Sökning: "humic acid"

Visar resultat 1 - 5 av 20 avhandlingar innehållade orden humic acid.

  1. 1. Surface reactivity, stability, and mobility of metal nanoparticles in aqueous solutions : Influence of natural organic matter and implications on particle dispersion preparation

    Författare :Sulena Pradhan; Inger Odnevall Wallinder; Jonas Hedberg; Eva Blomberg; Emma Strömberg; Kerstin Forsberg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanoparticles; freshwater; di-hydroxybenzoic acid; humic acid; copper; aluminium; manganese; dissolution; agglomeration; stability; complexation; Kemi; Chemistry;

    Sammanfattning : The growing development of nanotechnology has resulted in an increased use of nanoparticles (NPs) in various applications ranging from medicine, military, to daily consumer products. There is a concern that NPs can be dispersed into the environment in various ways, for example to air and water during manufacture, use, incineration or recycling of products and thus pose a risk to health and the environment. LÄS MER

  3. 2. The acid-base properties and aggregation of humic materials

    Författare :Anette Bergelin; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 3. Studies on the formation of complex oxidation and condensation products of phenols : a contribution to the investigation of the origin and nature of humic acid

    Författare :Holger G.H. Erdtman; Stockholms högskola; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 4. Baltic Sea sediments : Source and sink for metal contamination

    Författare :Sina Shahabi-Ghahfarokhi; João Marcelo Ketzer; Alessandro Amorosi; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Baltic Sea; sediments; acid sulfate soil; metal; remediation; reoxygenation; X-ray absorption spectroscopy; Environmental Chemistry; Miljökemi; Miljövetenskap; Environmental Science;

    Sammanfattning : The Baltic Sea sediments record spatial and temporal information about metalsand metalloids (hereafter referred to as metals), which could help to understandthe past and present contamination sinks in different basins. In addition, giventhe expanding anoxic zones in the Baltic Sea, the response of metals to artificialreoxygenation is poorly understood. LÄS MER

  7. 5. Physico-chemical properties of some aquatic fulvic acids - functional groups and stability

    Författare :Irina Valarié; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : Humic material constitutes a category of naturally produced organicmacrocompounds, widely spread in both terrestrial and aquatic systems and accounting for up to 70% of the total soil carbon and 50% of the dissolved organic carbon in surface waters. Humic material is formed as the result of complex chemical transformations of biomass. LÄS MER