Process effluents and mine tailings: sources, effects and management and role of nanotechnology

Mohapatra, Dipti Prakash; Kirpalani, Deepak M.

doi:10.1007/s41204-016-0011-6

Cited by 55 publications

(33 citation statements)

References 89 publications

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“…They bridge the gap between organic and inorganic counterparts and also overcome the nonuniformity at the structural level [18][19][20][21]. A major breakthrough occurred when Haraguchi et al prepared the first ever nanocomposite hydrogel using free radical polymerization.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of a nanocomposite hydrogel for combined photocatalytic degradation of a mixture of malachite green and fast green dye

Sharma

ALOthman

Kumar

et al. 2017

Nanotechnol. Environ. Eng.

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In this study, starch/poly(alginic acid-cl-acrylamide)/Fe/Zn nanocomposite hydrogel (ST/PL(AA-clAAm)/Fe/Zn NCHG) was synthesized by polymerization/ co-precipitation method. This nanocomposite hydrogel was prepared with the notion to remove the mixture of organic pollutants from the water system. Mixture of malachite green and fast green dye was used to check the photocatalytic degradation ability of the prepared nanocomposite hydrogel. ST/PL(AA-cl-AAm)/Fe/Zn NCHG was characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy and Fourier transform infrared. The degradation of the two dyes followed the pseudo-first-order kinetics. The results showed that by using the prepared nanocomposite hydrogel, 91% of malachite green and 82% of fast green dye, respectively, were degraded within 5 h of their contact.

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of a nanocomposite hydrogel for combined photocatalytic degradation of a mixture of malachite green and fast green dye

Sharma

ALOthman

Kumar

et al. 2017

Nanotechnol. Environ. Eng.

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“…Low pH and OM generally favor the release of PTEs by soil, such as tailings, and eventual uptake by plants 19. Differences in the mineralogy of mined ore, extraction and natural biogeochemical processes may explain the variability of the concentrations of PTEs in tailings 20. While Cr, Cu and Zn are essential elements, Cd and Pb are non-essential 21.…”

Section: Discussionmentioning

confidence: 99%

Trace Elements in Leaf Extracts of Eucalyptus grandis Traditionally Used to Treat Common Cold and Flu

Kanda

Goronga

2019

Journal of Health and Pollution

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Background. Eucalyptus species have been used for the remediation of mine tailings dams in Zimbabwe. However, a traditional medicinal remedy (TMR) for the treatment of mild acute respiratory infections, such as common cold and flu includes the use of Eucalyptus leaves. Objectives. The aim of the present study was to determine total concentrations of selected potentially toxic trace elements (PTEs) in gold mine tailings and leaves of Eucalyptus grandis and to identify extractable fractions of PTEs in leaves via boiling for 10 minutes in water, which is the process used to create TMRs to treat common cold and flu. Methods. Mine tailings and leaves of E. grandis were randomly collected at a gold mine tailings dam between April and June 2019. They were digested for laboratory analysis using standard analytical methods. Leaves were boiled in water for 10 minutes to prepare the TMR as practiced by the local community. The concentrations of PTEs were determined spectrometrically. Significant differences between PTEs in young and mature leaves were determined by analysis of variance. Results. Mine tailings were acidic (pH 4.52±0.62) with very low content of organic matter (0.02%) and contained PTEs in increasing concentrations of cadmium (Cd) < nickel (Ni) < lead (Pb) < chromium (Cr) < copper (Cu) < zinc (Zn) (n = 27). Mature leaves of E. grandis had higher concentrations than young leaves for Cr, Pb and Zn (p <0.05) which were lower than permissible limits in medicinal plants. Overall, boiling leaves in water for 10 minutes resulted in low extraction of PTEs (< 20%). Participant Consent. Obtained Conclusions. Concentrations of PTEs in leaves and leaf extracts of E. grandis were very low. However, TMRs should not be prepared from medicinal plants growing on metalliferous environments, such as mine tailings dams, due to the presence of cumulative toxins such as Cd and Pb. Further studies are needed to investigate the effect of various boiling times and should include arsenic in the studied PTEs. Competing Interests. The authors declare no competing interests for this study.

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“…Water is also used for dust suppression, potable consumption (i.e., drinking), cooling, sealing pump glands, reagent mixing, and other miscellaneous activities. 32,33 An example of the various water uses and flow rates for a typical copper mine is presented in Table 2.…”

Section: Water Demand In the Mining Industrymentioning

confidence: 99%

National Alliance for Water Innovation (NAWI) Resource Extraction Sector Technology Roadmap 2021

Cath

Chellam

Katz

et al. 2021

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Industrial WastewaterWater from various industrial processes that can be treated for reused Municipal WastewaterWastewater treated for reuse through municipal resource recovery treatment plants utilizing advanced treatment processes or decentralized treatment systems Agricultural WastewaterWastewater from tile drainage, tailwater, and other water produced on irrigated croplands as well as wastewater generated during livestock management that can be treated for reuse or disposal to the environment Mining WastewaterWastewater from mining operations that can be reused or prepared for disposal Produced WaterWater used for or produced by oil and gas exploration activities (including fracking) that can be reused or prepared for disposal Power and Cooling WastewaterWater used for cooling or as a byproduct of treatment (e.g., flue gas desulfurization) that can be reused or prepared for disposal PowerWater used in the electricity sector, especially for thermoelectric cooling Resource ExtractionWater used to extract resources, including mining and oil and gas exploration and production IndustrialWater used in industrial and manufacturing activities not included elsewhere, including but not limited to petrochemical refining, food and beverage processing, metallurgy, and commercial and institutional building cooling MunicipalWater used by public water systems, which include entities that are both publicly and privately owned, to supply customers in their service area

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Process effluents and mine tailings: sources, effects and management and role of nanotechnology

Cited by 55 publications

References 89 publications

Fabrication and characterization of a nanocomposite hydrogel for combined photocatalytic degradation of a mixture of malachite green and fast green dye

Fabrication and characterization of a nanocomposite hydrogel for combined photocatalytic degradation of a mixture of malachite green and fast green dye

Trace Elements in Leaf Extracts of Eucalyptus grandis Traditionally Used to Treat Common Cold and Flu

National Alliance for Water Innovation (NAWI) Resource Extraction Sector Technology Roadmap 2021

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