Essays about: "natural clays"

Found 5 essays containing the words natural clays.

  1. 1. Geochemical and palaeomagnetic characteristics of a Swedish Holocene sediment sequence from Lake Storsjön, Jämtland

    University essay from Lunds universitet/Geologiska institutionen

    Author : Joakim Robygd; [2015]
    Keywords : Jämtland; geochemistry; palaeomagnetism; PSV; sedimentation rate; Holocene development; geochronology; climate change; Earth and Environmental Sciences;

    Abstract : As a part of a French-Swedish collaboration project to reconstruct middle to northern European climate variations during the Holocene, a sediment sequence from Lake Storsjön, Jämtland was retrieved and analysed for geochemical and palaeomagnetic properties. The subsampled sequence, composed of one freeze core and three Niederreiter piston cores, revealed information of both climatic, environmental and anthropogenic changes over the past 10,800 years. READ MORE

  3. 2. Removal of chromium in wastewater with natural clays in southern Malawi

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Lina Danielsson; Lisa Söderberg; [2013]
    Keywords : Chromium; reduction; adsorption; wastewater; bauxite;

    Abstract : To live a healthy life, people all around the world need access to safe water. A lot of industries,together with the fast growing population in Blantyre, a city in southern Malawi, pose a threat to theaccess of safe water for the citizens. Several of the industries in Blantyre release contaminated waterto the nearby streams. READ MORE

  4. 3. Sediment variations in the Kuchi Lake, southern Taiwan: : Climate signal or tectonics?

    University essay from Institutionen för geologiska vetenskaper

    Author : Oscar Fransner; [2011]
    Keywords : Taiwan; Kuchi Lake; climate archive; sediment core; XRF;

    Abstract : Climate archives are of greatest significance when it comes to paleoclimate studies, since these types of archives in a natural way have registered and preserved the conditions of the past. There are several types of climate archives, one of the most commonly used are lake sediments, because lakes can reveal different types of information, for example weathering, vegetation and precipitation. READ MORE

  5. 4. 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

  6. 5. 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