Helmholtz Institute Freiberg for Resource Technology
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Supporting data and supplementary material for the cumulative dissertation: "Mechanistic insights and process-level optimization and upscaling of novel reagents in flotation: Colloidal silica as a calcite depressant in the froth flotation of semi-soluble salt-type minerals
No full textTitle:
Supporting Data and Supplementary Material for the Cumulative Dissertation: "Mechanistic Insights and Process-Level Optimization and Upscaling of Novel Reagents in Flotation: Colloidal Silica as a Calcite Depressant in the Froth Flotation of Semi-Soluble Salt-Type Minerals"
Author:
Borhane Ben Said – Helmholtz-Institut Freiberg für Ressourcentechnologie, TU Clausthal
ORCID: 0000-0002-1976-3417
Contact: [email protected]
Date of Deposit: August 2025
Related Publications:
Publication 1: Nanoparticle depressants in froth flotation – The effect of colloidal silica with different size and surface modifications on the selective separation of semi-soluble salt type minerals (Colloids and Surfaces A, 2024)
Publication 2: Upscaling and optimization of reagents systems in froth flotation: A DoE and numerical-optimization-based methodology (Minerals Engineering, 2025)
Publication 3: From Pulp to Froth: Decoding the Role of Nanoparticle Colloidal Silica in Scheelite Flotation as a Calcite Depressant (Minerals, 2025)
This repository contains datasets, supplementary materials, and related documents supporting the experiments, analyses, and findings presented in the cumulative PhD thesis.
The dataset may be used for verification of results or further analysis. Please cite the dataset and associated publications
Data Publication: Experimental investigation of aerosol separation in a rising Taylor bubble
No full text– Flow images: A ZIP file containing bitmap (.bmp or .tif) images of the flow for five different experimental scenarios.
– Particle concentration and aerosol diameter: Files providing the measured particle concentration (in μg/m³ particles/cm³) and the corresponding aerosol diameters (in micrometers)
Data publication: Investigation of the interactions of microorganisms with uranium in anthropogenic contaminated waters as basis for the development of a bioremediation technology. (Investigación de las interacciones de los microorganismos con el uranio en aguas contaminadas de origen antropogénico como base para el desarrollo de una tecnología de biorremediación)
No full textThis dataset supports the investigation of microbial interactions with uranium in anthropogenically contaminated waters. It includes experimental results, microbial community analyses, geochemical characterizations, and spectroscopic data used to evaluate uranium reduction and immobilization processes. The data serve as a foundation for the development of bioremediation technologies aimed at mitigating uranium contamination
Data publication: Matlab scripts for PSD measurments and rate spectra analysis
No full textThe open datasets provide the Matlab scripts for the calculation of Power Spectra Density and Rate Spectra in the manuscirpt 'How crystal surface reactivity controls the evolution of surface microtopography during dissolution'
Data publication: Dual wetting electrode surfaces for alkaline water electrolysis
No full textTuning the electrode surfaces for better bubble management is a promising approach to increase the efficiency of alkaline water electrolysis. Therefore, Direct Laser Writing was used to structure Nickel electrodes with a dual wetting surface. The applied pillar-like structure combines superhydrophilic behavior and strong spreading of the liquid across the electrode with hydrophobic bubble nucleation sites. In addition, the electrochemically active surface area is increased by a factor of 9. As a result, the overpotential has been significantly reduced, while the size of the detached bubble has increased. The present data set compares three different electrodes, a non-structured reference electrode and two laser structured electrodes with different depths of the structure, at applied current densities of j = -20, -50 and -100 mA/cm² in terms of electrode potential, detached bubble size and number of nucleation sites. As electrolyte 1 M KOH was used. All experiments were carried out under ambient conditions (T = 293 K,p = 1 bar).
