Estudio termodinámico de la lixiviación de plomo reciclado con citrato de sodio

Villa, Lina; Agudelo, Wilmer Saldarriaga; Rojas, Nicolás Urbina

doi:10.19053/01217488.v9.n2.2018.7262

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…All of these can form soluble compounds with metals, releasing arsenates (Ruby et al 1993). For example, citrates are useful to recover Pb from batteries (Villa-Vargas 2017, Villa et al 2018, and acetates leach Pb from calcines (García-Villa 2016).…”

Section: Pbmentioning

confidence: 99%

Arsenic and Lead Bioaccessibilities Measured With a Novel Reactor System Using the Mexican Standard and Pbet Methods: Comparison With in Vivo and in Vitro Reported Data

García-Rodríguez

Gutiérrez-Ruíz

Ceniceros‐Gómez

2021

RICA

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Contaminated soils can become exposure routes of elements toxic to human beings. The health risk of a toxic element by ingestion depends on its bioavailability in the gastrointestinal system, measured in vivo or in vitro. This study aimed to use a novel, versatile reactor (gastrointestinal simulation reactor system to determine bioaccessibility -GSRSB-) to measure lead and arsenic bioaccessibility in the gastric and intestinal phases by applying a modified physiologically based extraction test (PBET). Three composite samples of polluted soils with As (0.50 - 3.25%) and Pb (0.02 - 0.10%) and the certified reference material NIST 2710 were analyzed with this GSRSB-PBET method and the NOM-147 Mexican standard method, which uses an end-over-end shaker. All results were compared to one another. The NIST 2710 results were contrasted with those reported in vivo and in vitro by 14 laboratories. The (GSRSB-PBET) gastric phase ranges were 35.9-55.1 % (As) and 59.6-96.1 % (Pb), while (NOM-147) gastric phases were 35.8-60.4 % (As) and 61.0-70.7 % (Pb). The (GSRSB-PBET) intestinal phase ranges were 39.5-46.9 % (As) and 19.9-31.5 % (Pb). The As and Pb compounds and the stirring technique seem to influence bioaccessibility. On the other hand, the comparison of NIST 2710 results with those reported in vitro and in vivo indicated that As and Pb gastric bioaccessibility obtained with GSRSB-PBET falls into the in vivo results range, while NOM-147 results are higher and fall outside the in vivo range, possibly overestimating the risk. Thus, the proposed method is adequate for modifying the current Mexican Standard Method (NOM-147), which only allows the calculation of Pb gastric bioavailability in vitro.

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Section: Pbmentioning

confidence: 99%

Arsenic and Lead Bioaccessibilities Measured With a Novel Reactor System Using the Mexican Standard and Pbet Methods: Comparison With in Vivo and in Vitro Reported Data

García-Rodríguez

Gutiérrez-Ruíz

Ceniceros‐Gómez

2021

RICA

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“…Lead-acid batteries (LABs) are the most used rechargeable batteries till now. It comprises about 60% of the world’s electric storage batteries [ 3 ]. Lead itself is toxic, and after the shelf life the Pb contaminated acid is thrown to the environment in most of the cases.…”

Section: Introductionmentioning

confidence: 99%

Rice powder template for hausmannite Mn3O4 nanoparticles and its application to aqueous zinc ion battery

Tonu,

Ahamed,

Yousuf

2024

PLoS ONE

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In this study, a simple calcination route was adopted to prepare hausmannite Mn3O4 nanoparticles using rice powder as soft bio-template. Prepared Mn3O4 was characterized by Fourier Transform Infra-Red Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray microanalysis (EDX), Powder X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET) and Solid state UV-Vis spectroscopic techniques. Mn-O stretching in tetrahedral site was confirmed by FTIR and Raman spectra. % of Mn and O content supported Mn3O4 formation. The crystallinity and grain size was found to be 68.76% and 16.43 nm, respectively; tetragonal crystal system was also cleared by XRD. TEM clarified the planes of crystal formed which supported the XRD results and BET demonstrated mesoporous nature of prepared Mn3O4 having low pore volume. Low optical band gap of 3.24 eV of prepared Mn3O4 nanoparticles indicated semiconductor property and was used as cathode material to fabricate CR-2032 coin cell of Aqueous Rechargeable Zinc Ion Battery (ARZIB). A reversible cyclic voltammogram (CV) showed good zinc ion storage performance. Low cell resistance was confirmed by Electrochemical Impedance Spectroscopy (EIS). The coin cell delivered high specific discharge capacity of 240.75 mAhg-1 at 0.1 Ag-1 current density. The coulombic efficiency was found to be 99.98%. It also delivered excellent capacity retention 94.45% and 64.81% after 300 and 1000 charge-discharge cycles, respectively. This work offers a facile and cost effective approach for preparing cathode material of ARZIBs.

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Thermodynamic Study of Leaching Conditions of Galena with Citrate Ions and Hydrogen Peroxide as Oxidizing Agent

et al. 2022

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Galena is the most important mineral for lead production, as it is the main source of lead in the world. Currently, the concentrates of this mineral are mainly treated using pyrometallurgical methods, creating several environmental problems, such as the generation of toxic and greenhouse gases. In addition, these processes involve high energy consumption, which limits their applicability. Hydrometallurgical routes are proposed as alternative processes for obtaining some metals such as silver, copper, gold, etc. The drawback of these processes is that the minerals tend to be passive in aqueous media. To mitigate this issue, researchers have used extreme conditions of pressure and temperature (6 atm. and 155 °C) or the use of very corrosive conditions. In this sense, the use of complexing agents that dissolve the metals of interest has been proposed. Citrate ion is one of the most promising complexing agents for galena leaching, obtaining high percentages of dissolution in relatively short times. Unfortunately, there has not been enough investigation about the concentration optimization of the complexing in the pH range from 5 to 9. In this sense, thermodynamic diagrams, such as the Pourbaix diagrams, are very useful for this purpose. Therefore, in this work, the effects of pH and temperature on the leaching of galena in citrate ion solutions are studied thermodynamically and experimentally. The experimental work was carried out with pure galena samples with a particle size of +149 − 74 µm (−100 + 200 mesh). The results show that higher recoveries were obtained working at a pH of 8 and at temperatures of 30 and 40 °C. The thermodynamic and experimental data demonstrated that the existence of an optimal concentration of citrate ion, due the extraction of lead from galena, has a greater reaction rate at a relatively low initial concentration of 0.3 M. This is due the formation of the complex lead citrate 1 (Pb(cit)−).

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Estudio termodinámico de la lixiviación de plomo reciclado con citrato de sodio

Cited by 3 publications

References 7 publications

Arsenic and Lead Bioaccessibilities Measured With a Novel Reactor System Using the Mexican Standard and Pbet Methods: Comparison With in Vivo and in Vitro Reported Data

Arsenic and Lead Bioaccessibilities Measured With a Novel Reactor System Using the Mexican Standard and Pbet Methods: Comparison With in Vivo and in Vitro Reported Data

Rice powder template for hausmannite Mn3O4 nanoparticles and its application to aqueous zinc ion battery

Thermodynamic Study of Leaching Conditions of Galena with Citrate Ions and Hydrogen Peroxide as Oxidizing Agent

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