Search Results - "Petersen, Jochen"

E-waste in the international context – A review of trade flows, regulations, hazards, waste management strategies and technologies for value recovery by Ilankoon, I.M.S.K., Ghorbani, Yousef, Chong, Meng Nan, Herath, Gamini, Moyo, Thandazile, Petersen, Jochen

“…•Proactive and efficient management of e-waste at global-scale is compulsory.•Trans-boundary e-waste movement does not support sustainable waste management…”
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Waste not, want not - Pathways towards a circular economy in South Africa by Petersen, Jochen, Lötter, Aysha

“…Waste is the end-product of any material transformation process, biogenic or anthropogenic, and refers to material flows that are of no further use to the…”
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A Study on the Applicability of Agitated Cyanide Leaching and Thiosulphate Leaching for Gold Extraction in Artisanal and Small-Scale Gold Mining by Archippe Ngwey Manzila, Thandazile Moyo, Jochen Petersen

“…Mercury amalgamation is the method of choice to recover gold in artisanal and small-scale gold mining (ASGM). However, despite the low cost and simplicity of…”
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Solvent Extraction Studies of Copper from a Heap Leach Liquor Using Mextral 5640H by Mostafa Hosseinzadeh, Jochen Petersen, Asghar Azizi

“…In this study the extractive capability of Mextral 5640H was investigated for extraction of copper from a heap leach liquor. In this regard, the influence of…”
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Barriers to recycling e-waste within a changing legal environment in South Africa by Moyo, Thandazile, Sadan, Zaynab, Lötter, Aysha, Petersen, Jochen

“…Electronic waste (e-waste) recycling presents an oppor tunity to reclaim materials from a secondary resource and to create jobs and other economic oppor…”
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Leaching and recovery of phosphate and rare earth elements from an iron-rich fluorapatite concentrate: Part II: Selective leaching of calcium and phosphate and acid baking of the residue by Soltani, Faraz, Abdollahy, Mahmoud, Petersen, Jochen, Ram, Rahul, Javad Koleini, S.M., Moradkhani, Davood

“…Apatite concentrate is an important source of phosphate and contains significant amounts of rare earth elements (REEs). In this study, the possibility of…”
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Conventional and electrochemical bioleaching of chalcopyrite concentrates by moderately thermophilic bacteria at high pulp density by Ahmadi, Ali, Schaffie, Mahin, Petersen, Jochen, Schippers, Axel, Ranjbar, Mohammad

“…Conventional and electrochemical bioleaching were investigated to extract copper from Sarcheshmeh chalcopyrite concentrate at high pulp densities. Experiments…”
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Selective Recovery of Copper from the Mixed Metals Leach Liquor of E-Waste Materials by Ion-Exchange: Batch and Column Study by Emmanuel A. Ajiboye, V. Aishvarya, Jochen Petersen

“…Recovery of metals from e-waste forms a major focus of circular economy thinking and aligns well with the Sustainable Development Goals (SDG). While…”
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Heap leaching as a key technology for recovery of values from low-grade ores – A brief overview by Petersen, Jochen

“…Heap leaching technology is finding increasingly widespread application to recover values from low-grade ores, especially in the gold and copper industry. The…”
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Use of X-ray computed tomography to investigate crack distribution and mineral dissemination in sphalerite ore particles by Ghorbani, Yousef, Becker, Megan, Petersen, Jochen, Morar, Sameer H., Mainza, Aubrey, Franzidis, J.-P.

“…► The crack distribution and mineral dissemination in ore particles determine the performance of the diffusion. ► X-ray CT has indicated the potential for the…”
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From understanding the rate limitations of bioleaching mechanisms to improved bioleach process design by Petersen, Jochen

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Recovery of Pt, Pd, and Rh from spent automotive catalysts through combined chloride leaching and ion exchange: A review by Hosseinzadeh, Mostafa, Petersen, Jochen

“…Three platinum group metals (PGMs), platinum (Pt), palladium (Pd), and rhodium (Rh), are key components in automotive catalytic convertors, playing a pivotal…”
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A multiple mechanism model for measuring extra‐ and intraparticle mass transport in ion exchange resins by Nesbitt, Allan, Petersen, Jochen

“…A diffusion‐based kinetic model for resin‐based ion exchange is proposed that simultaneously describes extra‐ and intraparticle diffusion for the purpose of…”
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An investigation of the leaching of Pt and Pd from cooperite, sperrylite and column bioleached concentrates in thiocyanate-cyanide systems by Shaik, Kathija, Petersen, Jochen

“…This study investigates the effectiveness of a combined thiocyanate-cyanide leach system in Pt and Pd containing minerals with a view to simplifying the…”
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Heap Leaching Technology-Current State, Innovations, and Future Directions: A Review by Ghorbani, Yousef, Franzidis, Jean-Paul, Petersen, Jochen

“…Heap leaching is a well-established extractive metallurgical technology enabling the economical processing of various kinds of low-grade ores, which could not…”
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Editorial: Special Issue for the 24th International Biohydrometallurgy Symposium (IBS 2022) by Kaksonen, Anna H., Cheng, Ka Yu, Petersen, Jochen

“…•Selected papers from IBS 2022 conference were featured in this special issue.•Topics cover bioleaching, waste valorisation and biotechnical mine water…”
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A brief overview on the dissolution mechanisms of sulfide minerals in acidic sulfate environments at low temperatures: Emphasis on electrochemical cyclic voltammetry analysis by Zhang, Yisheng, Zhao, Hongbo, Qian, Lu, Sun, Menglin, Lv, Xin, Zhang, Luyuan, Petersen, Jochen, Qiu, Guanzhou

“…•The dissolution mechanisms of several sulfide minerals are summarized.•The electrochemical CV studies of various minerals are shown.•The inhibition factors…”
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Determination of oxygen gas–liquid mass transfer rates in heap bioleach reactors by Petersen, Jochen

“…A detailed experimental study is described which was conducted to determine the rate of oxygen gas–liquid mass transfer within the packed bed of heap bioleach…”
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Characterisation of a rare earth element- and zirconium-bearing ion-adsorption clay deposit in Madagascar by Ram, Rahul, Becker, Megan, Brugger, Joël, Etschmann, Barbara, Burcher-Jones, Cody, Howard, Daryl, Kooyman, Patricia J., Petersen, Jochen

“…The Ambohimirahavavy igneous complex (Ampasibitika intrusion) in Madagascar hosts a world-class rare-earth element (REE) bearing ion-adsorption clay (IAC)…”
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Potential for solar thermal energy in the heap bioleaching of chalcopyrite in Chilean copper mining by Murray, Clare, Platzer, Werner, Petersen, Jochen

“…•Solar heating of heap leach liquor can boost heap leach performance.•Combination of solar thermal and sulphide heap leach models to explore optimal…”
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