Essays about: "Acidic leaching"

Showing result 1 - 5 of 8 essays containing the words Acidic leaching.

1. 1. Trace element leaching from alum shale fines and red ash from Kvarntorp during a large column test

   University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

   Author : Helena Rydfjord; [2022]
   Keywords : Alum shale; Leachate; Trace elements; Kvarntorp;

   Abstract : Fuel shortage during the Second World War led to oil production in Kvarntorp, Kumla during 1942-1966 by pyrolyzing alum shale rich in pyrite, FeS2, and organic material such as kerogen. This production has led to a lot of waste laying deposited out in the open after the mining closed and has had negative environmental impact in the form of ongoing weathering and leaching of acidic water and leaching of trace elements into its surroundings. READ MORE

3. 2. Long-Term Impact of Drought on AcidSulfate Soil Leaching, a Study of NineCatchment Areas in Sweden and Finland

   University essay from Uppsala universitet/Luft-, vatten- och landskapslära

   Author : Emilie Åström; [2022]
   Keywords : acid sulfate soil; hydrological drought; water chemistry; metal leaching; sulfate concentration; sur sulfatjord; hydrologisk torka; vattenkemi; metallurlakning; sulfatkoncentration;

   Abstract : Sediments rich in sulfide were deposited in the Littorina sea in an environment that was shallow, anoxic,and reductive. The sediments were brought above sea level by isostatic uplift and can now be foundalong the coast of the Baltic sea. READ MORE

4. 3. Investigating Brønsted Acidic Deep Eutectic Solvents for Recycling of Lithium Cobalt Oxide

   University essay from Uppsala universitet/Strukturkemi

   Author : Mattias Lindgren; [2022]
   Keywords : Deep eutectic solvents; Recycling; Lithium-Ion Batteries; Cathode Materials; LCO;

   Abstract : Recently, the production of lithium-ion batteries (LIB) has grown rapidly, highlighting the need for efficient and environmentally friendly recycling of LIB waste. In this work, the usage of so-called deep eutectic solvents (DESs) for the leaching of the LIB cathode material lithium cobaltoxide is investigated. READ MORE

5. 4. Increased leaching of metals as a result of foundation work

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Emmy Mattisson; [2018]
   Keywords : Principal components analysis; Modified double mass analysis; Geochemistry; Sulphide bedrock; Remediation methods; Surface water pollution;

   Abstract : Heavy metal contamination in the environment is a global issue that is likely to increase in the future. This report investigates a construction area in which increased concentrations of the heavy metals cadmium, cobalt, copper, nickel and zinc and a decreased pH-value has been observed in the surface water recipient. READ MORE

6. 5. Leaching of Pyrrhotite from Nickel Concentrate

   University essay from Luleå tekniska universitet/Industriell miljö- och processteknik

   Author : Filip Abrahamsson; [2017]
   Keywords : Leaching; Pyrrhotite; Nickel Concentrate; Pentlandite; H2SO4; sulfuric acid; non-oxidative; acid leaching; Lakning; Magnetkis; Nickelkoncentrat; Pentlandit; H2SO4; svavelsyra; icke-oxidativ; syralakning;

   Abstract : Non-oxidative acid leaching of pyrrhotite from Kevitsa’s Ni-concentrate and methods to recover by-products, have been investigated. Selective dissolution of pyrrhotite (Fe1-xS, 0<x<0.25) can enrich the content of the valuable metals, such as Ni and Co, in the final concentrate and will reduce the amount of Fe and S sent to the smelters. READ MORE