Essays about: "heavy minerals"

Showing result 16 - 20 of 20 essays containing the words heavy minerals.

  1. 16. Water purification capacity of natural mixed clays from Malawi

    University essay from SLU/Dept. of Soil and Environment

    Author : Anna Hernell; [2009]
    Keywords : chromium III ; lead II ; zinc II ; copper II ; cadmium II ; adsorption; surface complex; natural clays; water treatment;

    Abstract : Lack of fresh and clean drinking water is a problematic issue for many people worldwide. The water quality in some streams in Malawi, situated in south east Africa, has recently been investigated. The study shows that the concentration of several heavy metals exceeds the guideline values in drinking water set by WHO. READ MORE

  3. 17. Comparison of Mineral- and Protein Content between Conventional, Organic and Biodynamic Swedish Winter Wheat with Atomic Absorption Spectrophotometry and Elemental Combustion Analysis.

    University essay from Naturvetenskapliga institutionen

    Author : Elise Palm; [2009]
    Keywords : biodynamic organic wheat flour mineral protein conventional atomic absorption spectrophotometry Saltå Kvarn;

    Abstract :   Correlation between production method and mineral-, cadmium- and protein content were sought for Swedish winter wheat. The wheat was grown according to conventional, organic or biodynamic principles. The minerals; iron, zinc, magnesium, copper and the heavy metal cadmium were analyzed with atomic absorption spectroscopy. READ MORE

  4. 18. Physico-chemical characteristics of some soils from Mali and their potential in heavy metal removal

    University essay from SLU/Dept. of Soil and Environment

    Author : Märit Sällström; [2008]
    Keywords : heavy metals; adsorption; natural clays;

    Abstract : Rivers, streams and groundwater contaminated by heavy metals is a growing concern world wide as the pressure on existing water resources is increasing. Unfortunately, low income countries are afflicted the most. There is a need for cost efficient and simple methods and techniques to solve the problem. READ MORE

  5. 19. Landvinning : scenarier för efterbehandling och gestaltning av Aitikgruvan, Gällivare

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Simon Fogelqvist; [2008]
    Keywords : gruvor; gruvverksamhet; återställa; återvinna; efterbehandla; landskap; gestaltning;

    Abstract : Open pit mining creates huge amounts of tailings and waste rock deposits. Due to it's content of sulphide minerals, predominantly pyrite (FeS2), there is a risk of oxidation and formation of acid water containing heavy metals, known as Acid Rock Drainage (ARD). To prevent the process of oxidation, the tailings and waste rock have to be reclaimed. READ MORE

  6. 20. Simulation of Selenium Remobolisation and cycling in sediment

    University essay from KTH/Industriell ekologi

    Author : Erik Palm; [1997]
    Keywords : Modelling; selenium; biogeochemistry; bioturbation; sediment; pollutant fate; Lake Macquarie;

    Abstract : Lake Macquarie is the largest estuarine lake in New South Wales and is located on the eastern seaboard of Australia, approximately 85 km north of Sydney.The study of heavy metal concentrations in surficial sediments, sediment cores, seagrasses and fish conducted by the New South Wales Department of Mines in 1974 revealed that significant heavy metal contamination of Lake Macquarie has occurred. READ MORE