Essays about: "mine leachate"

Showing result 6 - 9 of 9 essays containing the words mine leachate.

  1. 6. Denitrification in a Low Temperature Bioreactor System : Laboratory column studies

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Albin Nordström; [2014]
    Keywords : Denitrification; Low Temperature; temperature; residence time; column studies; Denitrifying bioreactor; bioreactor; woodchips; nitrate reduction; nitrate treatment; nitrite; ammonium; Kiruna; mine leachate; denitrification reaction kinetics; concentration profiles; Denitrifikation; denitrifierande bioreactor; låg temperatur; temperatur; uppehållstid; ammonium; nitrit; nitratprofiler; Kiruna; kolonnstudier; bioreaktor;

    Abstract : Denitrification is a microbially-catalyzed reaction which reduces nitrate to N2 through a series of intermediate nitrogen compounds. Nitrate is a nutrient and its release into the environment may lead to eutrophication, depending on the amount that is released and the state of the recipient. READ MORE

  3. 7. Nitrogen transformations at the Kiruna mine : The use of stable nitrogen isotopes to trace nitrogen-transforming processes

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

    Author : Lino Nilsson; [2013]
    Keywords : Nitrogen; Nitrogen processes; Isotopes; Isotope tracers; Stable isotopes; Mines; Isotope analysis; Dual isotope analysis; Kväve; Kväveprocesser; Isotoper; Spårningsisotoper; Spårningsmetod; Gruvor; Isotopanalys;

    Abstract : Release of different nitrogen compounds can cause eutrophication in lakes and rivers whichcan lead to oxygen-free environments in bottom water and in the sediment and can in turnlead to fish-deaths. Ammonium can be toxic to biota and nitrate can in high concentrationeven be toxic to humans. READ MORE

  4. 8. Mapping leachates and subsurface structures using different geophysical methods.

    University essay from KTH/Mark- och vattenteknik

    Author : David Barkels; Johan Åberg; [2012]
    Keywords : geophysics; tailings; acid mine leachate; pollution mapping; CVES; GPR; slingram;

    Abstract : The enrichment of ore produces large amounts of sulfur and metal-rich residual waste called tailings, which need to be deposited and stored for a long time. When the tailing is oxidized, large amounts of protons and metals are dissolved and diffuse to the groundwater. READ MORE

  5. 9. Modelling reactive transport of acid mine drainage in groundwater : Effect of geochemical processes spatially variable flow source location and distribution

    University essay from KTH/Industriell ekologi

    Author : Tegenne Tekelu Geberetsadike; [2004]
    Keywords : Acid Mine Drainage AMD ; reactive transport; geochemical processes; flow variability; pH buffering; metal attenuation; groundwater; modelling; LaSAR-PHREEQC;

    Abstract : Impacts from mining waste deposits on groundwater resources have been recognized invarious parts of the world; though varied in scale depending on the composition of mineralsbeing mined, the level of technology employed and environmental commitment of thedevelopers. Mining activities usually involve milling, concentrating, and processing of oreswhich will result in a huge amount of waste, called tailings, usually deposited inimpoundments as a slurry, composed of fine grained geological material (uneconomicalminerals), chemicals utilized in the processs, and water. READ MORE