Residual xanthates in mineral processing wastewater cause severe water pollution and potential air pollution in mining areas. In this work, the subsequent degradation behavior of xanthate after adsorption on pyrite surface was investigated and confirmed for the first-time using potassium ethyl xanthate (PEX) as a model xanthate collector.
The results obtained give some insight into the environmental fate of ethyl xanthate in tailings streams, and a basis on which to consider the environmental importance of such species in tailings dams. Strategies for the destruction of residual xanthate levels in waste water streams are discussed in terms of the likely reaction products.
The thermodynamics studies indicated that the adsorption was spontaneous, exothermic with the reducing entropy. The adsorption tests on the real samples taken from the tailing stream of a copper flotation plant (Qaleh-Zari in Iran) proved that both adsorbents are capable of removing more than 90% of the residual xanthate.
In Section 3.1, we explore the mechanism behind residual connections. The distribution change is caused by a direct sum on two vectors' bs-values (see Eq.11-16). And all the distribution change in transformers are based on residual connections in layer-level residual stream (see Eq.1-4) and subvalue-level residual stream (see Eq.5-6).
The results obtained give some insight into the environmental fate of ethyl xanthate in tailings streams, and a basis on which to consider the environmental importance of …
This study objective is to degrade xanthate from flotation tailings wastewater by using a coagulation-flocculation co-Fenton oxidation process in an acid mine drainage (AMD)-H2O2 system. More than 98% sodium butyl xanthate (SBX) removal rate was achieved by the method under opt …
Semantic Scholar extracted view of "Investigation of the interaction between xanthate and kaolinite based on experiments, molecular dynamics simulation, and density functional theory" by Xiaolong Zhang et al. ... the residual xanthate in flotation wastewater may cause serious environmental pollution and … Expand. 18. PDF. ... Removal of the ...
Specifically, inorganic substances and residual reagents are at their lowest in the spring and summer months because of dilution and decomposition, especially for xanthate collectors (Muzinda and ...
method of managing xanthate containing water streams. Same methods of xanthate management and residual xanthate removal may be applied to wet and dry tailings deposition. In all cases, the precise execution of xanthate management needs to be planned site-specifically considering the individual characteristics of each mine, the …
A variety of methods for tailings management can be used to prevent the oxidation of sulphides; these are based on the exclusion of one or more of the reactive components such as oxygen [1][2][3 ...
The current study investigated the effects of thiol collectors on the flotation of base metals (BMs) and platinum group metals (PGMs) ores. The properties of a single-mineral flotation test were conducted using sodium isobutyl xanthate (SIBX), sodium ethyl xanthate (), potassium ethyl xanthate (PEX), and sodium isopropyl xanthate …
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Although most of xanthate is found to be consumed during flotation, there are still residual xanthate molecules in the flotation tailings . The amount of residual …
This study objective is to degrade xanthate from flotation tailings wastewater by using a coagulation-flocculation co-Fenton oxidation process in an acid mine drainage (AMD)-H 2 O 2 system. More than 98% sodium butyl xanthate (SBX) removal rate was achieved by the method under optimal conditions.
The residual organic reagents (including xanthates) in the flotation tailings can cause environmental issues during their disposal, besides their deleterious influence on …
Xanthate is found in residual concentrations in tailings dams [23,12]. The molecule is bioaccumulative, and this effect is potentialized when the xanthate is bound with a metal ( [49, 60]). ...
The residual xanthate in the flotation tailing can cause environmental issues through contaminating of the nearby water resources as a result of poor design of the tailings dams.
Measurements of the xanthate concentrations in the process water recycled from the tailings pond and two plant slurry tailings samples was initiated in March 2017 for the purposes of monitoring and control. Fig. 9 shows the residual xanthate measurements from March to date. It can be seen that owing to summer conditions, dilution from water ...
