scholarly journals Biorecycling of Precious Metals and Rare Earth Elements

Nanomaterials ◽  
10.5772/25653 ◽  
2011 ◽  
Author(s):  
Kevin Deplanche ◽  
Angela Murray ◽  
Claire Mennan ◽  
Scott Taylor ◽  
Lynne Macaskie
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Precious Metals

Precious metals and rare earth elements in municipal solid waste – Sources and fate in a Swiss incineration plant

2013 ◽  
Vol 33 (3) ◽  
pp. 634-644 ◽  
Author(s):  
Leo S. Morf ◽  
Rolf Gloor ◽  
Olaf Haag ◽  
Melanie Haupt ◽  
Stefan Skutan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Precious Metals ◽  
Incineration Plant

scholarly journals Analyzing the Rare Earth Elements (REEs) and Trace Metals in Tailings

2019 ◽  
Vol 2 (2) ◽  
pp. 17-18
Author(s):  
Rachel Butler ◽  
Deepak Pudasainee ◽  
Monir Khan ◽  
Rajender Gupta
Keyword(s):  
Rare Earth ◽  
Trace Metals ◽  
Rare Earth Elements ◽  
Inductively Coupled Plasma ◽  
Fine Particles ◽  
Precious Metals ◽  
Current Approach ◽  
Oil Sand ◽  
Water Solvent ◽  
Tailings Ponds

In the process of producing bitumen from oil sand, a by-product called tailings is produced. Tailings are a mixture of clay, fine particles, water, solvent and residual bitumen. The industry’s current approach is to leave them in tailings ponds; however, that may cause environmental impacts to the ecosystems around them due in part to the toxic trace metals found in them. Research has shown that there are also valuable rare Earth elements (REEs) present in tailings. REEs found in tailings include Cerium, Neodymium, Lanthanum etc. Iron, Titanium, and Zirconium are not considered REEs but are still valuable enough to be extracted. The objective of this research was to determine the concentration of REEs and trace metals in bitumen froth treatment tailings (FTT). Our research team used acid digestion and inductively coupled plasma mass spectroscopy (ICP-MS) to measure the concentration of REEs and trace metals in several samples of FTT ash. We learned that Cerium was the most prevalent REE in tailings samples (>1000ppm), followed by Neodymium and Lanthanum. Zirconium was the most prevalent trace metal found in this tailings sample (>1000ppm), followed closely by Vanadium. Knowing the exact concentration of harmful trace metals in tailings will allow us to determine the extent of tailings ponds environmental effect and toxicity. Collecting and selling expensive metals found in tailings could be the start of a new precious metals economy in Alberta, which would provide new investment opportunities and jobs. This would also encourage corporations to invest in finding new ways to extract these precious metals, resulting in more purified tailings and less tailings overall going into tailings ponds.

scholarly journals Comparative life cycle analysis for value recovery of precious metals and rare earth elements from electronic waste

2019 ◽  
Vol 149 ◽  
pp. 20-30 ◽  
Author(s):  
Zhen Li ◽  
Luis A. Diaz ◽  
Zhiyao Yang ◽  
Hongyue Jin ◽  
Tedd E. Lister ◽  
...  
Keyword(s):  
Rare Earth ◽  
Life Cycle ◽  
Rare Earth Elements ◽  
Life Cycle Analysis ◽  
Electronic Waste ◽  
Precious Metals ◽  
Value Recovery

scholarly journals Principal component analysis of rare earth elements in Sechahun iron deposit, central Iran.

2018 ◽  
Vol 6 (2) ◽  
pp. 205
Author(s):  
Mohammadali Sarparandeh ◽  
Ardeshir Hezarkhani
Keyword(s):  
Principal Component Analysis ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Precious Metals ◽  
Principal Component ◽  
Component Analysis ◽  
Central Iran ◽  
Iron Deposit ◽  
Geochemical Exploration ◽  
Specific Element

Principal component analysis (PCA) is a sufficient way for finding the groups of correlated features. In geochemical exploration of precious metals, it helps to cluster the elements. Especially for rare earth elements (REEs), because of multiplicity of parameters, the proposed method helps to have a better interpretation. Geochemical exploration programs aim to find the hidden information about specific element(s), its abundance, its behavior and its relation with minerals and some other elements. REEs are a group of elements with same chemical behavior. However, some chemical characteristics of light rare earth elements (LREEs) and heavy rare earth elements (HREEs) are different. In this study, relationship between these elements was investigated by applying PC analysis method in Kiruna-type iron ore deposit of Se-Chahun in Central Iran. The four first PCs covered the most variances of the REEs. All the elements showed a correlation together with exception of La, Ce, Nd, Yb and Y. Results of PC analysis are related to the anomaly of Rare earth elements. It can be concluded that in anomalous areas, loadings of the principal components are affected by variance and anomalous content of the elements.  

Microbially Supported Recovery of Precious Metals and Rare Earth Elements from Urban Household Waste Incineration Slag

2015 ◽  
Vol 1130 ◽  
pp. 652-655
Author(s):  
E. Marie Muehe ◽  
Caroline Schmidt ◽  
Jing He ◽  
Thomas Helle ◽  
Andreas Kappler
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Extraction Efficiency ◽  
Precious Metals ◽  
Waste Incineration ◽  
Metal Extraction ◽  
Household Waste ◽  
Urban Household ◽  
Ph Values ◽  
Financial Pressure

The use of precious metals and Rare Earth Elements in electronic, medical, and automobile industries is drastically increasing. To meet this demand and to escape the financial pressure of the global metal market, not only mining activities but recently also the recovery of these elements from industrial and urban household waste is in the focus of research. It has been shown that the application of extracting solutions with pH values lower than 4 lead to an economically feasible recovery of industrially precious metals. It is unclear, however, whether and to which extent this abiotic extraction efficiency can potentially be increased by using microorganisms capable of dissolving more stable minerals at low pH. The goal of this project therefore is to first view urban household waste as a resource for metals and evaluate combined abiotic and biotic extraction procedures for an increase in metal extraction efficiency.

scholarly journals Determination of Metal Content of Waste Mobile Phones and Estimation of Their Recovery Potential in Turkey

2019 ◽  
Vol 16 (5) ◽  
pp. 887 ◽  
Author(s):  
Merve Sahan ◽  
Mehmet Kucuker ◽  
Burak Demirel ◽  
Kerstin Kuchta ◽  
Andrew Hursthouse
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mobile Phones ◽  
Inductively Coupled Plasma ◽  
Precious Metals ◽  
Optical Emission ◽  
Critical Metals ◽  
Recovery Potential ◽  
Research Activities

Waste mobile phones constitute one of the fastest growing Waste Electrical and Electronic Equipment (WEEE) types all over the world due to technological innovations and shortening of their life span. They contain a complex mix of various materials, such as basic metals, precious metals and rare earth elements and represent an important secondary raw metal source. The main objectives of this study were to characterize the metal concentration of waste mobile phones by optimizing the inductively coupled plasma optical emission spectrometer (ICP-OES) operation parameters and estimate the metal recovery potential of waste mobile phones in Turkey. Therefore, selected mobile phone samples collected from a recycling center in Turkey were analyzed to determine their metal concentrations. Then, the theoretical recovery potentials of precious and rare earth metals from waste mobile phones were estimated for Turkey. The analytical methods optimized in this study can help further research activities to obtain comprehensive data for determination of the critical metals (precious metals and rare earth elements) in WEEE samples so that proper recycling and recovery strategies can be selected and implemented.

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