The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage
The pre-oxidation acid mine drainage(AMD) generated during mining process exhibits a certain degree of acidity and contains a large amount of metal ions and sulfates. Traditional lime neutralization methods not only contribute to environmental pollution, but also cause resource wastage. This study e...
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Editorial Office of Industrial Water Treatment
2025-01-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1195 |
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| author | TAN Dongdong NIE Guanghua DENG Qiang |
| author_facet | TAN Dongdong NIE Guanghua DENG Qiang |
| author_sort | TAN Dongdong |
| collection | DOAJ |
| description | The pre-oxidation acid mine drainage(AMD) generated during mining process exhibits a certain degree of acidity and contains a large amount of metal ions and sulfates. Traditional lime neutralization methods not only contribute to environmental pollution, but also cause resource wastage. This study employed a process involving nanofiltration, reduction, vacuum concentration, and crystallization to treat pre-oxidation AMD and produced magnesium ferrous sulfate crystals. The retention rate of different metal ions during nanofiltration was investigated, and the influence of Fe3+ reduction during the preparation process of magnesium ferrous sulfate were explored, along with the impact of crystallization conditions on crystal purity and yield. The results showed that the retention rate of nanofiltration for all metal ions reached over 93%, and the retention rate for iron and magnesium reached 98%. The optimal Fe3+ reduction effect occurred at pH of 1.0, temperature of 35 ℃, and reaction time of 40 minutes. When the concentration ratio of the mother liquor was 1∶2, the crystallization temperature was 35 ℃, and the stirring rate was 240 r/min, the recovery rates of iron and magnesium in mother liquor were 31.31% and 13.48%, respectively, and the purity of the product could reach more than 98%. Structural analysis of the crystals confirmed that the product was magnesium ferrous sulfate. Compared with the traditional lime neutralization method, this combination process could not only achieve pre-oxidation AMD treatment, but also realize resource recovery of ferrous magnesium sulfate. |
| format | Article |
| id | doaj-art-741accbd73a941baa6dcf94632e1587b |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-741accbd73a941baa6dcf94632e1587b2025-01-24T07:59:03ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2025-01-0145114615210.19965/j.cnki.iwt.2023-11951005-829X（2025）01-0146-07The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainageTAN Dongdong0NIE Guanghua1DENG Qiang2School of Mining Engineering, Guizhou University, Guiyang550025, ChinaSchool of Mining Engineering, Guizhou University, Guiyang550025, ChinaGuizhou Central Laboratory of Geology and Mineral Resources, Guiyang550025, ChinaThe pre-oxidation acid mine drainage(AMD) generated during mining process exhibits a certain degree of acidity and contains a large amount of metal ions and sulfates. Traditional lime neutralization methods not only contribute to environmental pollution, but also cause resource wastage. This study employed a process involving nanofiltration, reduction, vacuum concentration, and crystallization to treat pre-oxidation AMD and produced magnesium ferrous sulfate crystals. The retention rate of different metal ions during nanofiltration was investigated, and the influence of Fe3+ reduction during the preparation process of magnesium ferrous sulfate were explored, along with the impact of crystallization conditions on crystal purity and yield. The results showed that the retention rate of nanofiltration for all metal ions reached over 93%, and the retention rate for iron and magnesium reached 98%. The optimal Fe3+ reduction effect occurred at pH of 1.0, temperature of 35 ℃, and reaction time of 40 minutes. When the concentration ratio of the mother liquor was 1∶2, the crystallization temperature was 35 ℃, and the stirring rate was 240 r/min, the recovery rates of iron and magnesium in mother liquor were 31.31% and 13.48%, respectively, and the purity of the product could reach more than 98%. Structural analysis of the crystals confirmed that the product was magnesium ferrous sulfate. Compared with the traditional lime neutralization method, this combination process could not only achieve pre-oxidation AMD treatment, but also realize resource recovery of ferrous magnesium sulfate.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1195acid mine drainageferrous magnesium sulfateresource utilizationcrystallization |
| spellingShingle | TAN Dongdong NIE Guanghua DENG Qiang The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage Gongye shui chuli acid mine drainage ferrous magnesium sulfate resource utilization crystallization |
| title | The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage |
| title_full | The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage |
| title_fullStr | The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage |
| title_full_unstemmed | The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage |
| title_short | The preparation of magnesium ferrous sulfate from pre-oxidized acid mine drainage |
| title_sort | preparation of magnesium ferrous sulfate from pre oxidized acid mine drainage |
| topic | acid mine drainage ferrous magnesium sulfate resource utilization crystallization |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1195 |
| work_keys_str_mv | AT tandongdong thepreparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage AT nieguanghua thepreparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage AT dengqiang thepreparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage AT tandongdong preparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage AT nieguanghua preparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage AT dengqiang preparationofmagnesiumferroussulfatefrompreoxidizedacidminedrainage |