Sökning: "Arsenic V"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden Arsenic V.

  1. 1. Solubility of arsenic in untreated and ZVI-treated contaminated aquifer material

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Oscar R. Davies; [2022]
    Nyckelord :Hjältevad; zerovalent iron; phosphate extraction; Oxalate extraction; Visual MINTEQ; geochemical modelling;

    Sammanfattning : Arsenic (As) is a toxic element to all life and exists in nature both naturally and anthropogenically. Naturally As contaminated soils are formed due to high geogenic background As concentrations which is released when bedrock is eroded. Asia is a continent with a high amount of naturally As contaminated soils and groundwater. LÄS MER

  3. 2. Arsenite removal from contaminated water by different sorbent materials

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Kaijie Ding; [2020]
    Nyckelord :Arsenic contamination; adsorption; hydrotalcite; Mg−Al layered double hydroxide; amorphous aluminium hydroxide; amorphous titanium oxide; adsorption isotherm; co-existing anions;

    Sammanfattning : Arsenic (As) contamination is a worldwide problem, and millions of people are suffering from it. There are two major inorganic forms of As in waters: arsenate(V) and arsenite(III), and adsorption to a sorbent material may be an efficient method to handle them. LÄS MER

  4. 3. Passivation of Gallium Arsenide Nanowires for Solar Cells

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Austin Irish; [2019]
    Nyckelord :nanowires; semiconductors; solar cells; photovoltaics; passivation; electronics; chemistry; polymers; hydrazine; plasma; gallium; arsenic; iii-v; epitaxy; photoluminescence; time-resolved; spectroscopy; Physics and Astronomy;

    Sammanfattning : A strategic and diverse set of passivation methods for gallium arsenide nanowires wasstudied. Using a time-resolved photoluminescence setup at100 Kand300 K, the radiativerecombination of charge carriers was resolved on a picosecond time scale. LÄS MER

  5. 4. Electrolysis of chalcopyrite

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Industriell miljö- och processteknik

    Författare :Regina Nemeth; [2018]
    Nyckelord :;

    Sammanfattning : Copper is one of the most important metals globally, due to its wide application range and excellent chemical properties. Today it is commonly produced from chalcopyrite concentrates by the pyrometallurgical route with high emissions of greenhouse gasses. LÄS MER

  7. 5. Arseniks löslighet i grundvattenakviferen i Hjältevad : Utvärdering med geokemisk modellering

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Martina Fastlund; [2018]
    Nyckelord :arsenik; arsenit As[III]; arsenat As[V]; adsorption; ferrihydrit; kd-värden; laktester; mobilisering; oxiderande förhållanden; pH; redoxpotential; reducerande förhållanden;

    Sammanfattning : Excessive concentrations of arsenic in soil- and groundwater constitute a global issue. The spread of arsenic is due to both natural and anthropogenic effects in the environment. Historically, the anthropogenic emissions have originated from several different industrial sectors e.g. LÄS MER