Essays about: "fiber bank"

Found 5 essays containing the words fiber bank.

  1. 1. 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

  3. 2. Theoretical design of an XRF system for environmental measurements of Mercury in fiber banks

    University essay from Mittuniversitetet/Institutionen för elektronikkonstruktion

    Author : Runpeng Yu; [2020]
    Keywords : XRF detection system; MCNP modelling; Mercury; Fiber bank;

    Abstract : This thesis demonstrates the advantages of using the Energy-dispersive X-ray fluorescence (ED-XRF) system to quantify the mercury content in fiber banks at first. The Monte Carlo N-Particle (MCNP) code was then used to simulate the XRF system model with suitable parameters such as the input X-ray energy level, the detector material, and the environmental factor (water depth). READ MORE

  4. 3. Optimization and development of the welding system for fiber-optic duct joints

    University essay from Mittuniversitetet/Institutionen för elektronikkonstruktion

    Author : Jiatong Duan; [2019]
    Keywords : Electrofusion welding; Fiber-optic duct; Current Measurement; dsPIC33FJ16GS404; Capacitor bank;

    Abstract : At present, the fiber optic ducts are connected by a mechanical type of joint. In this method, two ducts cut in the right angle are pushed in from both sides of the joint, and takes approximately one second to joint ducts together. READ MORE

  5. 4. Abundance and diversity of small mammals in Swedish beaver systems

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

    Author : Felicitas Glabischnig; [2015]
    Keywords : small mammals; beaver; Castor fiber; habitat heterogeneity; ecosystem engineer; biodiversity; bank vole; Myodes glareolus; wetlands;

    Abstract : Through their ecosystem engineering activities, beavers (Castor fiber ) create ponds and riparian zones littered with deadwood, providing hetero- geneous micro-habitats for a variety of small mammal species. In this study small mammals were snap-trapped in nine beaver systems and four reference wetland systems that were not created by beavers in southern and central Sweden to compare abundance and diversity of voles, shrews and mice. READ MORE

  6. 5. Spreading of persistent organic pollutants from fiber bank sediments

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

    Author : Lisa Vogel; [2015]
    Keywords : persistent organic pollutants; PCB; DDT; HCB; fiber bank; paper and pulp; POM; log Kd; bioaccumulation; pore water concentration; Marenzelleria spp.; Saduria entomon;

    Abstract : Discharge of untreated wastewater from paper and pulp industries have led to large environmental impacts on the coastal sediments in Västernorrland, Sweden. Dissolved fibers caused the formation of large fiber banks and fiber influenced sediment areas, which proved to be highly affected by contamination with persistent organic pollutants (POPs). READ MORE