Nature and dynamics of the luminescence of uranyl salt crystals

1981 ◽  
Vol 34 (4) ◽  
pp. 417-421
Author(s):  
E. F. Titkov ◽  
A. P. Zazhogin
Keyword(s):  
Salt Crystals ◽  
Uranyl Salt

New results on the dynamics of Rochelle salt crystals (a system with a "double" critical point)

1986 ◽  
Vol 149 (6) ◽  
pp. 331 ◽  
Author(s):  
A.A. Volkov ◽  
Georgii V. Kozlov ◽  
E.B. Kryukova ◽  
A.A. Sobyanin
Keyword(s):  
Critical Point ◽  
Rochelle Salt ◽  
Salt Crystals ◽  
Double Critical Point

scholarly journals Separation and Recycling of Concentrated Heavy Metal Wastewater by Tube Membrane Distillation Integrated with Crystallization

Membranes ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 19 ◽  
Author(s):  
Xiang-Yang Lou ◽  
Zheng Xu ◽  
An-Ping Bai ◽  
Montserrat Resina-Gallego ◽  
Zhong-Guang Ji
Keyword(s):  
Heavy Metal ◽  
Membrane Fouling ◽  
Pure Water ◽  
Sharp Decrease ◽  
Membrane Distillation ◽  
Water Yield ◽  
Mixed System ◽  
Mixed Solutions ◽  
Membrane Flux ◽  
Salt Crystals

Tube membrane distillation (MD) integrated with a crystallization method is used in this study for the concurrent productions of pure water and salt crystals from concentrated single and mixed system solutions. The effects of concentrated Zn2+ and Ni2+ on performance in terms of membrane flux, permeate conductivity, crystal recovery rates, and crystal grades are investigated. Preferred crystallization and co-crystallization determinations were performed for mixed solutions. The results revealed that membrane fluxes remained at 2.61 kg·m−2·h−1 and showed a sharp decline until the saturation increased to 1.38. Water yield conductivity was below 10 μs·cm−1. High concentrated zinc and nickel did not have a particular effect on the rejection of the membrane process. For the mixed solutions, membrane flux showed a sharp decrease due to the high saturation, while the conductivity of permeate remained below 10 μs·cm−1 during the whole process. Co-crystallization has been proven to be a better method due to the existence of the SO42− common-ion effect. Membrane fouling studies have suggested that the membrane has excellent resistance to fouling from highly concentrated solutions. The MD integrated with crystallization proves to be a promising technology for treating highly concentrated heavy metal solutions.

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