Treatment and recovery of iron from acid mine drainage: a pilot-scale study

Hu, Xin; Yang, Hong; Tan, Ke-Yan; Hou, Shifeng; Cai, Jing-Yi; Yuan, Xin; Lan, Qiuping; Cao, Jianhua; Shen, Yan

doi:10.1016/j.jece.2021.106974

Cited by 15 publications

(5 citation statements)

References 26 publications

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“…The final removal rate of iron by NaOH was higher than 99.99%. According to Hu et al, at 20 °C, the pH range of Fe 3+ from the beginning to complete precipitation is 1.9-3.2 and the pH range of Fe 2+ precipitation is 7.9-9.0 [38]. Therefore, it can be inferred that both Fe(Ⅲ) and Fe(Ⅱ) existed in the AMD.…”

Section: Performances Of Naoh and Shell Powder During The Acid Mine D...mentioning

confidence: 97%

Alkaline Chemical Neutralization to Treat Acid Mine Drainage with High Concentrations of Iron and Manganese

Zhao,

Zhang,

2024

Water

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Due to its high acidity and toxic metal content, acid mine drainage (AMD) needs to be properly treated before being discharged into the environment. This study took the AMD collected from one specific mine in China as a sample and investigated the treatment methodology for AMD. The water quality of the AMD was measured, and the sample was treated with caustic soda (NaOH) and shell powder (one kind of conventional neutralizer, mainly composed of CaCO3) by the neutralization method. The results show that the AMD has a relatively low pH (2.16) and contains high concentrations of Fe (77.54 g/L), Mn (621.29 mg/L), Cu (6.54 mg/L), Ca (12.39 mg/L), and Mg (55.04 mg/L). NaOH was an effective neutralizer to treat the AMD and performed much better than shell powder. Various metals were precipitated, in the order of Fe(III), Cu, Fe(II), Mn, Ca, and Mg. The metal removal mechanisms included precipitation, adsorption, and co-precipitation. The optimal reaction conditions were the reaction duration was selected as 5 min and the mass ratio of NaOH to AMD was 0.16:1 (w:v). By this stage, the pH rapidly increased from 2.16 to 8.53 during AMD-NaOH interactions and various metals were efficiently removed (from 86.71% to 99.99%) by NaOH. The residual mass concentrations of Fe, Mn, Cu, Ca, and Mg after the treatment were 1.52, 1.77, 0.10, 1.65, and 2.17 mg/L, respectively. These data revealed that NaOH was a good treatment regent for this kind of AMD, based on the discharge criteria of China (GB28661 2012). Also, the shell powder was a helpful neutralizer for pH adjustment and copper removal. This neutralization method has the advantages of convenient operation, high speed, good effect, simple equipment, and low infrastructure cost. In addition, the resulting neutralized residue is a valuable and high-quality raw material, which can be used in metal smelting and separation.

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Section: Performances Of Naoh and Shell Powder During The Acid Mine D...mentioning

confidence: 97%

Alkaline Chemical Neutralization to Treat Acid Mine Drainage with High Concentrations of Iron and Manganese

Zhao,

Zhang,

2024

Water

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“…The scarcity of pilot-scale data impedes the accurate assessment of these technologies' efficiency, reliability, and scalability in real-world mining operations. Thus, further pilot-scale investigations are necessary to validate the viability and effectiveness of these treatments before their full-scale implementation in the mining industry [223][224][225][226][227][228][229]. Additionally, it is noteworthy to mention that several articles have examined the comprehensive cost of water treatment and put forth solutions that involve the implementation of integration strategies [230].…”

Section: Examples Of Mining Wastewater Treatment Processesmentioning

confidence: 99%

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

Hamraoui,

Bergani,

Ettoumi

et al. 2024

Minerals

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The mining industry is confronted with substantial challenges in achieving environmental sustainability, particularly regarding water usage, waste management, and dam safety. The increasing global demand for minerals has led to increased mining activities, resulting in significant environmental consequences. By 2025, an estimated 19 billion tons of solid tailings are projected to accumulate worldwide, exacerbating concerns over their management. Tailings storage facilities represent the largest water sinks within mining operations. The mismanagement of water content in tailings can compromise their stability, leading to potential dam failures and environmental catastrophes. In response to these pressing challenges, the mining industry is increasingly turning to innovative solutions such as tailings dewatering and water reuse/recycling strategies to promote sustainable development. This review paper aims to (I) redefine the role of mine tailings and explore their physical, chemical, and mineralogical characteristics; (II) discuss environmental concerns associated with conventional disposal methods; (III) explore recent advancements in dewatering techniques, assessing their potential for water recovery, technical and economic constraints, and sustainability considerations; (IV) and present challenges encountered in water treatment and recycling within the mining industry, highlighting areas for future research and potential obstacles in maximizing the value of mine tailings while minimizing their environmental impact.

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“…AMD is one toxic wastewater due to its low pH and high content of various heavy metal ions (Ighalo et al, 2022) . Treatment of AMD mainly focuses on increasing the pH and reducing the concentration of dissolved metal ions (Hu et al, 2022) . Most AMD treatments involved neutralization and precipitation processes (de Moraes and Ladeira, 2021) .…”

Section: Resource Recovery Opportunities From Amdmentioning

confidence: 99%

“…Fifty to 100% recovery efficiency can be obtained for various metals (Kumar and Pakshirajan, 2021;Menzel et al, 2021). Several technologies involved in recovering metals from AMD mainly focused on selective precipitation by adjusting the wastewater pH (Hu et al, 2022;de Moraes and Ladeira, 2021). Besides the selective precipitation by adjusting pH, sulfide and phosphate precipitation were also mentioned to recover the soluble metals in AMD (Hermassi et al, 2022;Menzel et al, 2021).…”

Section: Membrane Distillation Ironmentioning

confidence: 99%

“…While for the disadvantage, AMD treatment is very costly for active techniques and requires an extended period for passive techniques, respectively (Kefeni et al, 2017) . Although the treatment has high efficiency in the active technique, it generates a by-product in the form of sludge concentrated in heavy metals (Hu et al, 2022) . Therefore, it is necessary to carry out other treatments on the by-products.…”

Section: Introductionmentioning

confidence: 99%

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Emerging Strategies for Mitigating Acid Mine Drainage Formation and Environmental Impacts: A Comprehensive Review of Recent Advances

Wibowo,

Imron,

Kurniawan

et al. 2023

Sci. Technol. Indones

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Acid mine drainage (AMD) is a significant threat to the environment due to its high acidity and metal ion content. To effectively eliminate pollutants from AMD, various approaches are necessary. This review aims to provide a comprehensive understanding of recent advances in AMD mitigation. While treatment technologies have developed to eliminate AMD, they often produce sludge as a by-product and require expensive maintenance. As a cost-effective alternative, the recovery of AMD resources can reduce toxicity and promote reuse of heavy metals and rare earth elements. This review also analyzes the challenges and prospects of AMD mitigation implementation, including current mitigation conditions and knowledge gaps. Researchers can benefit from this review by gaining insight into research progress in this area, identifying strengths and weaknesses of current AMD mitigation applications, and exploring future research directions.

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Treatment and recovery of iron from acid mine drainage: a pilot-scale study

Cited by 15 publications

References 26 publications

Alkaline Chemical Neutralization to Treat Acid Mine Drainage with High Concentrations of Iron and Manganese

Alkaline Chemical Neutralization to Treat Acid Mine Drainage with High Concentrations of Iron and Manganese

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

Emerging Strategies for Mitigating Acid Mine Drainage Formation and Environmental Impacts: A Comprehensive Review of Recent Advances

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