Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerIron Removal from Water by Precipitation in Bicarbonated Water: Influence of Crystallization Companions| Abstract

7187379870

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Abstract

Iron Removal from Water by Precipitation in Bicarbonated Water: Influence of Crystallization Companions

Author(s): Yahouza Z, Manzola AS, Amadou H and Laouali MS

Natural waters, especially in the Tahoua region, which are very salty, have a very high concentration of iron. They are the site of a significant precipitation of Fe(OH)3 in the water supply pipes. Ferrhydrite is formed in Dan Daji Illela's waters at 30°C. In order to understand the behavior of natural waters, we studied the influence of ions frequently encountered in them (Ca2+, Mg2+, Cl-, Na+, and SO42-) on the precipitation of iron in a bicarbonate medium. This study will allow us to determine if the addition of a particular ion can modify the behavior of water. Thus we studied the influence of Na+, Cl-, Mg2+, Ca2+ and SO42- ions at 30°C on the polymorphic transformations of Fe(OH)3. The experiments were performed in the bicarbonate medium with a concentration of 488 mg/L, in the presence of 5 mg/L of iron, at pHi (initial pH at the beginning of the experiment) and at room temperature for a precipitation time of 60 min. The Na+ and Cl- ions have no effect on the precipitation of Fe(OH)3 and promote the formation of the three varieties : ferrihydrite, lepidocrocite and goethite. Ca2+, Mg2+ and SO42- ions inhibit the formation of Fe(OH)3. The SO42- ions are directed towards the formation of the three varieties with the predominance of lepidocrocite. Ca2+ ions direct towards the formation of the three varieties with the predominance of goethite. The Mg2+ ions orient towards the formation of the three varieties with the predominance of ferrihydrite.


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