Distribution and classification of metal species in soil leachates
| Autor: | G.W. Hay, R.K. Micklethwaite, S.J. Duffy, Gary W. vanLoon |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Species distribution Inorganic chemistry Pollution Concentration ratio law.invention Metal chemistry law Environmental chemistry visual_art Dissolved organic carbon visual_art.visual_art_medium Environmental Chemistry Organic matter Leachate Neutron activation analysis Atomic absorption spectroscopy Waste Management and Disposal |
| Zdroj: | Science of The Total Environment. :189-197 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/0048-9697(89)90234-9 |
| Popis: | Using an ion-exchange separation procedure, metals in soil leachates from laboratory columns were separated into a portion consisting of simple cationic inorganic forms, and a second portion containing anionic organically-bound forms. Concentrations of Al, Ca, Co, Cu, Fe, Hg, K, Mg, Mn, and Na in each of the separated fractions were determined by neutron activation analysis and/or atomic absorption spectroscopy. A range of behaviour was observed, from metals that are generally present in inorganic forms (Ca, K, Mg, Na) to those that are usually found in association with soluble organic matter (Al, Fe, Hg). The typical behaviour is consistent with established environmental classifications of elements. For metals that can exist in both inorganic and organic forms, species distribution is influenced by the pH and dissolved organic carbon (DOC) concentration in the water, with high DOC and high pH favouring the formation of organic complexes. The relationship between these factors and the concentration ratio of organic to inorganic forms of metal is discussed. |
| Databáze: | OpenAIRE |
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