The behavior of heavy metal release from sulfide waste rock under microbial action and different environmental factors

Dong, Yingbo; Chen, Danni; Lin, Hai

doi:10.1007/s11356-022-20555-w

Cited by 4 publications

(4 citation statements)

References 46 publications

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“…Sources of HMs can be natural such as landslides, weathering, and volcanic eruptions, but they mainly originate from anthropogenic processes such as mining, agriculture, electroplating fossil fuel combustion, and waste disposal. For instance, agricultural use of HMs in the form of pesticides and fertilizer as well as corrosion and industrialization releases HMs into the environment [7,8]. Untreated wastewater containing heavy metals discharged into the natural environment can pollute water bodies and soil, endangering food safety and human health through the food chain [8].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, agricultural use of HMs in the form of pesticides and fertilizer as well as corrosion and industrialization releases HMs into the environment [7,8]. Untreated wastewater containing heavy metals discharged into the natural environment can pollute water bodies and soil, endangering food safety and human health through the food chain [8]. An increase in concern for public health has led to the enaction of varied legislation to control the emission of HMs [9].…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 2023, 13, x FOR PEER REVIEW 2 of 20 containing heavy metals discharged into the natural environment can pollute water bodies and soil, endangering food safety and human health through the food chain [8].…”

Section: Introductionmentioning

confidence: 99%

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Novel Materials for Heavy Metal Removal in Capacitive Deionization

Zhong

Zeng

et al. 2023

Applied Sciences

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Heavy metals are considered a class of contaminant that can accumulate in the food chain and thus must be removed from contaminated media. Heavy metals can be removed by electrocoagulation, electroflotation, electrodialysis, capacitive deionization, and so on. Among the methods to remove heavy metals, capacitive deionization is one of the most attractive methods that can remove heavy metal ions without using a large volume of chemicals and producing a high number of heavy metals containing solid wastes. In this study, after a brief introduction to the mechanism of capacitive deionization, we focus on materials that have been developed as electrodes for heavy metal removal in capacitive deionization and summarize the latest advancements. Finally, with particular emphasis on material design, we provide some further insights in this area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Materials for Heavy Metal Removal in Capacitive Deionization

Zhong

Zeng

et al. 2023

Applied Sciences

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“…The leaching behaviors of toxic metal(loid)s in different kinds of mining wastes are different due to the differences in the processing process [17]. For example, finer tailings have a larger contact area than the coarser characteristics of waste rocks, which makes it easier for them to oxidize and release toxic metal(loid)s [18,19]. Due to the tailings having a greater tendency to release toxic metal(loid)s than waste rocks, many studies have investigated their environmental risk, mobility, and safe disposal at present [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Leaching Behavior of As and Pb in Lead–Zinc Mining Waste Rock under Mine Drainage and Rainwater

Guo,

Yang,

et al. 2023

Toxics

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At present, the pollution of arsenic (As) and lead (Pb) is becoming increasingly serious. The pollution caused by the release of As and Pb from lead–zinc mines has seriously affected the water and soil environment and threatened human health. It is necessary to reveal the release characteristics of As and Pb. The actual scene of mine drainage (MD) and rainwater (RW) leaching waste rocks is the one of the main reasons for the release of As and Pb. However, the leaching behavior of As and Pb in these waste rocks under MD and RW suffered from a lack of in-depth research. In this study, we investigated the occurrence of As and Pb in waste rocks (S1–S6) by using X-ray diffraction (XRD) and time-of-flight secondary ion mass spectrometry (TOF-SIMS), and then, the changes in As and Pb concentration and the hydrochemical parameter in leaching solution were systematically studied. Furthermore, the correlation between the release of As and Pb and mineral composition was also evaluated. Results showed that these waste rocks were mainly composed of carbonate and sulfide minerals. As and Pb were mainly bounded or associated with sulfide minerals such as arsenopyrite, pyrite, chalcopyrite, and galena in these waste rocks, and small parts of As and Pb were absorbed or encased by clay minerals such as kaolinite and chlorite. Under MD and RW leaching, the pH, redox potential (Eh), and electric conductivity (EC) of each waste rock tended to be consistent due to their buffering ability; the leachate pH of waste rocks with more carbonate minerals was higher than that of sulfide minerals. Both As and Pb were released most under MD leaching in comparison to RW, reaching 6.57 and 60.32 mg/kg, respectively, due to MD’s low pH and high Eh value. However, As in waste rock released more under alkaline conditions because part of the arsenic was in the form of arsenate. As and Pb release were mainly positively correlated with the proportions of sulfide minerals in these waste rocks. MD leaching significantly promoted the release of As and Pb from waste rocks, which would cause a great threat to the surrounding environment, and control measures were imperative. This paper not only reveals the As and Pb pollution mechanism around the lead–zinc mining area but also provides a theoretical basis for the prevention and control of As and Pb pollution in the future.

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