scholarly journals Fast Potentiometric Analysis of Lead in Aqueous Medium under Competitive Conditions Using an Acridono-Crown Ether Neutral Ionophore

Sensors ◽  
2018 ◽  
Vol 18 (5) ◽  
pp. 1407 ◽  
Author(s):  
Ádám Golcs ◽  
Viola Horváth ◽  
Péter Huszthy ◽  
Tünde Tóth
Keyword(s):  
Crown Ether ◽  
Aqueous Medium ◽  
Neutral Ionophore ◽  
Potentiometric Analysis

Guanidinium-Responsive Crown Ether-Based Macrocyclic Amphiphile in Aqueous Medium

2021 ◽  
pp. 7418-7422
Author(s):  
Tiezheng Pan ◽  
Jiangbo Li ◽  
Bo Li ◽  
Qiangqiang Xu ◽  
Zhiliyu Cui ◽  
...  
Keyword(s):  
Crown Ether ◽  
Aqueous Medium

scholarly journals Comparative extraction studies of potassium phenoxide, p-nitrophenoxide, and picrate into methylene chloride by macrocyclic crown ether and cryptand complexing agents

1984 ◽  
Vol 62 (5) ◽  
pp. 926-930 ◽  
Author(s):  
E. Buncel ◽  
H. S. Shin ◽  
R. A. B. Bannard ◽  
J. G. Purdon
Keyword(s):  
Crown Ether ◽  
Aqueous Medium ◽  
Phase Transfer Catalysis ◽  
Methylene Chloride ◽  
Phase Transfer ◽  
Equilibrium Constants ◽  
Complexing Agents ◽  
Extraction Study

The results of a comparative extraction study of potassium phenoxide, p-nitrophenoxide, and picrate, from aqueous medium into methylene chloride in the presence of crown ether and cryptand complexing agents, are reported. The efficiency of extraction varies extremely widely with the nature of the anion and the ligand. An analysis of the results in terms of constituent equilibrium constants, and the factors which influence these, is presented. The significance of the results to other areas including phase transfer catalysis is pointed out.

Rheological behaviour of the condensed suspension of fluorinated montmorillonite “rassoul” particles in aqueous medium

2005 ◽  
Vol 123 ◽  
pp. 341-344
Author(s):  
A. Khaldoun ◽  
F. González-Caballero ◽  
J. G. López-Durán ◽  
N. Mahrach ◽  
M. L. Kerkeb
Keyword(s):  
Aqueous Medium ◽  
Rheological Behaviour

Changes of Magnetic Characteristics of iron Oxides and Hydroxides in Aqueous Medium

2017 ◽  
Vol 39 (1) ◽  
pp. 46-52
Author(s):  
T. SAVCHENKO ◽  
◽  
A. GRECHANOVSKY ◽  
A. BRIK ◽  
N. DUDCHENKO
Keyword(s):  
Aqueous Medium ◽  
Iron Oxides ◽  
Magnetic Characteristics

Surface interaction of sweet potato peels (Ipomoea batata) with Cd(II) and Pb(II) ions in aqueous medium

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aqueous Medium ◽  
Sweet Potato ◽  
Adsorption Process ◽  
Low Cost ◽  
Correlation Coefficients ◽  
Order Kinetic ◽  
Thermodynamic Evaluation ◽  
Dissociative Mechanism ◽  
Pseudo Second Order ◽  
Potato Peels

The removal of Cd(II) and Pb(II) ions from aqueous medium was studied using potato peels biomass. The adsorption process was evaluated using Atomic Absorption Spectrophotometer (AAS). The Vibrational band of the potato peels was studied using Fourier Transform Infrared Spectroscopy (FTIR). The adsorption process was carried out with respect to concentration, time, pH, particle size and the thermodynamic evaluation of the process was carried at temperatures of 30, 40, 50 and 60(0C), respectively. The FTIR studies revealed that the potato peels was composed of –OH, -NH, –C=N, –C=C and –C-O-C functional groups. The optimum removal was obtained at pH 8 and contact time of 20 min. The adsorption process followed Freundlich adsorption and pseudo second-order kinetic models with correlation coefficients (R2) greater than 0.900. The equilibrium adsorption capacity showed that Pb(II) ion was more adsorbed on the surface of the potato peels biomass versus Cd (II) ion (200.91 mg/g > 125.00 mg/g). The thermodynamic studies indicated endothermic, dissociative mechanism and spontaneous adsorption process. This study shows that sweet potato peels is useful as a low-cost adsorbent for the removal of Cd(II) and Pb(II) ions from aqueous medium.

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