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Use of humic substances in froth flotation processes

dc.contributor.authorReyes-Bozo L.
dc.contributor.authorVyhmeister E.
dc.contributor.authorGodoy-Faúndez A.
dc.contributor.authorHigueras P.
dc.contributor.authorFúnez-Guerra C.
dc.contributor.authorValdés-González H.
dc.contributor.authorSalazar J.L.
dc.contributor.authorHerrera-Urbina R.
dc.date.accessioned2020-09-02T22:26:59Z
dc.date.available2020-09-02T22:26:59Z
dc.date.issued2019
dc.identifier10.1016/j.jenvman.2019.109699
dc.identifier.citation252, , -
dc.identifier.issn03014797
dc.identifier.urihttps://hdl.handle.net/20.500.12728/6009
dc.descriptionContinual growing demand for metals in regular and emerging markets has led to an increasing use of chemicals and reagents in ore processing. This trend force to incur in an increasing use of commodities which inevitable leads to higher operational costs and environmental concern. The chemicals and reagents used in flotation processes especially invoke high costs of handling and disposal due to their hazardous nature, but until now, few studies have been carried out to seek possible alternatives. In order to develop a cheaper and greener processes, these hazardous materials should be replaced by more sustainable products, by-products, or wastes generated by other industries. Biosolids, cheaper and greener than chemical frothers and collectors, have been tested successfully in flotation processes. Studies of removal rates and froth flotation kinetics have been carried out independently, nevertheless a deeper understanding of the tradeoffs involved between the rates and kinetics should be obtained. This work evaluates the use of different collectors (conventional collector (CC), biosolids (and their main components), and mixtures of CC and biosolids main components) in the froth flotation of copper sulfide ores. Tests were carried out in Denver Cells, at fixed collector, frother, and pH levels, in order to estimate metallurgical and kinetic parameters. In rougher flotation tests, biosolids show to be the most efficient non-CCs, achieving Cu recoveries of 64.1%. CC achieved 76.2% Cu recoveries while none of the pure biosolids main components achieved Cu recoveries over 60%. In the kinetics studies, only the partial replacement of CC (by 50% of Humic Acids (HAs) or biosolids) allowed a similar copper recovery once compared with CC (~81% Cu to be obtained with a fast kinetic constant of ~0.88 min−1). For molybdenum, partial replacement of CC produced better recovery and kinetics constants (k of 0.83 min−1 and R∞ of 66.10% for 50% CC - 50% HAs; k of 0.90 min−1 and R∞ of 61.79% for 50% CC - 50% biosolids). Results show that different combinations of biosolids - CC or HAs - CC could achieve optimal flotation conditions. As evaluated, an optimal combinations would allow considerable reductions in energy and chemical consumption. © 2019 Elsevier Ltd
dc.language.isoen
dc.publisherAcademic Press
dc.subjectBiosolids as ore collector
dc.subjectCopper and molybdenum concentrates
dc.subjectFlotation kinetics
dc.subjectFroth flotation collectors
dc.subjectGreen chemistry
dc.subjectRecovery
dc.subjectcopper derivative
dc.subjectcopper sulfide
dc.subjecthumic acid
dc.subjectmolybdenum
dc.subjectunclassified drug
dc.subjectcopper
dc.subjectsulfide
dc.subjectbiosolid
dc.subjectbyproduct
dc.subjectconcentration (composition)
dc.subjectcopper
dc.subjectcost analysis
dc.subjectenvironmental issue
dc.subjecthazardous waste
dc.subjecthumic substance
dc.subjectmolybdenum
dc.subjectpollutant removal
dc.subjectreaction kinetics
dc.subjectsulfide
dc.subjectwaste disposal
dc.subjectArticle
dc.subjectbiosolid
dc.subjectcell pH
dc.subjectflotation
dc.subjecthumic substance
dc.subjectindustrial waste
dc.subjectkinetic parameters
dc.subjectmetallurgy
dc.subjectkinetics
dc.subjectCopper
dc.subjectHumic Substances
dc.subjectKinetics
dc.subjectSulfides
dc.titleUse of humic substances in froth flotation processes
dc.typeArticle


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