Essays about: "chromium III"

Showing result 1 - 5 of 6 essays containing the words chromium III.

  1. 1. Chromia-Alumina Thin Films from Alkoxide Precursors : From Precursor Synthesis to Deposition and Characterisation

    University essay from Uppsala universitet/Oorganisk kemi

    Author : Elina Elvelo; [2023]
    Keywords : alkoxide; synthesis; thin film; coating; alumina; chromia; spinodal decomposition;

    Abstract : A hetero-bimetallic alkoxide CrAl3(OiPr)12 was synthesised through metathesis of achromium(III)chloride THF complex (CrCl3 . 3 THF) and 3 KAl(OiPr)4.It was used as a single sourceprecursor to make oxide powders and films with 1:3 chromium/aluminium compositionthrough sol-gel synthesis. READ MORE

  3. 2. Analysis and characterization of environmental friendly trivalent chromium passivation of aluminum alloys

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Emma Västerlund; Ronja Flink; [2016]
    Keywords : aluminium alloys; trivalent chromium passivation; SurTec 650V; goniometry; XPS; AES; SEM; TEM; corrosion;

    Abstract : As of 21st September 2017, industrial use of hexavalent chromium (Cr(VI)) will, due to its environmental toxicity and carcinogenicity, be restricted by REACH regulations. Saab Aeronautics is therefore shifting anticorrosion surface treatment of aluminum alloys from hexavalent chromium conversion to trivalent chromium (Cr(III)) passivation. READ MORE

  4. 3. Characterisation and removal of heavy metals in tannery effluents through the use of local materials

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

    Author : Jonas Robertsson; Camilla Andersson; [2014]
    Keywords : Moringa Oleifera; chromium; tannery; wastewater treatment; natural material; Moringa Oleifera; krom; garveri; avloppsvattenrening; naturligt material;

    Abstract : Chromium and other heavy metals are known to cause issues related to human and environmental health when they occur in high concentrations in ecosystems. Chromium poses a particularly large threat if it occurs in its hexavalent form, Cr(VI), as it is highly reactive and carcinogenic. READ MORE

  5. 4. 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

  6. 5. Textile dyeing in Mali : possibilities for small scale effluent treatment

    University essay from SLU/Dept. of Soil and Environment

    Author : Hanna Larsson; [2009]
    Keywords : water treatment; textile dyes; artisanal; Mali;

    Abstract : Water treatment is an important issue in Mali, an arid country where the Niger River is the mainrecipient for a large part of the effluents from industrial and small scale activities. Clothes dyed withsynthetic dyestuffs are an important part of the culture in Mali. READ MORE