Essays about: "heavy metal contamination"

Showing result 16 - 20 of 22 essays containing the words heavy metal contamination.

  1. 16. How does urban discharge affect a lake in a recreational area in central Sweden? : a comparison of metals in the sediments of three similar lakes

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Madelene Holmblad; [2014]
    Keywords : Geografi; naturgeografi och ekosystemanalys; tungmetaller; smältvatten; sediment; Geography; physical geography and ecosystem science; heavy metals; melt water; sediments; Earth and Environmental Sciences;

    Abstract : Metal contamination of lakes can bring negative effects to aquatic biota, and to the general health of the ecosystem. Urban discharge is a known source of common metals. In cold regions, snow disposal sites further enhances the risk of contaminating recipient lakes, due to accumulation of pollutants. READ MORE

  3. 17. Anthropogenic Influence on the Water Quality in the lake Poopó Area, Bolivia

    University essay from Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Author : Sara Eklund; Johan Lundström; [2013]
    Keywords : Mining; Water quality; Heavy metals; Ions; Superficial waters; Antequera; Pazña; Urmiri; Poopó; Technology and Engineering;

    Abstract : Problem Definition: For several hundreds of years, mining in Bolivia has been an important part of the economy. The mining activity has a negative effect on both the environment and the health of the people. Previous studies conducted in the Lake Poopó area show elevated concentrations of heavy metals and ions harmful to people and nature. READ MORE

  4. 18. Experimental zinc stress on benthic diatoms assemblage growth in Fyrisån water

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Navid Naghavian; [2012]
    Keywords : Benthic diatoms; heavy metal contamination; valve malformation; heavy metals; DOC; TOC; water assessment;

    Abstract : Benthic diatoms are unicellular, brown algae with siliceous cell walls. They are often used to show water quality in river sand lakes. Benthic diatoms can show elevated nutrient levels, very acid conditions, pollution by organic matter and probably also pollution by heavy metals, which makes them useful biological indicator species. READ MORE

  5. 19. A Risk Assessment of Reusing Wastewater on Agricultural Soils - A Case Study on Heavy Metal Contamination of Peach Trees in Ouardanine, Tunisia

    University essay from Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Author : Kristina Berglund; Helena Claesson; [2010]
    Keywords : heavy metals; Health risk assessment; Ouardanine Monastir; Tunisia; peaches; Earth and Environmental Sciences; Technology and Engineering;

    Abstract : This thesis is a risk assessment of the risk related to ingestion of heavy metals via peaches irrigated with treated wastewater. The studied heavy metals were Cadmium (Cd), Lead (Pb), Zinc (Zn) and Cupper (Cu). The thesis is founded on a case study performed on a peach field in Ouardanine, Tunisia. READ MORE

  6. 20. Traffic-Related Metals in Soil and Sediment in Mauritius

    University essay from Institutionen för geovetenskaper

    Author : Liselott Petersson; [2005]
    Keywords : Copper; lead; zinc; traffic pollution; heavy metal contamination; background concentrations metals; Mauritius;

    Abstract : Trafik utgör en stor föroreningskälla av tungmetaller i vägnära jordar och särskilt är det koppar (Cu), bly (Pb) och zink (Zn) som associeras med fordonstrafik. I ett historiskt perspektiv härrör blyutsläpp främst från bränsleförbränning, medan kopparemissioner (i första hand från slitage av bromsbelägg) och zinkutsläpp (från däck) från trafik står för så mycket som hälften av det urbana utsläppet av koppar och zink till omgivningen. READ MORE