Copper Bioleaching in China: Review and Prospect

Yin, Shenghua; Wang, Leiming; Kabwe, Eugie; Chen, Xun; Yan, Rongfu; An, Kai Xi; Zhang, Lei; Wu, Aixiang

doi:10.3390/min8020032

Cited by 82 publications

(24 citation statements)

References 232 publications

(231 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5a). When microorganisms colonized on the mineral surface, chalcopyrite was dissolved through a direct mechanism, as shown in eqn (1), which was in line with increasing trend of pH during the initial bioleaching process (Fig. 2c).…”

Section: Mechanism Of Different Exogenous Consortia On Chalcopyrite Bsupporting

confidence: 67%

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

et al. 2018

View full text Add to dashboard Cite

show abstract

Section: Mechanism Of Different Exogenous Consortia On Chalcopyrite Bsupporting

confidence: 67%

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

et al. 2018

View full text Add to dashboard Cite

show abstract

“…These concentrations are sometimes detected in surface water, sediments, and surface soils around unexploited deposits [7,8]. Moreover, mining activities can trigger the leaching of large quantities of HMs into the environment [9], particularly during opencast mining and smelting activities as they exert substantial environmental impact on soils and water streams [10]. The European industrial sector reported that mining and metal processing industries contribute to 48% of the total release of HMs contaminants [11].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metals and As in Ground Water, Surface Water, and Sediments of Dexing Giant Cu-Polymetallic Ore Cluster, East China

Pan

Zhou

Yang

et al. 2022

Water

View full text Add to dashboard Cite

Heavy metals and As (HMs) pollution in mining areas are a widespread environmental concern. In this study, ground water, surface water, and sediment samples around the Dexing area, one of the largest Cu-polymetallic ore clusters in China, were collected to examine the concentrations and distributions of As, Cd, Cr, Cu, Hg, Pb, and Zn. Pollution indices, geo-accumulation index, and potential ecological risk index were used to estimate the pollution characteristics and ecological risk of HMs. The results show that the major pollutants in the surface water were Cd, Cu, Zn, and Pb, while the dominant ecological risk of HMs in the sediments originated from Cu, As, Hg, and Cd. Moreover, HMs in the surface water and sediments exhibited substantial spatial heterogeneity in the study area, indicating a severely disturbed environment due to mining activities. The proportions of HM pollutions were higher in the Dexing River and its tributaries than in the Le’an River and its tributaries. The surface water pollution was predominant at the tributaries closest to the mine area, while the sediment contamination has been expanded several kilometers downstream of the major rivers. Overall, the ecological risk of HMs was higher in the sediments than in the surface water.

show abstract

“…As an environmentally friendly, lower cost, and efficient recycling method of valuable metal resources, the solution mining method has been widely utilized in the recycling of lower grade minerals, mine tailings, and wastes [1][2][3]. It is commonly recognized that valuable metal ions continuously transfer between the reaction interface and the leaching solution, eventually obtaining pregnant leaching solution (PLS) and metal products [4].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Effect of Stepwise Irrigation on Liquid Holdup and Hysteresis Behavior of Unsaturated Ore Heap

2021

Self Cite

View full text Add to dashboard Cite

Liquid is a crucial medium to contain soluble oxygen, valuable metal ions, and bacteria in unsaturated heap leaching. Liquid retention behavior is the first critical issue to be considered to efficiently extract low-grade minerals or wastes. In this study, the residual liquid holdup of an unsaturated packed bed was quantitatively discussed by liquid holdup (θ), residual liquid holdup (θresidual), relative liquid holdup (θ’), and relative porosity (n*) using the designed measuring device. The detailed liquid holdup and the hysteresis behavior under stepwise irrigation are indicated and discussed herein. The results show that relative porosity of the packed bed was negatively related to particle size, and intra-particle porosity was more developed in the −4.0 + 2.0 mm packed bed. The higher liquid retention of the unsaturated packed bed could be obtained by using stepwise irrigation (incrementally improved from 0.001 to 0.1 mm/s) instead of uniform irrigation (0.1 mm/s). It could be explained in that some of the immobile liquid could not flow out of the unsaturated packed bed, and this historical irrigation could have accelerated formation of flow paths. The θ was sensitive to superficial flow rate (or irrigation rate) in that it obviously increased if a higher superficial flow rate (u) was introduced, however, the θresidual was commonly affected by n* and θ’. Moreover, the liquid hysteresis easily performed under stepwise irrigation condition, where θ and θresidual were larger at u of the decreasing flow rate stage (DFRS) instead of u of the increasing flow rate stage (IFRS). These findings effectively quantify the liquid retention and the hysteresis behavior of ore heap, and the stepwise irrigation provides potential possibility to adjust liquid retention conditions.

show abstract

Copper Bioleaching in China: Review and Prospect

Cited by 82 publications

References 232 publications

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

Chalcopyrite bioleaching of an in situ leaching system by introducing different functional oxidizers

Heavy Metals and As in Ground Water, Surface Water, and Sediments of Dexing Giant Cu-Polymetallic Ore Cluster, East China

Understanding the Effect of Stepwise Irrigation on Liquid Holdup and Hysteresis Behavior of Unsaturated Ore Heap

Contact Info

Product

Resources

About