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Development of liquid–liquid extraction processes for concentrated hydrometallurgical solutions
(Lappeenranta-Lahti University of Technology LUT, 2023-01-20)
Hydrometallurgical liquid–liquid extraction is a separation and purification method used for the recovery of metals from aqueous solutions. In this thesis, process design methods were studied and evaluated for the development ...
Dissolution of magnetite and hematite in acid mixtures
(Lappeenranta-Lahti University of Technology LUT, 2022-11-04)
As the quality of raw materials decreases and legislation tightens, interest in various alternative materials has grown. For example, raw materials often contain iron as an impurity, which must be removed before the actual ...
Methanol synthesis via CO2 hydrogenation in a periodically operated multifunctional reactor
(Lappeenranta-Lahti University of Technology LUT, 2022-12-02)
Recognising the unsustainable nature of the current production practices, the global economy is now steering away from fossil energy sources. Although wind and solar energy have seen tremendous improvements over the past ...
Research advancements and future needs of microplastic analytics: microplastics in the shore sediment of the freshwater sources of the Indian Himalaya
(Lappeenranta-Lahti University of Technology LUT, 2022-11-15)
Microplastics (MPs) are commonly considered pieces of plastic particles that are between 1 μm and 5 mm in size. It is an emerging contaminant and highly pervasive in different environmental compartment. Likewise, MPs have ...
Reactive crystallisation studies of CaCO3 processing via a CO2 capture process : real-time crystallisation monitoring, fault detection, and hydrodynamic modelling
(Lappeenranta-Lahti University of Technology LUT, 2022-11-04)
Currently, a broad spectrum of decarbonisation efforts are ongoing in fundamental areas of human lifestyle to mitigate the global concerns materialising from climate-related transformations. Within the framework of carbon ...
Valorization of sludge materials after chemical and electrochemical treatment
(Lappeenranta-Lahti University of Technology LUT, 2022-10-24)
Wastewater sludge requires effective dewatering, lower metal content, retention of nutrients, and biological stability prior to use for other applications. This thesis presents a comprehensive sludge treatment study by ...
Electrochemical recovery of rare-earth elements from NdFeB magnets
(Lappeenranta-Lahti University of Technology LUT, 2022-12-09)
The use of the rare-earth elements (REEs) is steadily increasing and, on the other hand, possibilities for their substitution in modern advanced technologies, especially in green energy applications, are limited. Recently, ...
Fast contact copper extraction
(Lappeenranta-Lahti University of Technology LUT, 2022-12-19)
The intensification of copper solvent extraction was examined in this thesis. Extraction with hydroxyoximes is used in industry for copper separation. The reaction between hydroxyoxime and copper is a two-phase interfacial ...