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Full-Text Articles in Engineering

Selective Precipitation And Recovery Of Rare Earth Elements From Acid Mine Drainage, Robyn Lauren Christoferson Jan 2020

Selective Precipitation And Recovery Of Rare Earth Elements From Acid Mine Drainage, Robyn Lauren Christoferson

Graduate Theses, Dissertations, and Problem Reports

The ability to secure rare earth elements (REEs) in the United States is of concern due to the rapid growth in demand and the monopolistic supply chain. The demand for REEs has skyrocketed in recent years due to the development of many green technologies. The United States and many other countries are currently reliant on China for REEs, who currently control greater than 90% of the global supply. Due to the severe impact of previous Chinese export quotas, it is important to lessen the reliance on importation and explore methods of recycling REEs from secondary sources. A secondary REE source …


Innovative Fe(Iii)-Dosed Anaerobic Biological Treatment System: From Fe And S Biogeochemical Reactions To Engineering Process, Musfique Ahmed Jan 2020

Innovative Fe(Iii)-Dosed Anaerobic Biological Treatment System: From Fe And S Biogeochemical Reactions To Engineering Process, Musfique Ahmed

Graduate Theses, Dissertations, and Problem Reports

In moving toward more sustainable wastewater management, anaerobic treatment is gaining increasing popularity due to its simplicity, low energy requirement, low sludge production and less emission of greenhouse gases compared to typical aerobic wastewater treatment systems. Electron acceptors such as nitrate, sulfate, and CO2 have been used in various anaerobic processes for removal of organic matters from wastewater under anoxic or anaerobic environments. In energy producing regions, ferric iron, Fe(III), is a predominant element in iron containing wastes such as acid mine drainage (AMD) and coal ash, which can potentially be used as a source of iron in novel …