INFLUENCE OF SALT CONTENT IN MINERALIZED WATERS ON THE EXPENDITURE OF OXIDIZERS WHEN PRODUCING IODINE FROM UNDERGROUND SALT WATERS

Umbarov I.A., Turaev H.Kh., Xamzaev N.J. and Eshonqulov H.N. Termez State University, Termez, Uzbekistan. ...................................................................................................................... Manuscript Info Abstract ......................... ........................................................................ Manuscript History Received: 03 October 2019 Final Accepted: 05 November 2019 Published: December 2019

Natural deposits containing iodine, bromine and other valuable components are objects for their industrial production. The latter include natural water (thermal), drilling water (associated oil), sea water and ocean water, as well as saltpeter deposits (Chile, Peru). A number of industrial iodine-containing groundwater has been discovered on the territory of our republic, located mainly in the Ferghana, Bukhara-Karshi and Surkhandarya artesian basins and on the Ustyurt plateau [1]. Experimental part. The object of this research work is the thermal waters of the Surkhandarya region, in particular, the Kattakum-2 well of the Khudag field, Uchkyzyl, Kokait and Urtabulok of the Bukhara-Karshi Depression. The data obtained are shown in table 1.

Results and its Discussion:-
The table shows that the iodine content in the waters of the Surkhandarya basin ranges from 17.4-24.34 mg / l, and bromine 313.2-426.4 mg / l, at a pH of 5.1-6.7, and a temperature of 39 -76 ° C, and mineralization 142.9-283.0 g / l depending on the field. Based on the results of our studies (Table 1), we came to the conclusion that the most promising for the extraction of iodine are the Urtabulak and Khaudag (Kattakum-2) deposits.
The relationship between the consumption of oxidizing agents and the amount of salts during the separation of iodine from mineralized waters for the deposits of Urtabulak, Kokaity, Khaudag and Uchkyzyl was also studied. For the complete oxidation of iodine compounds from iodine-containing test waters, the required amount of a solution of oxidizing agents and sulfuric acid depends on the salinity of the water. The results of experimental studies are shown in table 2. According to the data obtained, the mineralization of the Urtabulak deposit is 113 g / l and 0.132 ml of 2% sulfuric acid is consumed to acidify 50 ml of the studied waters. Also, the consumption of solutions of the used oxidizing agents is associated with the consumption of sulfuric acid in stoichiometric ratios, respectively, as follows: 2% The mineralization of the Kokait deposit is 142 g / l, and 0.166 ml of 2% sulfuric acid is consumed to acidify 50 ml of the test water. Also, the consumption of solutions of the used oxidizing agents is associated with the consumption of sulfuric acid in stoichiometric ratios, respectively, as follows: 2% Na2S2O8 -0.29 ml; 2% Ca(C1O)2 -0.225 ml; 2% NaNO2 -0.175 ml; 5% H2O2 -0.124 ml.
The mineralization of the Khaudag deposit is 210 g / l, and 0.245 ml of 2% sulfuric acid is consumed to acidify 50 ml of the studied water. Also, the consumption of solutions of the used oxidizing agents is associated with the consumption of sulfuric acid in stoichiometric ratios as follows: 2% Na2S2O8 -0.370 ml; 2% Ca(C1O)2 -0.287 ml; 2% NaNO2 -0.223 ml; 5% H2O2 -0.138 ml.
The mineralization of the Uchkyzyl deposit is 283 g / l, and 0.330 ml of 2% sulfuric acid is consumed to acidify 50 ml of the studied waters. Also, the consumption of solutions of the used oxidizing agents is associated with the consumption of sulfuric acid in stoichiometric ratios, respectively, as follows: 2% Na2S2O8 -0.550 ml; 2% Ca(C1O)2 -0.450 ml; 2% NaNO2 -0.350 ml; 5% H2O2 -0.225 ml.
Thus, it was found that with an increase in the salinity of underground hydrothermal waters of the studied deposits from 113 g / l to 283 g / l, the flow rate of the amount of a solution of oxidizing agents and sulfuric acid increases proportionally.

Conclusions:-
1. Based on the results of our studies (Table 1), we came to the conclusion that the most promising for the extraction of iodine are the Urtabulak and Khaudag (Kattakum-2) deposits. 2. It has been proved that the increase in the salinity of underground hydrothermal waters in the Kattakum-2, Uchkizyl, Kokait and Urtabulak deposits when iodine is separated from iodine-containing compounds from 113 g / l to 283 g / l is proportional to the flow rate of the solution of oxidizing agents and sulfuric acid, that is, the consumption of oxidizing agents increases by 2.5 times, and sulfuric acid by 1.5 times.