measurement of residual xanthate concentration directly from flotation concentrate cells. Xanthate is a commonly used collector in flotation processes where its residual concentration has an impact on the recovery of metal sulphides. Xanthoprobe has been installed at the Eland Platinum PGM concentrator since March 2010 to establish the long-
Removal of the residual xanthate from flotation plant tailings using modified bentonite •The residual xanthate in the flotation tailings can cause environmental issues.•H-Be and Al-Be were synthesized and used for removal of the residual xanthate.•At optimum conditions more than 99% of the residual xanthate was removed.•The kinetics, …
The residual organic reagents (including xanthates) in the flotation tailings can cause environmental issues during their disposal, besides their deleterious influence on the flotation performance during recycling. In this study, the adsorption characteristics of bentonite modified with copper and manganese ferrite nanoparticles (Besbnd …
DOI: 10.1016/j.cej.2021.134104 Corpus ID: 245172470; Photocatalytic degradation of xanthate in flotation plant tailings by TiO2/graphene nanocomposites @article{Jiang2021PhotocatalyticDO, title={Photocatalytic degradation of xanthate in flotation plant tailings by TiO2/graphene nanocomposites}, author={Man Jiang and …
Efficient treatment of residual xanthate from tailing wastewater has attracted soaring interesting recently. Herein, effect of activated H 2 O 2 by natural ilmenite (FeTiO 3) as a catalyst on sodium butyl xanthate (SBX) degradation was systematically investigated.More than 98 % SBX degradation efficiency was achieved by the method …
Also, the combination of residual xanthate molecules and heavy metals will change the solution chemistry properties of slurry systems when the flotation tailings wastewater is recycled as return water, and thus deteriorate the flotation selectivity of minerals (Wang et al., 2022). Hence, it is crucial to efficiently treat residual xanthate in ...
However, the residual xanthate in flotation wastewater may cause serious environmental pollution and even human health hazards. At present, a variety of treatment technologies have been developed
The pyrite bloc crystals were crushed and milled in a steel laboratory mortar to the same particle size and distri- M. Kongolo et al. / Minerals Engineering 17 (2004) 505–515 Table 1 Particle size features of the pyrite studied compared to typical mine tailings Particle size characteristics Canadian type tailings (lm) Reconstituted pyrite D ...
The results obtained give some insight into the environmental fate of ethyl xanthate in tailings streams, and a basis on which to consider the environmental importance of such species in tailings ...
The adsorption capacity of BeeCuFe2O4 was found to be higher than BeeMnFe2O4 and at optimum conditions (adsorbent dosage: 4 mg/mL; xanthate concentration: 1000 mg/L; pH=9.2; time=40 min) more than 94% of the residual xanthate was …
Key takeaway: 'Modified bentonite adsorbents, particularly Al-Be, effectively remove over 99% of residual xanthate from flotation plant tailings, reducing environmental issues and promoting reuse of sulfide minerals.'
Strategies for the destruction of residual xanthate levels in waste water streams are discussed in terms of the likely reaction products.
Although most of the xanthates added to the flotation circuits are adsorbed by target minerals, about 50 % of the xanthates remain in the discharged tailings pulp, with concentrations ranging from 5.0 to 40.0 mg/L (Rezaei et al., 2018, Tan et al., 2021, Zhou et al., 2021b).Xanthates can escape into the environment from mineral processing, for …
Degradation of residual xanthate in flotation tailing wastewater by activated H2O2 with natural ilmenite: A heterogeneous fenton-like reaction catalyzed at natural pH ... An innovative method to degrade xanthate from flotation tailings wastewater in acid mine drainage (AMD) system: Performance, degradation mechanism and pathways. ...
Efficient treatment of residual xanthate from tailing wastewater has attracted soaring interesting recently. Herein, effect of activated H 2 O 2 by natural …
The growing application of flotation reagents (e.g., xanthate collectors) exacerbates water pollution in mined sites. Semiconductor-based photocatalysis is widely recognized as an efficient and green technology for treating mineral processing wastewater. However, the on-site practical application of powdery photocatalysts is still …
There is residual xanthates in the Ni tails and Final Tails samples and very little in Process water sample. • The higher the xanthate concentration, the higher the …
Degradation of ethyl xanthate in flotation residues by hydrogen peroxide. Abstract: The degradation behavior of ethyl xanthate (EX) salt was the most widely used collector in …
removal of residual xanthate from flotation wastewater are emphasized. A review such as this will help researchers understand the progress in research, identify the strengths and
UV/VIS Spectrophotometry was employed to measure residual xanthates in key process streams and process return water from the Tailings Storage Facility. This allowed the …
The residual xanthates and their degradation products in the plant tailings may cause serious adverse health and environmental effects to humans, animals and natural ecosystems resulting from inappropriate design of the tailings disposal system (Li, 1990, Lam, 1999, Zhao et al., 2006).
The beneficiation wastewater could leak out. When it contains residual xanthate, it can cause odour nuisances and toxicity to the biota [3], resulting in the deterioration of the surrounding water quality [4], [5]. The efficient treatment of this kind of wastewater is crucial when the aim is to efficiently recycle mine wastewater and promote ...