Essays about: "mercury"

Showing result 21 - 25 of 124 essays containing the word mercury.

1. 21. The Effects of Depth and Hydrological Connectivity on Heavy Metal Loading in Riparian Zones

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Emily Rose Williams; [2021]
   Keywords : Riparian zones; metal elements in soils; Discrete Riparian Inflow Zones DRIPs ; riparian soils; metal retention;

   Abstract : The area between a stream and land is known as a riparian zone. These zones are highly dynamic whichcarry and accumulate heavy metals and environmental contaminants. Discrete Riparian Input Zones(DRIPs) are a subset of such zones that carry concentrated amounts of water into streams at discrete points. READ MORE

3. 22. Textural characterization of gold in the Björkdal gold deposit, northern Sweden.

   University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

   Author : Fredrik Westberg; [2021]
   Keywords : Björkdal gold deposit; gold; gold-telluride; SEM; mineral association; grain size; geometallurgy;

   Abstract : The Björkdal gold deposit is located in the eastern part of the Skellefte district, northern Sweden. Twenty thin sections from four production areas in the open pit and four drifts from the underground mine were analysed for mineral association and grain size distribution of gold. READ MORE

4. 23. HgII uptake in Geobacter sulfurreducens spheroplasts : Thiols’ role in Hg partitioning and methylation

   University essay from Umeå universitet/Kemiska institutionen

   Author : Andreas Eriksson; [2021]
   Keywords : ;

   Abstract : Mercury (Hg) is a naturally occurring trace element and pollutant that is ubiquitous in aquatic ecosystems. All Hg species are hazardous, but methylmercury (MeHg) is the most alarming due to its neurotoxicity, teratogenicity, and bioaccumulation in the food web. READ MORE

5. 24. Short wavelength UV–LED photoinitiated radical polymerization of acrylate–based coating systems—A comparison with conventional UV curing.

   University essay from Uppsala universitet/Strukturkemi

   Author : Olof Torfgård; [2021]
   Keywords : UV; LED; UVC; UVB; UVA; paint; acrylate; curing; Sherwin–Williams; ATR-FTIR; spectroradiometer; photoinitiator; the mercury arc lamp;

   Abstract : The present work was performed at Sherwin–Williams Sweden group AB with the objective of comparing short-wavelength light emitting diodes (UVB/UVC) with the conventional mercury arc lamp as a curing method of acrylate-based, UV-paint undergoing free-radical polymerization when exposed to UV-radiation. Due to environmental and health risks, mercury-doped radiation sources will be phased out in the near future, according to the United Nations Minamata convention, hence new alternatives are needed. READ MORE

6. 25. Mercury and methyl mercury release in soil and water - their relationship with different properties in Skogaryd

   University essay from Göteborgs universitet/Institutionen för geovetenskaper

   Author : Linnéa Johansson; [2020-07-08]
   Keywords : mercury; methylmercury; demethylation; pH; dissolved oxygen and total organic content;

   Abstract : In Skogaryd research site, water samples were taken and analysed for total mercury (Hgtot) and methylmercury (MeHg) concentration along with the pH, dissolved oxygen (DO) and total organic content (TOC). This to give the condition of the site before the forest is clear-cute and a part of the land rewetted to a wetland. READ MORE