Blar i NTNU Open på forfatter "Kota, Hanumantha Rao"
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Alginates as Green Flocculants for Metal Oxide Nanoparticles
Slabov, Vladislav; Jain, Garima; Chernyshova, Irina; Kota, Hanumantha Rao; Ertesvåg, Helga (Peer reviewed; Journal article, 2023)Flocculation is used for the removal or separation of colloids, e.g. in water treatment and mineral processing. Alginates are linear, anionic biopolymers composed of mannuronic (M) and guluronic (G) acids. The relative ... -
Application of glucolipid bola-amphiboles biosurfactant in mineral processing
Dhar, Priyanka; Chernyshova, Irina; Thornhill, Maria; Roelants, Sophie; Soetaert, Wim; Kota, Hanumantha Rao (Chapter, 2021)Yeast-derived amphiboles have attracted considerable attention for their applications in various industrial sectors. However, only a few studies on this class of surfactant have been reported to be relevant to mineral ... -
Comparison of single and mixed reagent systems for flotation of copper sulphides from Nussir ore
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Peer reviewed; Journal article, 2019)The present study investigates the application of thiol collectors and their mixtures on the flotation of copper-silver-gold minerals from a new copper mine located in northern Norway. The copper minerals (chalcopyrite, ... -
Green foam-based methods of mineral and ion separation
Jain, Garima; Havskjold, Håkon; Dhar, Priyanka; Ertesvåg, Helga; Chernyshova, Irina; Kota, Hanumantha Rao (Chapter, 2020)We discuss an important gap in the literature on progress toward the development of green (microbial-derived) reagents in conventional (froth flotation) and emerging (foam flotation)separation methods. For comparison, we ... -
Investigation of copper recovery from a new copper deposit (Nussir) in northern Norway
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Peer reviewed; Journal article, 2019)Norway has seen an upsurge of interest in exploiting its mineral deposits during the last decade. One of the major areas of interest is a huge copper deposit, operated by Nussir ASA located in the Repparfjord tectonic ... -
Investigation of Copper Recovery from a New Copper Deposit (Nussir) in Northern-Norway: Thionocarbamates and Xanthate-Thionocarbamate Blend as Collectors
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Journal article; Peer reviewed, 2019)Norway has newly seen an upsurge of interest in exploiting its mineral deposits influenced by fresh Government focus and survey support for previously under-prospected areas. One of the major areas of interest is a huge ... -
Investigation of Copper Recovery from a New Copper Ore Deposit (Nussir) in Northern Norway: Dithiophosphates and Xanthate-Dithiophosphate Blend as Collectors
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Journal article; Peer reviewed, 2019)he Norwegian mining industry is currently showing increasing interest in the production of metals. Recent research has demonstrated promising results identifying the high potential of the Nussir deposit for the production ... -
Linking molecular structures of yeast-derived biosurfactants with their foaming, interfacial, and flotation properties
Dhar, Priyanka; Thornhill, Maria; Roelants, Sophie; Soetaert, Wim; Chernyshova, Irina V.; Kota, Hanumantha Rao (Peer reviewed; Journal article, 2021)Yeast-derived bola amphiphiles have attracted growing attention in various industrial sectors as green reagents. However, their physico-chemical properties relevant to mineral separation by froth flotation are poorly ... -
An overview of calcite recovery by flotation
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Peer reviewed; Journal article, 2020)In general, precipitated calcium carbonate (PCC) is used as amineral filler in paper industries; while natural calcite (CaCO3) ore is also suitable for industrial use if it is a finely ground high-grade material. Naturally, ... -
Purification of High-grade Calcite Ore by Flotation with Alkyl Diamines
Dhar, Priyanka; Thornhill, Maria; Kota, Hanumantha Rao (Peer reviewed; Journal article, 2018)A very high-grade calcite deposit located in northern Norway consists of CaCO3 ore with minor silicate and sulphide impurities. Cationic (Tallow-1,3-diaminopropane, Duomeen T) collector has been used in the purification ... -
Studies of nanoparticles-bacteria interactions to develop potential bio-based reagents for separation of fine mineral particles.
Jain, Garima (Doctoral theses at NTNU;2022:284, Doctoral thesis, 2022)The increasing demand for minerals worldwide and the depletion of high-grade ores necessitate the extraction of minerals from low-grade ores. This requires processing the low-grade ores to fine and ultra-fine particles to ... -
Toward Green Flotation: Interaction of a Sophorolipid Biosurfactant with a Copper Sulfide
Dhar, Priyanka; Havskjold, Håkon; Thornhill, Maria; Roelants, Sophie; Soetaert, Wim; Kota, Hanumantha Rao; Chernyshova, Irina (Peer reviewed; Journal article, 2020)The United Nations’ Sustainable Development Goals have sparked growing interest in biosurfactants from many surfactant-loaded industries including those utilizing froth flotation for mineral separation. However, the ...