Wang ◽  
Shaoyong Lu ◽  
Yue Gao
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Rice Husk ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Adsorption Data ◽  
Magnetic Modification ◽  
Pseudo Second Order ◽  
Rice Husk Biochar

A magnetically modified rice husk biochar (MBC) was successfully prepared by a hydrothermal method from original biochar (BC) and subsequently used to remove phenanthrene (PHE) from aqueous solutions. The porosity, specific surface area and hydrophobicity of BC were significantly improved (approx. two times) after magnetic modification. The adsorption data fitted well to pseudo-second-order kinetic and Langmuir models. Compared with BC, MBC had a faster adsorption rate and higher adsorption capacity of PHE. The adsorption equilibrium for PHE on MBC was achieved within 1.0 h. The maximum adsorption capacity of PHE on MBC was 97.6 mg g −1 based on the analysis of the Sips model, which was significantly higher than that of other sources of BCs. The adsorption mechanism of the two BCs was mainly attributed to the action of surface functional groups and π–π-conjugated reactions. The adsorption of PHE on MBC mainly occurred in the functional groups of C–O and Fe 3 O 4 , but that on BC was mainly in the functional groups of –OH, N–H, C=C and C–O.

A Gibbs energy equation for LiBr aqueous solutions

2006 ◽  
Vol 29 (1) ◽  
pp. 36-46 ◽  
Author(s):  
D.S. Kim ◽  
C.A. Infante Ferreira
Keyword(s):  
Gibbs Energy ◽  
Aqueous Solutions ◽  
Energy Equation

THE STUDY OF THE REACTION BETWEEN CHITOSAN AND MELAMINE DERIVATIVE

2020 ◽  
Vol 54 (1 (251)) ◽  
pp. 83-85
Author(s):  
M.L. Yeritsyan ◽  
K.M. Yeritsyan ◽  
V.M. Mavisakalyan ◽  
A.M. Arustamyan ◽  
R.P. Mkhitaryan
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Chitosan Derivative

The reaction between urea and melamine was studied. The reaction resulted in tris-carbamide derivative of melamine. During the reaction between the melamine derivative and the glycoside group of chitosan the sim-triazine functional groups were formed, which are included in the structure of synthesized derivative of chitosan. The synthesized derivative of chitosan was tested. It is recommended to use this chitosan derivative as an absorbent for the separation of heavy metal ions such as Cd2+, Hg1+, Hg2+, Co2+, Ag1+, As3+, As5+, etc. from the aqueous solutions of salts.

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