scholarly journals Whey desalination using polymer and inorganic membranes: Operation conditions

2018 ◽  
pp. 103-115 ◽  
Author(s):  
Valerii Myronchuk ◽  
Yurii Zmievskii ◽  
Yuliya Dzyazko ◽  
Ludmila Rozhdestvenska ◽  
Vladimir Zakharov
Keyword(s):  
Ion Transport ◽  
Zirconium Dioxide ◽  
Cheese Whey ◽  
Acidic Solution ◽  
Inorganic Membranes ◽  
Operation Conditions ◽  
Hydrated Zirconium Dioxide ◽  
Mineral Components ◽  
Hydrated Zirconium ◽  
Overlimiting Current

Electrodialytic desalination of cheese whey was carried out using a pair of polymer cation exchange (Nafion 117) and inorganic membranes. The ceramic separator was modified with nanocomposite containing hydrated zirconium dioxide and basic bismuth nitrate. This amphoteric filler provides anion exchange ability of the composite membrane. This property is realized when at least one side of the membrane is in contact with an acidic solution. Ion transport through the membranes was shown to be determined by current, whey acidity, and also by composition of the solution in the concentration compartment of the electrochemical cell. It was shown that whey desalination occurred under overlimiting current. Acidification of whey and decrease of the acid content in the concentrate suppress ion transport. The electrodialysis of whey and nanofiltration permeate allowed removal of up to 80% of the mineral components in 5 h and 40 min, respectively. Preliminary ozonation of the permeate increased the rate of desalination.

scholarly journals Composite inorganic membranes containing nanoparticles of hydrated zirconium dioxide for electrodialytic separation

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Yuliya S Dzyazko ◽  
Yurii M Volfkovich ◽  
Valentin E Sosenkin ◽  
Nadejda F Nikolskaya ◽  
Yurii P Gomza
Keyword(s):  
Zirconium Dioxide ◽  
Inorganic Membranes ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium

scholarly journals Electrodialytic whey demineralization involving polymer-inorganic membranes, anion exchange resin and graphene-containing composite

2019 ◽  
pp. 163-171 ◽  
Author(s):  
Valerii Myronchuk ◽  
Yurii Zmievskii ◽  
Yuliya Dzyazko ◽  
Ludmila Rozhdestveska ◽  
Vladimir Zakharov ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Zirconium Dioxide ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Limiting Current ◽  
Inorganic Membranes ◽  
Hydrated Zirconium Dioxide ◽  
Electrodialysis Cell ◽  
Mineral Components ◽  
Exchange Resins

Electrodialysis of cheese whey was performed using polymer membranes modified with zirconium hydrophosphate (cation exchange separator) and hydrated zirconium dioxide (anion exchange material). Both neutral and acidic solutions were used as a concentrate. As found, a 0.1 M HCl solution is preferable: the current efficiency towards mineral components and desalination degree reach 75-81 % and 90 % respectively, when the current does not exceed limiting current for cations. Anion exchange resin, as well as the composite containing zirconium dioxide and oxidized graphene, were involved in desalination. The composite adsorbs preferably cations, adsorption of anions is depressed. Its adsorption capacity is 1.2 (K+) and 0.25 (CL-) mmol g-1. Whey passed subsequently through the electrodialysis cell and beds of these materials. This approach allowed us to achieve the demineralization degree of 99%, and minimize losses of organic substances. Adsorption materials can be used repeatedly. The advantage of the composite over ion exchange resins is facile regeneration.

scholarly journals MEMBRANES MODIFIED BY NANOCOMPOSITES OF HYDRATED ZIRCONIUM DIOXIDE AND OXIDIZED GRAPHENE

2020 ◽  
Vol 86 (4) ◽  
pp. 91-107
Author(s):  
Liudmyla Rozhdestvenskaya ◽  
Kateryna Kudelko ◽  
Volodymyr Ogenko ◽  
Alexandr Bildyukevich ◽  
Tatiana Plisko ◽  
...  
Keyword(s):  
Active Layer ◽  
Ion Exchanger ◽  
Protein Solutions ◽  
Inorganic Membranes ◽  
Organic Substances ◽  
Permeate Flux ◽  
Inorganic Ion ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium ◽  
Na Ions

