Please use this identifier to cite or link to this item:
Main Title: Characterizing the Urban Mine—Challenges of Simplified Chemical Analysis of Anthropogenic Mineral Residues
Author(s): Mählitz, Paul Martin
Løvik, Amund N.
Figi, Renato
Schreiner, Claudia
Kuntz, Claudia
Korf, Nathalie
Rösslein, Matthias
Wäger, Patrick
Rotter, Vera Susanne
Type: Article
Language Code: en
Abstract: Anthropogenic mineral residues are characterized by their material complexity and heterogeneity, which pose challenges to the chemical analysis of multiple elements. However, creating an urban mine knowledge database requires data using affordable and simple chemical analysis methods, providing accurate and valid results. In this study, we assess the applicability of simplified multi-element chemical analysis methods for two anthropogenic mineral waste matrices: (1) lithium-ion battery ash that was obtained from thermal pre-treatment and (2) rare earth elements (REE)-bearing iron-apatite ore from a Swedish tailing dam. For both samples, simplified methods comprising ‘inhouse’ wet-chemical analysis and energy-dispersive Xray fluorescence (ED-XRF) spectrometry were compared to the results of the developed matrix-specific validated methods. Simplified wet-chemical analyses showed significant differences when compared to the validated method, despite proven internal quality assurance, such as verification of sample homogeneity, precision, and accuracy. Matrix-specific problems, such as incomplete digestion and overlapping spectra due to similar spectral lines (ICP-OES) or element masses (ICP-MS), can result in quadruple overestimations or underestimation by half when compared to the reference value. ED-XRF analysis proved to be applicable as semi-quantitative analysis for elements with mass fractions higher than 1000 ppm and an atomic number between Z 12 and Z 50. For elements with low mass fractions, ED-XRF analysis performed poorly and showed deviations of up to 90 times the validated value. Concerning all the results, we conclude that the characterization of anthropogenic mineral residues is prone to matrix-specific interferences, which have to be addressed with additional quality assurance measures.
Issue Date: 26-Jul-2019
Date Available: 12-Aug-2019
DDC Class: 333 Boden- und Energiewirtschaft
600 Technik, Technologie
Subject(s): multi-element chemical analysis
mineral residues
simplified chemical analyses
lithium battery ash
mining waste
urban mine
resource recovery
Sponsor/Funder: DFG, 414044773, Open Access Publizieren 2019 - 2020 / Technische Universität Berlin
EC/H2020/641999/EU/ Prospecting Secondary raw materials in the Urban mine and Mining waste/ProSUM
Journal Title: Resources
Publisher: MDPI
Publisher Place: Basel
Volume: 8
Issue: 3
Article Number: 132
Publisher DOI: 10.3390/resources8030132
EISSN: 2079-9276
Appears in Collections:FG Kreislaufwirtschaft und Recyclingtechnologie » Publications

Files in This Item:
File Description SizeFormat 
resources-08-00132.pdf1.17 MBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons