Effect of selected parameters on stibnite concentrates leaching by ozone

Tian, Qinghua; Wang, Hengli; Xin, Yuntao; Yang, Ying; Liu, Dong; Guo, Xueyi

doi:10.1016/j.hydromet.2016.01.020

Cited by 15 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, many researchers have studied the utility of ozone in hydrometallurgy and the treatment of mine wastewater. These include gold ore [ 15 , 16 ], silver-bearing pyrite [ 17 ], pyrite [ 13 ], stibnite [ 18 ], sphalerite [ 19 ], wastewater containing cyanide [ 20 ], and thiosalts [ 21 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Dissolution Process of Sphalerite in Fe2(SO4)3-O3 System: Implications for Heavy Metals Removal and Recovery

Zhang,

Zhao,

Zhang

et al. 2024

Toxics

View full text Add to dashboard Cite

Metal sulfides in waste rocks and tailings are susceptible to serious soil and water contamination due to the generation of acid mine drainage (AMD) during stockpiling. The hydrometallurgical process is one of the most essential heavy metal remediation technologies through harmless disposal and resource utilization of the waste sulfides. However, atmospheric hydrometallurgy of sulfides still faces great challenges due to low leaching efficiency and high cost. In this work, we proposed a cooperative leaching system (Fe2(SO4)3-O3) and investigated the oxidative dissolution process of sphalerite (ZnS). Under the optimal conditions, the extracted zinc reached 97.8%. Reactive oxygen species (ROS) (·OH, 1O2 and ·O2−) were identified in the radical quenching experiments. The dissolution of sphalerite did not show passivation due to the ozone’s capability to oxidize the sulfur in sphalerite to sulfate. In addition, stirring rate, O3 inlet concentration, and Fe2(SO4)3 concentration had a significant effect on the dissolution of sphalerite. Meanwhile, the apparent activation energy was 24.11 kJ/mol based on kinetic fitting, which indicated that the controlling step of the reaction was mainly a diffusion process. This work demonstrated the cooperative effect of sphalerite leaching in the O3-Fe2(SO4)3 system and provided a theoretical reference for efficient and atmospheric dissolution of sphalerite.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxidative Dissolution Process of Sphalerite in Fe2(SO4)3-O3 System: Implications for Heavy Metals Removal and Recovery

Zhang,

Zhao,

Zhang

et al. 2024

Toxics

View full text Add to dashboard Cite

show abstract

“…For leaching this waste, H 2 SO 4 , HNO 3 , HCl, and aqua regia (3HNO 3 :1HCl) were used, along with oxidants, which are O 2 , Cl 2 , H 2 O 2 , etc. [27]. Ozone, next to the oxidants, is a popular leaching agent that has the ability to react with metals, used among others to recover metals from ores.…”

Section: Introductionmentioning

confidence: 99%

“…Ozone with a standard redox potential of 2.07 V is known as one of the strongest oxidants in acidic solutions [27]. According to the literature, ozone is a stronger oxidant than oxygen.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrometallurgical Recycling Process for Mobile Phone Printed Circuit Boards Using Ozone

Brožová

Lisińska

Saternus

et al. 2021

Metals

View full text Add to dashboard Cite

Printed circuit boards (PCBs) can be an important source of non-ferrous metals (Al, Sn, Zn, and Ni) and precious metals (Au, Ag, Cu, and Pd). With the continuous increase in demand for metals due to the depletion of ores, recycling of this waste is becoming an attractive alternative. The printed circuits also contain hazardous metals, such as Pb, Hg, As, and Cd. Due to the huge increase in the amount of e-waste, the processing of printed circuit boards for metal recovery and proper handling of hazardous substances has a positive effect on the environment. Pyrometallurgical and hydrometallurgical methods are used for the treatment of this waste. Various oxidizing agents are used in the hydrometallurgical processes, including ozone. PCBs from mobile phones were assessed for the recovery of Cu, Sn, and precious metals. The ground and sieved materials were leached in nitric acid, hydrochloric acid, and sulfuric acid at various process parameters, such as leaching time, leaching agent, and temperature. It was found that the best result was obtained using hydrochloric acid with the addition of ozone at 353 K for a period of 4 h to obtain 68.45 g/dm3 of copper. Preliminary results of electrolysis and cementation are also presented.

show abstract

“…Ozone is used in hydrometallurgical processes by many researchers. Ozone with a standard redox potential of 2.07 V is known as one of the strongest oxidizing agent [17]. The oxidationprecipitation of cobalt (II) in a solution of cobalt chloride by ozone has been described in [18].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Lisińska

Saternus

Willner

et al. 2018

View full text Add to dashboard Cite

New technologies and the globalization of the electrical and electronic equipment market cause a continuous increase in the amount of electrical and electronic waste. They constitute one of the waste groups that grows the fastest in quantity. The development of the new generation of electrical and electronic devices is much faster than before. Recently attention has been concentrated on hydrometallurgical methods for the recovery of metals from electronic waste. In this article the role of an oxidizing agent, mainly ozone and hydrogen peroxide was presented in hydrometallurgical processes. Leaching process of printed circuits boards (PCBs) from used cell phones was conducted. The experiments were carried out in the presence of sulfuric acid and ozone as an oxidizing agent for various temperatures, acid concentration, ozone concentration. As a result, the concentrations of copper, zinc, iron and aluminum in the obtained solution were measured. The obtained results were compared to results obtained earlier in the presence of hydrogen peroxide as an oxidizing agent and discussed.

show abstract

Effect of selected parameters on stibnite concentrates leaching by ozone

Cited by 15 publications

References 16 publications

Oxidative Dissolution Process of Sphalerite in Fe2(SO4)3-O3 System: Implications for Heavy Metals Removal and Recovery

Oxidative Dissolution Process of Sphalerite in Fe2(SO4)3-O3 System: Implications for Heavy Metals Removal and Recovery

Hydrometallurgical Recycling Process for Mobile Phone Printed Circuit Boards Using Ozone

Archives of Metallurgy and Materials

Contact Info

Product

Resources

About