Sökning: "Gunnar Jacks"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Gunnar Jacks.

  1. 1. The influence by point sources on carbon, nitrogen and metals in two sedimentary environments

    Författare :Hanna Bohlin; Nils Holm; Carl-Magnus Mörth; Gunnar Jacks; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap;

    Sammanfattning : Sediments in two aquatic environments have been investigated. Both are anthropogenically affected and polluted. The focus has been on stable carbon and nitrogen isotopes, C/N ratios, and heavy metals. The first site is Höggarnsfjärden Bay in the inner parts of the Stockholm Archipelago, Sweden, where a garbage dump releases treated leach water. LÄS MER

  3. 2. On the chemical state and mobility of lead and other trace elements at the biogeosphere/technosphere interface

    Författare :Mattias Bäckström; Gunnar Jacks; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lead; trace elements; traffic; shooting range; peat; sediments; speciation; biokemi; Chemistry; Kemi; Kemi; Chemistry;

    Sammanfattning : Most inorganic contamination has occurred at the interface between the technosphere and the biogeosphere, even though atmospheric emissions have affected the entire globe. Several human activities now pose a substantial threat towards human health and the ecosystems. LÄS MER

  4. 3. Biofilms and microbial barriers in drinking water treatment and distribution

    Författare :Jonas Långmark; Gunnar Jacks; Jean Claude Block; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Microbiology; Mikrobiologi; Microbiology; Mikrobiologi;

    Sammanfattning : The primary objective of conventional drinking water treatment and distribution is to deliver to the consumer water that is both aesthetically pleasing and does not constitute a human health risk. To achieve this, water utilities employ a range of physical (i.e. sand and membrane filtration) and chemical (i. LÄS MER

  5. 4. Water Supply in Tanzania and Performance of Local Plant Materials in Purification of Turbid Water

    Författare :Nancy Marobhe; Gunno Renman; Gunnar Jacks; Msafiri Jackson; Tapio Katko; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antibacterial effect; Coagulant proteins; Vigna unguiculata; Parkinsonia aculeata; Ion exchange; Tanzania water supply; Water engineering; Vattenteknik;

    Sammanfattning : Water supply services in urban and rural areas of Tanzania were reviewed and specific studies were carried out on water supply and on purification of turbid water sources using locally available plant materials in rural villages of Singida Rural District. The review showed that large proportions of urban and rural populations in Tanzania face acute water supply problems mainly due to poor planning, implementation and management of water supply projects, including an inability to address social, technical, operation and maintenance and financial issues. LÄS MER

  7. 5. ARSENIC REMOVAL BY PHYTOFILTRATION AND SILICON TREATMENT : A POTENTIAL SOLUTION FOR LOWERING ARSENIC CONCENTRATIONS IN FOOD CROPS

    Författare :Arifin Sandhi; Gunnar Jacks; Gunno Renman; Maria Greger; Roger Herbert; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; aquatic moss; grain; rice; lettuce; macrophyte; phytoremediation; speciation; temperature; oxygenation; wetland.; Land and Water Resources Engineering; Mark- och vattenteknik;

    Sammanfattning : Use of arsenic-rich groundwater for crop irrigation can increase the arsenic (As) content in food crops and act as a carcinogen, compromising human health. Using aquatic plant based phytofiltration is a potential eco-technique for removing arsenic from water. LÄS MER