A Process for Advanced Recycling of Water Originating from Mining Operations, with Metal Recovery

Shadrunova, I. V.; Orekhova, N. N.

doi:10.1007/s10230-015-0338-4

Cited by 13 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the exception of Cr(VI), certain other heavy metal ions and small molecules may also affect the ability of recombinant strains to reduce Cr(VI) in industrial wastewater ( Wani et al, 2019 ; Tan et al, 2020 ). Cu 2+ , Mn 2+ , and Fe 2+ are frequently present with Cr(VI) in wastewater from the electroplating and mining industries, whereas SDS, as detergent and textile auxiliaries, is present with Cr(VI) in textile wastewater ( Shadrunova and Orekhova, 2015 ; Khosravi et al, 2020 ). These heavy metal ions and small molecules may impair the recombinant strain’s capacity to remove Cr(VI) in practice, thus it is critical to test the impact of Cr(VI) removal prior to application.…”

Section: Resultsmentioning

confidence: 99%

Cr(VI) Removal by Recombinant Escherichia coli Harboring the Main Functional Genes of Sporosarcina saromensis M52

Zhang

Guo

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

Hexavalent chromium [Cr(VI)], a recognized heavy metal pollutant, has attracted much attention because of its negative impact on the ecological environment and human health. A chromium-resistant strain, Sporosarcina saromensis M52, was discovered, and the functional genes orf2987, orf3015, orf0415, and orf3237 were identified in the strain by genomics. With the advancement of DNA recombination and gene-splicing technology, genetic engineering technology was used to produce recombinant strains 2987, 3015, 0415, and 3237. The study revealed Cr(VI) tolerance in the order of M52 ≈ 2987 > 3015 ≈ 0415 > 3237 and reduction abilities in the order of M52 ≈ 2987 > 3015 > 0415 ≈ 3237. SEM-EDS, XRD, FT-IR and XPS were utilized to examine the surface structure of the recombinant strains and analyze the surface components and main functional groups. A comprehensive review of the recombinant strains’ capacity to tolerate and reduce Cr(VI) revealed that orf2987 and orf0415 were the main functional genes in Sporosarcina saromensis M52, which may play a key role in removing Cr(VI) and protecting the strain, respectively. The optimum pH for recombinant strains 2987 and 0415 was 7.5–8.5, and the optimum temperature was 37°C. Cu2+ had the greatest promotional effect when Cr(VI) was removed by them, while SDS had an inhibitory effect. This research provided the foundation for further study into the mechanism of Cr(VI) reduction in Sporosarcina saromensis M52, as well as a theoretical basis for the development of effective engineered strains to repair Cr(VI) contamination.

show abstract

Section: Resultsmentioning

confidence: 99%

Cr(VI) Removal by Recombinant Escherichia coli Harboring the Main Functional Genes of Sporosarcina saromensis M52

Zhang

Guo

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…Facility and process engineering improvement (e.g., dry quenching and dry-dedusting techniques for blast furnaces and converter flue gas, comprehensive use of water, flue gas and all solid wastes, regenerative combustion technology, gas recycling technology, blast furnace top gas recoveryunit technology, sintering desulfurization, use of retorts, etc.) Red, Rec, O, L [29,35] Mine water recycling Rec, L [54,55] Mine water management Red, O [56,57] Bioremediation Red, E [58][59][60][61] Mine rehabilitation (e.g., progressive type) Red, R [55,62] Shift to renewable energy and decarbonization Red, R [63,64] Inter-enterprise (meso)…”

Section: Ce Layers Some Examples Of Technologies and Approaches Sourcesmentioning

confidence: 99%

Charting Policy Directions for Mining’s Sustainability with Circular Economy

Balanay

Halog

2016

Recycling

View full text Add to dashboard Cite

This paper discusses circular economy (CE) as an option to mitigate the environmental impacts of mining operations, and a framework based on the three dimensions of sustainability, the possible uses of mining wastes, the life cycle, and the systems approaches to determine the policies that will induce initiatives towards designing out wastes for a mining-based circular economy. Previous research has been reviewed to determine CE configuration and the basis for the framework to guide in the development of CE-related mining policies. The Chinese model of circular economy, noted for the introduction of industrial symbiosis through eco-industrial parks at the meso level, and public participation at the macro level, forms the basic structure of the framework aimed at curbing mining waste, and closing the loop in mining. Holistic research is important in taking proactive CE technology actions, strategic measures, and policies, which can use life cycle assessment (LCA) methods (environmental and social LCA and life cycle costing) and systems dynamic modeling. With systems dynamic modeling, the framework introduced in this work can be expanded to cover as many important aspects as possible, and can check for areas of policy resistance that have been the reason for most policy failures.

show abstract

“…Even with the same source, water quality varies greatly. Water quality parameters such as the surge volume, solid content and particle size fluctuate widely [28,29]. Traditional coal mine water treatment using conventional coagulation-flocculation and sedimentation processes has the disadvantage of a large footprint, long hydraulic residence time and high operating costs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

Liu¹,

Xiao²,

Chang³

et al. 2021

Separations

View full text Add to dashboard Cite

In this study, a coal mine water flocculation system was established. A series of flocculation tests were carried out at different structural parameters (cylinder height, cone-plate insertion depth and cone-plate spacing) to better investigate the effect of the cone-plate clarifier on coal mine water treatment performance. Sixteen sampling points were set up in the system for data monitoring to generate the required data. The cone-plate clarifier was divided into five zones for flocculation analysis. The increased cylinder height facilitated the flocculation of particles in the micro flocculation zone and the settling of particles in the settlement zone. The chemicals used are polyaluminum chloride (PACl), Fe3O4 and polyacrylamide (PAM), corresponding to doses of 60 mg/L, 40 mg/L and 6 mg/L, respectively. Insufficient insertion depth of the cone-plate will cause the small flocs that have not been fully flocculated to enter the exit pipe zone directly through the cone-plate, while too much insertion depth will cause the large floc in the settlement zone to re-enter the exit pipe zone. The flocculation effect of small flocs increased as the cone-plate spacing decreased, which is consistent with the shallow pool theory. When the cone plate spacing was too narrow, the amount of fluid was reduced and the increase in fluid velocity reduced the flocculation effect. Curve fitting was conducted for Suspended solids(SS) and turbidity removal efficiency under each structural parameter to derive the variation of SS and turbidity removal efficiency under different structural parameters. The regression models of SS and turbidity removal efficiency on the cylinder height, cone-plate insertion depth and cone-plate spacing were established based on the curve fitting results, and the regression models were verified to be well fitted based on the comparison of experimental results. Finally, the optimal values of SS and turbidity removal efficiency were found based on the regression model. The flow rate of the cone-plate clarifier is 0.6 m3/h. The SS removal efficiency reached 96.82% when the cylinder height was 708 mm, the cone-plate insertion depth was 367 mm and the cone-plate spacing was 26 mm. The turbidity removal efficiency reached 86.75% when the cylinder height was 709 mm, the cone-plate insertion depth was 369 mm and the cone-plate spacing was 26 mm.

show abstract

A Process for Advanced Recycling of Water Originating from Mining Operations, with Metal Recovery

Cited by 13 publications

References 1 publication

Cr(VI) Removal by Recombinant Escherichia coli Harboring the Main Functional Genes of Sporosarcina saromensis M52

Cr(VI) Removal by Recombinant Escherichia coli Harboring the Main Functional Genes of Sporosarcina saromensis M52

Charting Policy Directions for Mining’s Sustainability with Circular Economy

Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

Contact Info

Product

Resources

About