Essays about: "sediment toxicity"

Showing result 1 - 5 of 14 essays containing the words sediment toxicity.

  1. 1. ASSESSING MICROBIAL COMMUNITY RESPONSES IN A CHEMICALLY STRESSED FRESHWATER ECOSYSTEM USING ENVIRONMENTAL DNA

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Author : Nicolai Laufer; [2023-06-21]
    Keywords : ;

    Abstract : Microbial communities represent the fundamental cornerstones of riverine ecosystems because they are involved in numerous processes which mediate ecosystem services. However, riverine ecosystems are currently massively altered by a variety of anthropogenic activities which includes changes in landuse and chemical pollution. READ MORE

  3. 2. Methods for measuring mercury in gas ebullition from fiber banks : A literature study

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Diana Jonsson; [2021]
    Keywords : Fiber bank; fiber rich-sediment; mercury; contaminants; gas ebullition; pulp-fiber; wood industry; paper industry; environmental toxicity; wood waste;

    Abstract : Mercury contamination is an environmental issue with high priority due to its high toxicity. In addition to the atmospheric deposition, several lakes and rivers in Sweden are contaminated as a result from wood and pulp-fiber industries which stretches back 200 years. READ MORE

  4. 3. Sediment chemistry and the potential toxicity to benthic invertebrates in sediments affected by acid sulfate soils : A study on freshwater and marine sediments in Västerbotten, Sweden

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

    Author : June Johansson; [2020]
    Keywords : Toxicity; Benthic invertebrates; Acid sulfate soils; Sediment chemistry;

    Abstract : The leakages of metals from acid sulfate soils and their potential toxicity to benthic invertebrates were studied in the sediment profiles of Lillkvasjön and Lövselefjärden - a lake and an estuary known to be affected by acid sulfate soils - in Västerbotten, northern Sweden. The concentrations of 25 different elements were analyzed throughout both sediment profiles through X-Ray Fluorescence (XRF) Spectrometer analysis. READ MORE

  5. 4. Distribution and mobilization of heavy metals at an acid mine drainage-affected region, South China

    University essay from Linköpings universitet/Tema Miljöförändring

    Author : Chen Luo; [2020]
    Keywords : acid mine drainage; arsenic; cadmium; geochemical modeling; heavy metals; lead; principal component analysis;

    Abstract : Dabaoshan Mine Site (DMS) is the biggest polymetallic mine in South China. The Hengshi River receives acid mine drain (AMD) waste leaching from the tailings pond and run-off from the treatment plant which flows into the Wengjiang River, Beijiang River, before discharging into the Pearl River. READ MORE

  6. 5. Spatial distribution of persistent organic pollutants (POPs) in sediments contaminated by fiber material from pulp and paper industries

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Gabriel Dupaul; [2018]
    Keywords : PCB; DDT; HCB; fiberbank; fiber-rich sediment; sediment; Sweden; Västernorrland; Ångermanälven; Gulf of Bothnia; Baltic sea;

    Abstract : Sweden has had a long history of forestry activities together with pulp and paper operations. Historical discharges of organic-rich wastewater from pulp and paper factories have resulted in formation of large fiberbanks on the seafloor, which lately have been found to be contaminated with persistent organic pollutants (POPs). READ MORE