Selenium (Se), being an essential nutrient and a toxin, enters the food chain mainly via plants. Selenium isotope signatures were proved to be an excellent redox tracer, making it a promising tool for the exploration of the Se cycle in plants. The analytical method is sensitive on organic samples and requires particular preparation methods, which were developed and validated in this study. Plant cultivation setups revealed the applicability of these methods to trace plant internal processes.
Umfang: XXV, 223 S.
Preis: €46.00 | £42.00 | $81.00Buchdetails
The aim of this study was to describe and quantify Se transfer at the interface between soil and plant. For this purpose, three Se reservoirs were defined: soil, soil solution and plant, represented by kaolinite or goethite, nutrient solution and rice. First, Se transfer from solution to plant and Se partitioning in the plant was studied; then adsorption-desorption processes of Se onto kaolinite and goethite were investigated. Finally, a mass balance of the combined experiment was modelled.
Umfang: XXV, 244 S.
Preis: €37.00 | £34.00 | $65.00Buchdetails
Diese Studie hat ein vollständiges Verfahren für die Messung der Sauerstoff-Isotope in Arsen-Oxianionen in natürlichen Wässern durch den Einsatz verschiedener Adsorbentien entwickelt. Experimente zum kinetischen Austausch von Sauerstoff zwischen AsO43- und Wasser haben gezeigt, dass sich das Gleichgewicht bei verschiedenen pH-Bedingungen und Temperaturen in sehr kurzer Zeit einstellt.
This study has developed a complete procedure for the measurement of oxygen isotopes in arsenic oxyanions in natural waters by using different adsorbents. The experimental results of kinetic exchange of oxygen between AsO43- and water show that the entire exchange procedure happens in a very short time at different pH conditions and temperatures.
Umfang: XXXVI, 191 S.
Preis: €42.00 | £39.00 | $74.00Buchdetails
This publication presents results of an interdisciplinary field study assessing the contribution of biological and inorganic processes in the mobilisation and accumulation of arsenic in groundwater of the Bengal Delta Plain, West Bengal. Investigations were focussed on the distribution of arsenic in sediments and shallow groundwater of two representative study sites. All results were combined in an effort to develop a conceptional model describing the mobility of arsenic in West Bengal aquifers.
Umfang: XX, 295 S.
Preis: €49.00 | £45.00 | $86.00Buchdetails
The scope of this work is to develop a comprehensive understanding of the aerosol pollution in the megacity Beijing. The focus lies on the interaction of anthropogenic and geogenic aerosol particles, their spatio-temporal variation, the most important pollution sources as well as the impact of particulate aerosols on human health and the environment. Furthermore, the bioavailable fraction of metal concentrations and the effect of mitigation measures during the 2008 Olympic Games were evaluated.
Umfang: XIII, 263 S.
Preis: €43.00 | £40.00 | $76.00Buchdetails
The spatial variability of dissolved arsenic (As) concentrations in aquifers was studied near Ha Noi, Vietnam. The goal was to identify major geochemical, sedimentological and hydrochemical differences between high and low As regions. Also, the behaviour of As and other elements during sequential extractions was characterized with micro synchrotron XRF analysis. Based on the results a conceptual model was developed which could explain the current situation on site and in other affected areas.
Umfang: XIII, 230 S.
Preis: €34.90 | £32.00 | $62.00Buchdetails
In this study, samples were selected with respect to their layer charge and morphology. Sixteen bulk materials were pre-selected, which contained either swellable clay minerals or non-swelling clay minerals. One topic of this work was a comprehensive determination of layer and edge charge and exchange properties of clay minerals. A further topic in this study concerned the modification of swellable and non-swelling clay minerals with mineral acids, e.g., HCl and H2SO4.
Umfang: VIII, 258 S.
Preis: €26.50 | £25.00 | $47.00Buchdetails
Die vorliegende Arbeit untersucht die Möglichkeit der Rekonstruktion prähistorischer Hochwasserereignisse am Oberrhein und an der Oberen Donau anhand von Änderungen in der geochemisch-mineralogischen sowie der granulometrischen Zusammensetzung von Auensedimenten. Das konkrete Ziel der Arbeit ist es, einen Zusammenhang zwischen der geochemisch-mineralogischen sowie der granulometrischen Zusammensetzung der im Auenbereich abgelagerten Sedimente und der Höhe des herrschenden Abflusses nachzuweisen.
Umfang: VIII, 247 S.
Preis: €32.50 | £30.00 | $57.00Buchdetails
Agronomic efficiency and management of environmental P inputs can be improved by understanding soil-phosphorus interaction. Iron oxides and other clay minerals, P forms, and P sorption in young alluvial and weathered residual soils were determined. Phosphorus retention related to crystallinity and phase distribution of iron oxides. CBD and oxalate extractable iron and aluminum and smectite and kaolinite explained 90% variation while soil CaCO3 role was only insignificant in explaining P sorption.
Umfang: XIII, 144 S.
Preis: €31.50 | £29.00 | $56.00Buchdetails
Dissolved and suspended particulate matter (SPM) bound Cu, Zn, Ni, As, Pb, Mn, and Fe are common pollutants in surface and groundwater of the Akaki Sub-Basin.
This work (1) presents results of water quality analysis and (2) evaluates an innovative approach for removing heavy metals from polluted water using natural materials.
Removal capacities of the filter media for Cu, Zn, Ni, and Pb reach 90%. The main removal mechanisms involved are weak sorption and surface precipitation.
Umfang: XXI, 225 S.
Preis: €42.50 | £39.00 | $75.00Buchdetails