Reductive leaching of zinc, cobalt and manganese from zinc plant residue

Fattahi, Azar; Rashchi, Fereshteh; Abkhoshk, Emad

doi:10.1016/j.hydromet.2016.02.003

Cited by 37 publications

(20 citation statements)

References 12 publications

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“…Furthermore, we found that the processing can increase the leaching rate of most elements (p < 0.05, p < 0.01) and can make it easier for the element to transfer into the water solution (Rasmussen et al, 2017). Previous studies have indicated that Co and As could be easily mobilized from the herbs to the decoctions (Fattahi, Rashchi & Abkhoshk, 2016;Obeidy et al, 2016) transferring from herbal medicines to decoctions. In terms of the TRs research on heavy metals, water extraction can significantly reduce the contents (Zhao, Wang, et al, 2016;Zhao, We, et al, 2016).…”

Section: Regularity Of the Transfer Ratiosmentioning

confidence: 81%

“…Furthermore, we found that the processing can increase the leaching rate of most elements ( p < 0.05, p < 0.01) and can make it easier for the element to transfer into the water solution (Rasmussen et al., 2017). Previous studies have indicated that Co and As could be easily mobilized from the herbs to the decoctions (Fattahi, Rashchi & Abkhoshk, 2016; Obeidy et al., 2016). In this study, we found that Co and As had the highest TRs values, thus the two elements should be closely monitored to prevent further transferring from herbal medicines to decoctions.…”

Section: Resultsmentioning

confidence: 99%

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Multielements determination and metal transfer investigation in herb medicine Bupleuri Radix by inductively coupled plasma‐mass spectrometry

Luo

Ding

et al. 2018

Food Science & Nutrition

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Bupleuri Radix is a famous traditional Chinese medicine (TCM) and an important raw material in TCM patent prescriptions. It is widely used in several countries, including China, Japan, South Korea, and America. However, the impact of heavy metal transfer rules on TCMs remains unknown. In this study, a total of 45 paired original medicines (OMs), decoction pieces (DPs), and vinegar‐processed (VPs) samples were simultaneously determined via inductively coupled plasma‐mass spectrometry after a microwave digestion. The concentrations of the elements were shown at three levels: (a) Al and Fe at the mg/g level; (b) Pb, Cu, Ba, Mn, Cr, and Ni at the mg/kg level; (c) Co, As, Cd, and Hg at μg/kg level. It is worth noting that the Cu levels were found to exceed the maximum concentration set by Chinese legislation (20.0 mg/kg). In addition, Mn, Ni, and Cu levels were higher in samples from the Gansu province than those from other provinces. The accumulation of the heavy metals decreased in the order of OMs > DPs > VPs; this was especially true for the Al and Fe levels. Furthermore, the results indicate that decocting the samples may reduce the intake of heavy metals. The element transfer ratios for decoctions were under 50% compared to herbal medicines and decreased in the order of Co > As > Mn > Hg > other metals. Our study strongly suggests that long‐term and regular monitoring for heavy metals in the plant is necessary.

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Section: Regularity Of the Transfer Ratiosmentioning

confidence: 81%

“…Furthermore, we found that the processing can increase the leaching rate of most elements ( p < 0.05, p < 0.01) and can make it easier for the element to transfer into the water solution (Rasmussen et al., 2017). Previous studies have indicated that Co and As could be easily mobilized from the herbs to the decoctions (Fattahi, Rashchi & Abkhoshk, 2016; Obeidy et al., 2016). In this study, we found that Co and As had the highest TRs values, thus the two elements should be closely monitored to prevent further transferring from herbal medicines to decoctions.…”

Section: Resultsmentioning

confidence: 99%

Multielements determination and metal transfer investigation in herb medicine Bupleuri Radix by inductively coupled plasma‐mass spectrometry

Luo

Ding

et al. 2018

Food Science & Nutrition

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“…In the experiment, the three main condition variables (factors) that affect the leaching process (amount of concentrated sulfuric acid, leaching temperature, and leaching time) were selected based on the CCD module design. The experiments were later analyzed using the response surface methodology [15,16].…”

Section: Methodsmentioning

confidence: 99%

Response Surface Methodology for Optimization of Copper Leaching from Refractory Flotation Tailings

et al. 2018

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Response surface methodology is used to optimize the leaching process for refractory flotation copper tailings. The proportion of the refractory combination oxide copper (chrysocolla) is 64.84%. At present, few studies have examined the leaching of chrysocolla. In this study, we examine the effects of several variables, including the amount of concentrated sulfuric acid, leaching temperature, and leaching time, on leaching efficiency. Using a response surface methodology, we develop a quadratic model relanbting all the above experimental variables with leaching efficiency. The resulting model is highly consistent with experimental data. According to the model, the factor with the greatest influence on leaching efficiency is the amount of concentrated sulfuric acid. According to the model, the optimal leaching conditions are 85 kg/t concentrated sulfuric acid, a leaching temperature of 68.51 • C, and a leaching time of 4.36 h. The actual measured leaching efficiency under these conditions is 85.86%, which is close to the value of 86.79% predicted by the model. We study the leaching processes using scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) surface scan analyses. Both methods allow us to explore the content of the main element and visually observe its distribution, allowing us to develop effective methods for treating low-grade oxide ores.

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“…In the recent studies, various extraction methods for recovery of valuable metals from zinc-containing residue (ZCR) was applied such as chloride leaching (Raghavan et al 1998;Langova et al 2009;Silwamba et al 2020), two-stage leaching with sulphuric acid and citric acid (Fattahi et al 2016;Sethurajan et al 2017), sulfate roasting and water leaching (Jiang et al 2017;Guo-min et al 2017), using of membrane filter press (Ru et al 2015), and converting by SO 2 (Li et al 2020). On the other hand, mechanical…”

Section: Introductionmentioning

confidence: 99%

Characterization and leaching of mechanically activated zinc residue

Turan

2021

Chem. Pap.

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Zinc extraction from zinc-containing residual (ZCR) was examined with the leach of sulfuric acid of original materials and the materials milled in two different mill systems. For this purpose, vibrating ball mill (VBM) and ring mill (RM) were used. In chemical analysis of ZCR, it was determined that it contains a significant amount of zinc, lead, iron and silver and consisted of mostly CaSO4.2H2O, PbO, SiO2, Fe2O3, ZnFe2O4, Al2FeO4 and PbSO4 mineral phases. It was determined in XRD analysis of samples milled at both mills that peak intensity dramatically decreased when compared to original sample.According to comparative characterization analyses of the milled samples, it was determined that through the increasing grinding time, the particles became agglomerated and an increase in grain size occurred. This situation was also supported by N2-BET and SEM analyses.While zinc extraction value of the sample milled for 1 min, which was obtained at 0.5 M H2SO4 at leach temperature of 25 °C, at the solid–liquid rate of 100:1 and during the leach time of 30 min, was 90% and 60% for, respectively, VBM and RM, zinc of 54% was determined to be extracted in the leach of the original sample, under the same conditions.

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Reductive leaching of zinc, cobalt and manganese from zinc plant residue

Cited by 37 publications

References 12 publications

Multielements determination and metal transfer investigation in herb medicine Bupleuri Radix by inductively coupled plasma‐mass spectrometry

Multielements determination and metal transfer investigation in herb medicine Bupleuri Radix by inductively coupled plasma‐mass spectrometry

Response Surface Methodology for Optimization of Copper Leaching from Refractory Flotation Tailings

Characterization and leaching of mechanically activated zinc residue

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