Sorption and Membrane Technologies for Mine Water Purification

2019 ◽  
Vol 946 ◽  
pp. 621-627
Author(s):  
Konstantin L. Timofeev ◽  
Vasilii Kurdiumov ◽  
Gennady Maltsev
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Water Purification ◽  
Mine Water ◽  
Large Scale ◽  
Potable Water ◽  
Water Hardness ◽  
Membrane Technologies ◽  
Large Scale Tests

The importance of the research is due to the lack of potable water (~1.6 million m3 per year) in a rapidly developing city in the Urals. One way to solve this problem is to purify water from the spent copper mine with a debit of ~4.4 million m3 of water per year. The most advanced techniques recently used for obtaining drinking water of a high quality are based on ion exchange and reverse osmosis, which can ensure an obtainment of water with initial contents of impurities much below the maximum permissible values. Based on the real experience the article compares sorption and membrane technologies in terms of water purification efficiency and cost of potable water production. The large-scale tests of mine water purification were carried out at sorption and reverse osmosis pilot plants with the capacity of 1 m3 per hour for the incoming flow. The source water had the following composition, mg/dm3: 0.5–0.9 Mn; 1.0–1.7 Ni; 80-140 Ca; 30-40 Na; 40-70 Mg; 0.2–0.6 Cu; 8.1–9.5 Si; 0.01–0.03 Zn; 0.01–1.70 Fe; <0.01 Al; < 0.005 As; < 0.005 Pb. At the same time the salinity was 640–680 mg/dm3, the water hardness was 9.5–11.5 mmol/dm3 and pH was 7.0-7.5. The content of non-mentioned impurities was below the detection limit. The resulting treated water met the requirements for the quality of potable water for both purification techniques. It was concluded, that the best option for treatment of mine water is ion exchange.

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

SYNTHESIS AND MAGNETIC PROPERTIES OF PLATELET SHAPE SPINEL AND M-TYPE HEXAGONAL FERRITES PREPARED FROM β'' ALUMINA-LIKE FERRITES BY ION EXCHANGE

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-937-C8-938
Author(s):  
O. Kalogirou ◽  
A. C. Stergiou ◽  
D. Samaras ◽  
S. Nicolopoulos ◽  
A. Bekka ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ion Exchange ◽  
Hexagonal Ferrites ◽  
Platelet Shape

One-step preparative isolation of aristolochic acids by strong ion-exchange centrifugal partition chromatography

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
AA Abdelgadir ◽  
L Boudesocque-Delaye ◽  
I Thery-Koné ◽  
A Gueiffier ◽  
EM Ahmed ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Partition Chromatography ◽  
Centrifugal Partition Chromatography ◽  
Preparative Isolation ◽  
Aristolochic Acids ◽  
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