In situ and laboratory investigations into contaminant migration

Williams, Geoffrey M.; Higgo, J.J.W.

doi:10.1016/0022-1694(94)90246-1

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Dieser Vorgang ist speziell aus der Umgebung nicht abgedichteter Deponien bekannt, wo die deponiebürtigen Kolloide die anorganischen Sedimentoberflächen mit einem organischen coating überziehen und dadurch die Sorptionskapazität des Aquifers vergrößern (BAUMANN 1994, KRETZSCHMAR et al 1995. Ob und welcher der vorgestellten Mechanismen am konkreten Standort wirksam wird, ist namentlich von der hydrochemischen Beschaffenheit des Aquifers und des Grundwassers und von den angetroffenen Kolloiden abhängig (HIGGO et al 1993, WILLIAMS & HIGGO 1994. Eine detaillierte Untersuchung und Beschreibung der drei Phasen ist deshalb unerläßlich (LIU et al 1995 (STRAUCH et al 1994).…”

Section: Einführungunclassified

Sickerwassertransport von Kolloiden und Schwermetallen in Bergbaufolgelandschaften - Felduntersuchungen und Laborversuche

Baumann¹,

Fruhstorfer²,

Nießner³

1998

Grundwasser

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KurzfassungDer Einfluß von Kolloiden auf das Transportverhalten von Schwermetallen wurde untersucht. Die dreidimensionale Erfassung der hydrochemischen Milieubedingungen zeigte eine klare, zeitlich konstante Schichtung des Sickerwassers innerhalb der Deponie. Mit Hilfe einer REM/EDX-basierten Einzelteilchenanalyse konnten im Größenbereich von 30 nm bis 1 µm überwiegend Salz-und Quarzkolloide im Sickerwasser nachgewiesen werden, darunter dominieren organische Kolloide. Obwohl einige Schwermetalle (Co, Cu) zu großen Teilen mit Kolloiden assoziiert vorlagen, war die Gesamtmasse der kolloidgebundenen Schwermetalle zu vernachlässigen. Aus den Sorptionsversuchen ergaben sich deutliche Wechselwirkungen zwischen Silica-Kolloiden und Schwermetallen. In den Säulenversuchen konnte jedoch keine signifikante Änderung des Transportverhaltens nachgewiesen werden. Etwa 60 % der Kolloide wurden im Versuchszeitraum am Sediment ausgefiltert. Die Untersuchungen belegen, daß anorganische Kolloide am untersuchten Standort keine Rolle für den Schwermetalltransport spielen. Abstract The influence of colloids on the transport of heavy metals at a former lignite mining site investigated. A threedimensional hydrochemical mapping allows a view into the disposal revealing the stratigraphy within the water body.A SEM/EDX based single-particle method for the characterization of aquatic colloids was developed. Within a size range from 30 nm to 1 µm mostly inorganic silica and salt colloids were be detected, whereas the size fraction below 30 nm was predominated by organic colloids. Although some heavy metals, mainly Co and Cu, were associated to colloids, the total amount of heavy metal colloids was neglectable. Silica colloids were chosen for batch and column investigations. Though the sorption coefficients suggested that the colloids should be a sink for heavy metals, no significant changes of the transport behaviour due to the presence of colloids was observed. Instead, the colloids were filtered by the sediment. The results of the field and laboratory work indicate clearly that there is no significant enhancement of heavy metal transport at the Kanena landfill site by inorganic colloids.

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Section: Einführungunclassified

Sickerwassertransport von Kolloiden und Schwermetallen in Bergbaufolgelandschaften - Felduntersuchungen und Laborversuche

Baumann¹,

Fruhstorfer²,

Nießner³

1998

Grundwasser

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“…This process significantly depends on the establishment of microbial populations as a response to the contaminants’ loading. It is indispensable to investigate the actual pollution plumes to gain efficient insights into the complicated framework to foresee the fate of the contaminants [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Attenuation of municipal landfill leachate through land treatment

Pazoki

Abdoli

Karbassi

et al. 2014

J Environ Health Sci Engineer

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The treatment of municipal landfill’s leachate is considered as one of the most significant environmental issues. In this study a laboratory experiment was conducted through land treatment, achieving an efficient and economical method by using Vetiver plant. Moreover, the effects of land treatment of leachate of municipal landfills on the natural reduction of organic and inorganic contaminants in the leachate after the pre-treatment in the Aradkouh disposal center are invested. Three pilots including the under-investigation region’s soil planted by Vetiver plant, the region’s intact soil pilot and the artificial composition of the region’s soil including the natural region’s soil, sand, and rock stone are used. The leachate, having passed its initial treatment, passed through the soil and to the pilot. It was collected in the end of the pilots and its organic and inorganic contaminants were measured. However, the land treatment of leachate was conducted in a slow rate at various speeds. According to the results, in order to remove COD, BOD5, TDS, TSS, TOC the best result was obtained in the region’s soil planted with Vetiver plant and at the speed of 0.2 ml per minute which resulted 99.1%, 99.7%, 52.4%, 98.8%, 94.9% removal efficiencies, respectively. It also can be concluded that the higher the organic rate load is, the lower the efficiency of the removal would be. In addition, EC & pH were measured and the best result was obtained in the region’s soil planted with Vetiver plant and at the speed of 0.2 ml/min.

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