Effects of Different Nitrogen Sources on the Formation of Biogenic Jarosite

Haitao Huang, Weitong Hu, Xiang Zi, Xiaomeng Wang, Jianru Liang and Lixiang Zhou ()
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Haitao Huang: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Weitong Hu: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Xiang Zi: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Xiaomeng Wang: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Jianru Liang: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Lixiang Zhou: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China

Sustainability, 2023, vol. 15, issue 22, 1-14

Abstract: The effects of nitrogen sources on the biosynthesis of jarosite were investigated by analyzing the changes in pH, Fe 2+ , total Fe (TFe), and jarosite production in a 9K culture medium containing different nitrogen sources. Three nitrogen sources, namely (NH 4 ) 2 SO 4 , carbamide (CO(NH 2 ) 2 ), and NH 4 NO 3 , were used in this study. The solution’s pH and Fe 2+ concentrations were set to 2.5 and 160 mmol/L, respectively. The results demonstrated that the three different nitrogen sources could be used by Acidithiobacillus ferrooxidans ( A. ferrooxidans ) LX5, but the degree of utilization differed. The addition of (NH 4 ) 2 SO 4 facilitated the growth of A. ferrooxidans LX5 compared with the other two nitrogen sources, while the bacterial activity in the CO(NH 2 ) 2 set was minimum. The pH of the solution had an inverse correlation with bacterial activity. The mineralization rate using (NH 4 ) 2 SO 4 as the nitrogen source was 42.48%, which was slightly higher than the rates obtained with CO(NH 2 ) 2 and NH 4 NO 3 (31.67% and 35.35%, respectively). The resulting minerals showed a different appearance and chemical composition. However, the XRD spectra showed similar chemical structure. The jarosites were identified as a mixture of jarosite, ammonioiarosite, and carphosiderite.

Keywords: Acidithiobacillus ferrooxidans; nitrogen sources; jarosite; biological mineralization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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