Description of Data.zip:
An overview of all performed experiments is given in the file Summary.csv. The data is analyzed as described in the corresponding journal publication Dual wetting electrode surfaces for alkaline water electrolysis. Each data set is stored in a .hdf5-file, with the relevant metadata incorporated into the attributes assigned to the groups/datasets within the .hdf5-file. The data files are structured in groups as follows:
Electrochemical Measurement Data
Galvanostatic Measurement Data
CV double-layer capacitance
LSV onset potential
Results
Detected Bubbles Sideview
Sideview Raw Images (only for SH2_LS_Pil_01.hdf5)
With the exception of a single comprehensive data set comprising unprocessed images (SH2_LS_Pil_01.hdf5), the remaining raw images from all performed measurements can be made available upon request.This project is supported by the Federal State of Saxony in terms of the "European Regional Development Fund" (H2-EPF-HZDR), the Helmholtz Association Innovation pool project "Solar Hydrogen", the Hydrogen Lab of the School of Engineering of TU Dresden, and BMBF (project ALKALIMIT, grant no. 03SF0731A)
(Data set) Fermi-liquid behavior of non-altermagnetic RuO2
No full text1) Data set of the figures in main text and supplementary - Originlab format (Origin Viewer can be used to open these files).
2) FPLO calculations for the representation of the nodal line
Data publication: Roadmap on Advanced/operando characterisation of solid state materials and devices for energy applications - Positron annihilation spectroscopy
No full textPositron annihilation spectroscopy (PAS) is a precise probe of point defects in bulk and nanomaterials, e.g., thin films. Positrons localize predominantly in the neutral and negatively charged open volume defects, i.e., vacancies and their agglomerations, extended defects, pores. The time to the inevitable annihilation of the positron with electron depends on the local electron density and scales proportionally with the open volume size. In insulators containing pores, Positronium (Ps) formation is enabled, so that the lifetime of the resulting ortho-Ps population again scales proportionally with pore size. Employing mono-energetic positron beams enables the study of near-surface buried defects. Positrons pre-accelerated to a given kinetic energy are implanted into solids following the so-called Makhov distribution [Fig. 1b]. Once localized in a defect, the positron lifespan increases and the overlap of the positron density with the core electron density is reduced. As a consequence, the Doppler shift of annihilation gamma rays becomes smaller. These characteristics are measured using two major techniques, namely positron annihilation lifetime spectroscopy (PALS) and coincidence Doppler broadening spectroscopy (cDBS or cDB-PAS), respectively. The analysis of the positron lifetime spectra [Fig. 2a] enables a decomposition into exponential components characterized by lifetime (ti) and intensity (Ii), which can be translated into defect type/size and concentration. Whereas the shape analysis of the broadened 511 keV annihilation spectrum provides insights to positron annihilation with low momentum valence electrons and high momentum core electrons. The latter determines the local chemical environment of positron annihilation sites (Fig. 2b), which is relevant for characterization of fusion materials. Here we present the research data for figures 1b, 2a, and 2b
Electronic Supplementary Data of the Doctoral Thesis of Nils Reinhardt entitled "Mineral systems analysis of magmatic-hydrothermal skarn mineralization in the Schwarzenberg District, Germany"
No full textElectronic supplementary material related to the dissertation entitled “Mineral systems analysis of magmatic-hydrothermal skarn mineralization in the Schwarzenberg District, Germany” authored by Nils Reinhardt. The data contains the electronic supplementary material for chapters 3, 4, and 5, respectively, as noted in the respective file names.European Social Fund, grant no. 100339454 awarded to Mathias Burisc
Data publication: Chemical potential of the warm dense electron gas from ab initio path integral Monte Carlo simulations
No full textThis repository contains the PIMC results from the publication "Chemical potential of the warm dense electron gas from ab initio path integral Monte Carlo simulations" as they are presented in the corresponding figures
Multiphase Python Repository by HZDR
No full textThe python package provides several routines and scripts required to operate the code and cases repositories containing additional code and set-ups for the open-source software released by the OpenFOAM Foundation. This includes among others utilities for pre- and post-processing of simulation cases, utilities to launch virtual environments containing the source code, and utilities to operate the continuous integration and continuous development environment in a self-hosted Gitlab instance