Metal Removal from Acid Waters by an Endemic Microalga from the Atacama Desert for Water Recovery

Galár-Martínez, Marcela; Leyton, Yanett; Cisternas, Luís A.; Riquelme, Carlos

doi:10.3390/min8090378

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…In this hypersaline region between Bolivia, Chile, and Argentina, some microalgae species have been detected [ 75 , 76 ]. Recently, a microalga isolated from the Atacama Desert (Chile), part of the Lithium Triangle, has been proposed as a tool for mining waste bioremediation [ 77 ]. Extremophile and extremotolerant species living there may possess mechanisms that could lead to increased capture or fractionation.…”

Section: Discussionmentioning

confidence: 99%

The Upcoming 6Li Isotope Requirements Might Be Supplied by a Microalgal Enrichment Process

et al. 2021

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Lithium isotopes are essential for nuclear energy, but new enrichment methods are required. In this study, we considered biotechnology as a possibility. We assessed the Li fractionation capabilities of three Chlorophyte strains: Chlamydomonas reinhardtii, Tetraselmis mediterranea, and a freshwater Chlorophyte, Desmodesmus sp. These species were cultured in Li containing media and were analysed just after inoculation and after 3, 12, and 27 days. Li mass was determined using a Inductively Coupled Plasma Mass Spectrometer, and the isotope compositions were measured on a Thermo Element XR Inductively Coupled Plasma Mass Spectrometer. The maximum Li capture was observed at day 27 with C. reinhardtii (31.66 µg/g). Desmodesmus sp. reached the greatest Li fractionation, (δ6 = 85.4‰). All strains fractionated preferentially towards 6Li. More studies are required to find fitter species and to establish the optimal conditions for Li capture and fractionation. Nevertheless, this is the first step for a microalgal nuclear biotechnology.

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Section: Discussionmentioning

confidence: 99%

The Upcoming 6Li Isotope Requirements Might Be Supplied by a Microalgal Enrichment Process

et al. 2021

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“…The water samples corresponded to the flow obtained from Instituto de Ciencias Naturales A. von Humboldt of Universidad de Antofagasta and were pretreated with a UV filter to eliminate organic compounds and successive physical filter (0.5 µm) for solid suspension removal. However, the literature about the salinity concentrate indicated a historical variability in San Jorge Bay between 34 and 36 g/L [85][86][87]. The methodology was applied to two mineralogical samples named Case 1 and Case 2.…”

Section: Description Of the Cases And Experimental Setupmentioning

confidence: 99%

Response Surface Methodology for Copper Flotation Optimization in Saline Systems

et al. 2022

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Response surface methodology (RSM) is one of the most effective tools for optimizing processes, and it has been used in conjunction with the Analysis of Variance (ANOVA) test to establish the effect of input factors on output factors. However, when this methodology is used in mineral flotation, its polynomial model usually performs poorly. An alternative is to use artificial neural networks (ANNs) in such situations. Within this context, the ANOVA test is not the best option for these model types; moreover, it requires statistical assumptions that are difficult to satisfy in flotation. This work proposes replacing the polynomial model of the RSM with ANNs and the Sobol methods to determine the influential input factors instead of the ANOVA test. This proposal is applied to two porphyry copper ores with a high content of pyrite, clay, and dilution media. In addition, this study shows how other computational intelligence techniques, such as swarm intelligence, can be incorporated into this type of problem to improve the learning process of ANNs. The results gave an adjustment of over 0.98 for R2 using ANNs, in comparison to values of around 0.5 when the polynomial model of RSM was utilized. On the other hand, the application of Global Sensitivity Analysis (GSA) identified the aeration rate and P80 size as the most influential variables in copper recovery under the conditions studied. Additionally, we identified significant interactions that affect the recovery of copper, with the interactions between the aeration rate, frother concentration, and P80 size being the most important.

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Mine drainage: Treatment technologies and rare earth elements

Wei

Zhang

Shimko³

et al. 2019

Water Environment Research

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The recent research and development on mine drainage published in 2018 was summarized in this annual review. In particular, this review was focused on two main aspects of mine drainage: (a) advances in treatment technologies and (b) rare earth elements in mine drainage and its recovery. The first section covers passive treatment technologies and active treatment options, including physiochemical treatment and biological treatment. The second section includes the characterization of rare earth elements in mine drainage and recovery technologies. Due to the importance of rare earth elements and the growing interest in their recovery from mine drainage, rare earth elements are reported as a separate section for the first time in this review.Practitioner points Advances in treatment technologies for mine drainage are reviewed. Rare earth elements in mine drainage and its recovery are summarized. Reviewed technologies include passive, active, advanced and novel processes.

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Metal Removal from Acid Waters by an Endemic Microalga from the Atacama Desert for Water Recovery

Cited by 6 publications

References 36 publications

The Upcoming 6Li Isotope Requirements Might Be Supplied by a Microalgal Enrichment Process

The Upcoming 6Li Isotope Requirements Might Be Supplied by a Microalgal Enrichment Process

Response Surface Methodology for Copper Flotation Optimization in Saline Systems

Mine drainage: Treatment technologies and rare earth elements

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