Description: Das Projekt "Release of hexavalent chromium from ore processing residues and the potential of biochar for chromium immobilization in polluted soils" wird vom Umweltbundesamt gefördert und von Universität Köln, Fachgruppe Geowissenschaften, Geographisches Institut durchgeführt. Chromium (Cr) is introduced into the environment by several anthropogenic activities. A striking ex-ample is the area around Kanpur in the Indian state of Uttar Pradesh, where large amounts of Cr-containing wastes have been recently illegally deposited. Hexavalent Cr, a highly toxic and mobile contaminant, is present in significant amounts in these wastes, severely affecting the quality of sur-roundings soils, sediments, and ground waters. The first major goal of this study is to clarify the solid phase speciation of Cr in these wastes and to examine its leaching behavior. X-ray diffraction and synchrotron-based X-ray absorption spectroscopy techniques will be employed for quantitative solid phase speciation of Cr. Its leaching behavior will be studied in column experiments performed at un-saturated moisture conditions with flow interruptions simulating monsoon rain events. Combined with geochemical modeling, the results will allow the evaluation of the leaching potential and release kinetics of Cr from the waste materials. The second major goal is to investigate the spatial distribution, speciation, and solubility of Cr in the rooting zone of chromate-contaminated soils surrounding the landfills, and to study the suitability of biochar as novel soil amendment for mitigating the deleterious effects of chromate pollution. Detailed field samplings and laboratory soil incubation studies will be carried out with two agricultural soils and biochar from the Kanpur region.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Rochen ? Köln ? Chromat ? Monsun ? Chrom ? Resorption ? Biokoks ? Geochemie ? Skigebiet ? Wind ? Röntgenspektroskopie ? Material ? Pflanzenkohle ? Löslichkeit ? Ackerboden ? Absorption ? Bodenverunreinigung ? Deponie ? Feststoff ? Gesetzesnovellierung ? Grundwasserzustand ? Rhizosphäre ? Schmutzstoff ? Spektralanalyse ? Wirkung ? Ackerrandstreifen ? Regen ? Abfall ? Bewässerung ? Bewertung ? Regen ? Ackerland ? Studie ? Technik ? Toxizität ? Tropengebiet ? Erzverhüttung ? Sediment ? Grundwasser ? Wasser ? Boden ? Auslaugung ? Bodenschadstoff ? Modellierung ? Wirkung ? Landwirtschaft ? Rückstand ? Anthropogener Einfluss ? Erdoberfläche ? Umwelt ? Feuchtigkeit ? Gebiet ? Verunreinigung ? Staat ? Forschungseinrichtung ? EXPERIMENT ? UMLAND ? BETRAG ? "Bodenwissenschaften ? GEMISCHT ? " ? Fluss [Bewegung] ? DEMOBILISIERUNG ? ERGEBNIS ? GEGENWART ? Chemische Wertigkeit ? LAENDER ? NEU ? POTENZIAL ? RAEUMLICHE VERTEILUNG ? VERHAELTNIS ? SAEULE ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2013-01-01 - 2024-11-29
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