Organo-inorganic membranes were obtained by impregnating ultrafiltration membranes with a composite modifier - zirconium (IV) hydroxide, containing oxidized graphene (0.5 wt.%). The modifier was precipitated in the active layer of the membrane, thus forming a "secondary active layer". The layer thickness calculated according to the Kozeny-Carman equation is 0.66-1.38 μm. A thinner layer is formed in the membrane with smaller pore size. The diffusion coefficients of Li+ and Na+ ions were found. The effect of the modifier on the retention ability relative to hardness ions (10-14%) and to protein compounds (95-98%) during filtration is determined. Mathematical modeling of the dependence of the permeate flux via time showed that the presence of ion exchanger particles in the polymer active layer prevents the accumulation of organic substances in the pores. Therefore, only the outer surface of the membrane is contaminated, and the precipitate can be easily removed mechanically. It was shown that insertion of a carbon component into pores of the membranes, in addition to the inorganic ion-exchangers, is advisable only in the case of a finely porous active layer. In particular, the performance of the initial polymer membrane (20 dm3/m3.h)) and the selectivity to the calibration substance with a molecular weight of 40 kDa (99%) serve as expediency criteria. In comparison with a membrane modified only with inorganic ion exchanger, selectivity is increased, the rate of filtration of protein solutions is higher, and resistance to contamination by organic substances is achieved. The results are discussed from the view of the hydrophobic-hydrophilic properties of oxidized graphene.

scholarly journals Ceramic anion-exchange membranes based on microporous supports infiltrated with hydrated zirconium dioxide

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46348-46358 ◽  
Author(s):  
M. C. Martí-Calatayud ◽  
M. García-Gabaldón ◽  
V. Pérez-Herranz ◽  
S. Sales ◽  
S. Mestre
Keyword(s):  
Anion Exchange ◽  
Zirconium Dioxide ◽  
Industrial Effluents ◽  
Anion Exchange Membranes ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium

Anion-exchange membranes were produced by infiltrating microporous ceramic supports with particles of hydrated ZrO2. These membranes can be applied to the electrodialytic treatment of harsh industrial effluents.

Anion-exchange properties of composite ceramic membranes containing hydrated zirconium dioxide

2006 ◽  
Vol 79 (5) ◽  
pp. 769-773 ◽  
Author(s):  
Yu. S. Dzyaz’ko ◽  
V. N. Belyakov ◽  
N. V. Stefanyak ◽  
S. L. Vasilyuk
Keyword(s):  
Anion Exchange ◽  
Zirconium Dioxide ◽  
Composite Ceramic ◽  
Ceramic Membranes ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium ◽  
Exchange Properties

Organic-inorganic sorbents containing hydrated zirconium dioxide for removal of chromate anions from diluted solutions

2019 ◽  
Vol 6 ◽  
pp. 260-269 ◽  
Author(s):  
Yu. Dzyazko ◽  
E. Kolomyets ◽  
Yu. Borysenko ◽  
V. Chmilenko ◽  
I. Fedina
Keyword(s):  
Zirconium Dioxide ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium

Mesostructure of xerogels of hydrated zirconium dioxide

JETP Letters ◽  
2007 ◽  
Vol 85 (2) ◽  
pp. 122-126 ◽  
Author(s):  
G. P. Kopitsa ◽  
V. K. Ivanov ◽  
S. V. Grigoriev ◽  
P. E. Meskin ◽  
O. S. Polezhaeva ◽  
...  
Keyword(s):  
Zirconium Dioxide ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium

Model of Fractal Particles of Hydrated Zirconium Dioxide, Based on Small-Angle Neutron Scattering Data

2019 ◽  
Vol 13 (5) ◽  
pp. 908-913 ◽  
Author(s):  
L. A. Azarova ◽  
G. P. Kopitsa ◽  
E. G. Iashina ◽  
V. M. Garamus ◽  
S. V. Grigoriev
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Zirconium Dioxide ◽  
Scattering Data ◽  
Hydrated Zirconium Dioxide ◽  
Hydrated Zirconium ◽  
Fractal Particles

Sorption recovery of sulfate complexes of iridium on hydrated zirconium dioxide

2006 ◽  
Vol 79 (4) ◽  
pp. 563-567 ◽  
Author(s):  
N. V. Abovskaya ◽  
S. A. Simanova ◽  
E. S. Boichinova ◽  
M. K. Fedorov
Keyword(s):  
Zirconium Dioxide ◽  
Hydrated Zirconium Dioxide ◽  
Sorption Recovery ◽  
Hydrated Zirconium ◽  
Sulfate Complexes
Sign in / Sign up

Export Citation Format

Share Document