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In this study, Fe3 and NH4 reaction of ammonium jarosite as a basic principle , to explore the ammonium jarosite formation conditions , in this build based on conditions were investigated pH, temperature, ferric sulfate dosage, reaction time, ammonia initial concentration of seed investment Canada and other parameters on the use of ammonium sulfate to remove the impact of artificial wastewater , also studied tannery wastewater and garbage removal of ammonia nitrogen leaching factors affecting the results of its optimal reaction conditions , but also on ammonium jarosite formation mechanism was studied . The results showed that: ( 1 ) research for artificial water distribution results when the reaction pH value 1.3, NH3-N concentration of 2800mg / L, ferric sulfate dosage is n [Fe2 (SO4) 3]: n [(NH4) 2SO4] = 4:1 , adding 0.5g seed , the reaction 8h, available NH3-N removal rate was 82.1% , the residual NH3-N concentration of 501mg / L; when the solution pH value between 1.2-1.4 , ammonia removal higher rate ; as the reaction temperature, the ammonia removal is also rising , the temperature at 80 ℃ ~ 90 ℃ is better ; increase iron ions can contribute to the formation of ammonium jarosite , improve nitrogen removal from pharmaceutical removal of both consumption and consider the appropriate amount of ferric sulfate n [Fe2 (SO4) 3]: n [(NH4) 2SO4] = 4-6:1; reaction time help to improve nitrogen removal , suitable reaction time is 6-8h; when the solution was added a small amount of seed crystal , can significantly speed up the reaction rate. ( 2 ) using the method of landfill leachate treatment, the NH3-N concentration of 1408mg / L, the results show that when the pH value of 1.3 , the reaction temperature is 80 ℃, ferric sulfate dosage is n [Fe3]: n [NH4 ] = 5:1 , reaction time 8h, 0.5g seed dosing conditions, the removal rate was 70 % and the residual NH3-N concentration of 422mg / L. ( 3 ) using the method of the leather waste water treatment, the NH3-N concentration of 710mg / L, the results show that when the pH value of 1.2 , the reaction temperature is 80 ℃, the amount of ferric sulfate n [Fe3]: n [NH4] = 5:1 , reaction time of 8h, 0.5g seed dosing conditions, the removal rate was 72 % and the residual NH3-N concentration of 199mg / L. ( 4 ) for the color change during the reaction , the reaction is divided into five phases , the use of sediment quality changes and XRD analysis , may be inferred ammonium jarosite formation reaction mechanism . The generation of ammonium jarosite may Fe (OH) 3 or FeSO4 begins with Fe (OH) SO4 , and [Fe (OH) 2] 2SO4 as a precursor in the reaction , through a series of reaction.
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