Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites
This paper presents the laboratory study results of the hydrothermal synthesis of compounds structurally related to the jarosite group, which is characterized by basic iron sulfate AFe<sub>3</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub> as the main...
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2024-12-01
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| author | Olga Cheremisina Roman Vasiliev Aleksei Fedorov |
| author_facet | Olga Cheremisina Roman Vasiliev Aleksei Fedorov |
| author_sort | Olga Cheremisina |
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| description | This paper presents the laboratory study results of the hydrothermal synthesis of compounds structurally related to the jarosite group, which is characterized by basic iron sulfate AFe<sub>3</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub> as the main structural component containing A<sup>+</sup> cations such as K<sup>+</sup>, Ag<sup>+</sup>, and NH<sub>4</sub><sup>+</sup>. The synthesis process involves preparing the initial model solution using soluble salts of the studied metals, either jointly or individually. The resulting solution is then processed in a sealed vessel (autoclave) at a temperature exceeding 100 °C. This study was conducted within a temperature range of 105–200 °C, with experiment durations varying and a maximum dwell time of 300 min. The zero-time value was defined as the moment the autoclave reached the required temperature. It was observed that adding potassium salts to the solution during hydrothermal synthesis reduced the amount of silver precipitated as argentojarosite. An increase in process temperature from 105 °C to 200 °C resulted in a rise in silver precipitation, from 35% to 69%. The equilibrium constants of the reactions involved in the precipitation of specific jarosite group compounds were calculated, and the reaction order was determined. |
| format | Article |
| id | doaj-art-2bb69562b69b47099db8b2a11ecf6340 |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-12-01 |
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| spelling | doaj-art-2bb69562b69b47099db8b2a11ecf63402025-01-24T13:41:26ZengMDPI AGMetals2075-47012024-12-011512410.3390/met15010024Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of ArgentojarositesOlga Cheremisina0Roman Vasiliev1Aleksei Fedorov2Department of Physical Chemistry, Faculty of Mineral Processing, Empress Catherine II Saint Petersburg Mining University, 199106 St. Petersburg, RussiaDepartment of Metallurgy, Faculty of Mineral Processing, Empress Catherine II Saint Petersburg Mining University, 199106 St. Petersburg, RussiaDepartment of Metallurgy, Faculty of Mineral Processing, Empress Catherine II Saint Petersburg Mining University, 199106 St. Petersburg, RussiaThis paper presents the laboratory study results of the hydrothermal synthesis of compounds structurally related to the jarosite group, which is characterized by basic iron sulfate AFe<sub>3</sub>(SO<sub>4</sub>)<sub>2</sub>(OH)<sub>6</sub> as the main structural component containing A<sup>+</sup> cations such as K<sup>+</sup>, Ag<sup>+</sup>, and NH<sub>4</sub><sup>+</sup>. The synthesis process involves preparing the initial model solution using soluble salts of the studied metals, either jointly or individually. The resulting solution is then processed in a sealed vessel (autoclave) at a temperature exceeding 100 °C. This study was conducted within a temperature range of 105–200 °C, with experiment durations varying and a maximum dwell time of 300 min. The zero-time value was defined as the moment the autoclave reached the required temperature. It was observed that adding potassium salts to the solution during hydrothermal synthesis reduced the amount of silver precipitated as argentojarosite. An increase in process temperature from 105 °C to 200 °C resulted in a rise in silver precipitation, from 35% to 69%. The equilibrium constants of the reactions involved in the precipitation of specific jarosite group compounds were calculated, and the reaction order was determined.https://www.mdpi.com/2075-4701/15/1/24silverargentojarositehydronium jarositejarositePOXhydrothermal synthesis |
| spellingShingle | Olga Cheremisina Roman Vasiliev Aleksei Fedorov Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites Metals silver argentojarosite hydronium jarosite jarosite POX hydrothermal synthesis |
| title | Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites |
| title_full | Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites |
| title_fullStr | Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites |
| title_full_unstemmed | Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites |
| title_short | Effect of Potassium Salt Addition on Silver Precipitation During Hydrothermal Synthesis of Argentojarosites |
| title_sort | effect of potassium salt addition on silver precipitation during hydrothermal synthesis of argentojarosites |
| topic | silver argentojarosite hydronium jarosite jarosite POX hydrothermal synthesis |
| url | https://www.mdpi.com/2075-4701/15/1/24 |
| work_keys_str_mv | AT olgacheremisina effectofpotassiumsaltadditiononsilverprecipitationduringhydrothermalsynthesisofargentojarosites AT romanvasiliev effectofpotassiumsaltadditiononsilverprecipitationduringhydrothermalsynthesisofargentojarosites AT alekseifedorov effectofpotassiumsaltadditiononsilverprecipitationduringhydrothermalsynthesisofargentojarosites |