Essays about: "Removal of heavy metals"

Showing result 1 - 5 of 30 essays containing the words Removal of heavy metals.

  1. 1. Change in uptake and transfer of zinc in the food chain when predatory fish disappear from the system

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sara Westerström; [2023]
    Keywords : Aquatic food web; Food chain structure; Trophic transfer; Decline of top predators; Stage-structured biomass model; Pollutants; Heavy metals; Zinc; Akvatisk födoväv; Födovävsstruktur; Trofisk överföring; Minskning av toppredatorer; Stegstrukturerad biomassamodell; Föroreningar; Tungmetaller; Zink;

    Abstract : There is a widespread distribution of possibly toxic heavy metals, such as zinc, in aquatic ecosystems. Simultaneously aquatic food webs are changing due to declining predatory fish stocks. READ MORE

  3. 2. Evaluation of pollutant removal performance of stormwater biofilters in a Swedish climate : Comparison of three different filter media designs

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Anna Träff; [2022]
    Keywords : Stormwater biofilter; stormwater treatment; cold climate; filter media design; low impact development;

    Abstract : In the recent century, a process of urbanization has increased globally. Previously rural or natural land have been converted into impervious surfaces to make way for housing, industries, and roads. This anthropogenic process has resulted in an increased amount of surface runoff from precipitation, so-called stormwater. READ MORE

  4. 3. Reducing cadmium emissions to water during removal of electrostatic precipitator ash : Investigating the effect of process parameters on the formation and precipitation of insoluble cadmium salts in water solutions

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Lukas Esperi; [2022]
    Keywords : cadmium; electrostatic precipitator ash; heavy metals; hydroxide precipitation; recovery boiler; elfilteraska; hydroxidfällning; kadmium; sodapanna; tungmetaller;

    Abstract : The removal of electrostatic precipitator (ESP) ash by solving the ash in water constitutes an environmental problem if heavy metals, such as cadmium, present in the ash remain in the outgoing effluent streams. The ESP ash solution is alkaline, meaning cadmium is present as the insoluble salt Cd(OH)2, cadmium hydroxide. READ MORE

  5. 4. Considerations and Novel Technologies in Industrial Water Treatment - Treatment of challenging wastewater

    University essay from KTH/Kemiteknik

    Author : Nils Toll; [2021]
    Keywords : Industrial water treatment; considerations; novel technologies; BOD; COD; organic waste; heavy metals; desalination; Industriell vattenrening; nyckelfaktorer; nya teknologier; organiskt avfall; tungmetaller; avsaltning;

    Abstract : Industriell vattenrening är ett extremt viktigt område inom Miljöskyddsteknik då 60% av allt sötvatten inom Sverige används av industrier. Substanser som PFAS, aromatiska textilfärger, fenol och läkemedelsrester är extra utmanande då dessa kan vara gifta för biologisk rening. READ MORE

  6. 5. The prospects of using acoustic particle separation techniques to separate heavy metals from lake- and seabed sediments

    University essay from KTH/Marcus Wallenberg Laboratoriet MWL

    Author : Ohan Lundblad; [2021]
    Keywords : acoustic particle separation; ultrasound; acoustics; particle separation; akustisk partikelseparation; ultraljud; akustik; partikelseparation; akustisk partikelseparationsteknik; akustisk separationsteknik;

    Abstract : This work aims to investigate if it is realistic to use acoustic particle separation techniques for separating heavy-metals from pump-dredged seabed sediments on a large scale. A premise for the project has been that the material should undergo hydrothermal carbonization (HTC) before acoustic treatment. READ MORE