dagoer

• Nedkvitne, Eirik Nøst; Borgan, Ørnulf; Eriksen, Dag Øistein & Rui, Haakon Marius Vatten (2021). Variation in chemical composition of MSWI fly ash and dry scrubber residues. Waste Management. ISSN 0956-053X. 126, s. 623–631. doi: 10.1016/j.wasman.2021.04.007.
• Lerum, Hans Vigeland; Andersen, Niels Højmark; Eriksen, Dag Øistein; Hansen, Eddy Walther & Omtvedt, Jon Petter (2020). NMR study of the influence and interplay of water, HCl and LiCl with the extraction agent Aliquat 336 dissolved in toluene. Journal of Molecular Liquids. ISSN 0167-7322. 317. doi: 10.1016/j.molliq.2020.114160.
• Lerum, Hans Vigeland; Sand, Svetlana; Eriksen, Dag Øistein; Wibetoe, Grethe & Omtvedt, Jon Petter (2020). Comparison of single‑phase and two‑phase measurements in extraction, separation and back‑extraction of Cd, Zn and Co from a multi‑element matrix using Aliquat 336. Journal of Radioanalytical and Nuclear Chemistry. ISSN 0236-5731. 324, s. 1203–1214. doi: 10.1007/s10967-020-07168-8.
• Lerum, Hans Vigeland; Andersen, Niels Højmark; Eriksen, Dag Øistein; Hansen, Eddy Walther; Petersen, Dirk & Wibetoe, Grethe [Vis alle 7 forfattere av denne artikkelen] (2018). Study of Cadmium Extraction with Aliquat 336 from Highly Saline Solutions. Journal of Solution Chemistry. ISSN 0095-9782. 47(8), s. 1395–1417. doi: 10.1007/s10953-018-0795-z.
• Bakka, Arne Olav; Eriksen, Dag Øistein; Rugstad, Hans Erik & Bauer, R (1982). Identification of cadmium binding sites within living cells by perturbed angular correlation spectroscopy. FEBS Letters. ISSN 0014-5793. 139(1), s. 57–60.

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• Lehrum, Hans Vigeland; Andersen, Niels Højmark; Eriksen, Dag Øistein; Hansen, Eddy Walther & Omtvedt, Jon Petter (2020). NMR Studies of Aliquat 336 in toluene after contact with saline solutions - Determination of ionic content.
• Lerum, Hans V.; Sand, Svetlana; Eriksen, Dag Øistein; Hansen, Eddy Walther; Wibetoe, Grethe & Omtvedt, Jon Petter (2018). Determination of Distribution Ratios in Liquid-liquid Extraction of Hydrometallurgical Process Solutions using ICP-MS and Radiotracer Techniques.
• Bjørnstad, Tor; Stavsetra, Liv; Krivokapic, Alexander; Eriksen, Dag Øistein & Vascon, Alessio (2017). Hydrometallurgy in mineral mining and urban mining.
• Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein & Hansen, Eddy Walther [Vis alle 8 forfattere av denne artikkelen] (2016). Study of cadmium extraction from aqueous solutions with high chloride concentration using radiotracer and NMR .
• Lerum, Hans Vigeland; Bouzga, Aud Mjærum; Jørgensen, Sissel; Petersen, Dirk; Eriksen, Dag Øistein & Hansen, Eddy Walther [Vis alle 8 forfattere av denne artikkelen] (2016). LIQUID-LIQUID EXTRACTION OF CADMIUM CHLORIDE COMPLEXES STUDIED BY NMR.
• Raskovic-Lovre, Zeljka; Omtvedt, Jon Petter & Eriksen, Dag Øistein (2019). Extraction of zinc from highly saline and acidic solutions. Universitetet i Oslo.
• Kessel, Johanne Martine Sætha; Wibetoe, Grethe & Eriksen, Dag Øistein (2018). Recovery of Zinc from Municipal Solid Waste Fly Ash. Kjemisk Institutt, Universitetet i Oslo. Vis sammendrag

  The availability of many elements is decreasing due to extended use. One possible solution to this problem is the recovery of metals from waste. Fly ash from municipal solid waste (MSW) incineration contains many metals and can therefore be considered a resource. This project focuses on the recovery of zinc from MSW fly ash. A total analysis of the fly ash was performed using ICP-OES after decomposing the sample in a microwave oven. MSW fly ash contains silicates, and the content of the zinc trapped in the silicates was measured. An insignificant amount of the zinc was trapped in the silicates, making it unnecessary to dissolve the silicates for a good yield. Leaching is a common way of dissolving metals from fly ash. In this project, leaching experiments were performed in a process reactor, and the eluate was analyzed with ICP-OES and IC. The fly ash was first pre-leached with water to remove water-soluble salts. Sulfuric acid and ammonia solution were studied as possible leachates for zinc recovery. Using sulfuric acid resulted in immediate formation of gypsum, making this leachate problematic. The leaching experiments with ammonia showed good results, making ammonia solution a possible leachate for recovery of zinc from fly ash.

• Kristiansen, Håvard; Omtvedt, Jon Petter & Eriksen, Dag Øistein (2015). Radiochemical analysis of cadmium in nitric and phosphoric acid. Universitetet i Oslo. Vis sammendrag

  The goal of this research project was to find a way to produce fertilizer with low concentrations of cadmium from phosphate rock with relatively high cadmium concentrations. A method for the production of a radioactive cadmium tracer was developed and implemented. The tracer was used to investigate how cadmium behaves in a critical step of a process for fertilizer production. A method for measuring the radioactivity from 109Cd was developed, tested and implemented. The 109Cd radiotracer and the detection method were used to investigate solvent extraction from nitric and phosphoric acid, as well as from an industrial fertilizer-production solution. After a screening of a selection of possible commercial extractants, di-(2-ethylhexyl)phosphoric acid (HDEHP) and di-(2,4,4-trimethyl pentyl)dithiophosphinic acid (Cyanex 301) where studied closely. The results were interpreted in order to propose chemical equations for how HDEHP and Cyanex 301 react with cadmium and the acid matrix.

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