Determination of Solute Organic Concentration in Contaminated Soils Using a Chemical-equilibrium Soil Column System

2007 ◽  
Vol 183 (1-4) ◽  
pp. 377-389 ◽  
Author(s):  
Jesper Gamst ◽  
Peter Kjeldsen ◽  
Thomas H. Christensen
2000 ◽  
Vol 42 (1-2) ◽  
pp. 325-330 ◽  
Author(s):  
H. Rubin ◽  
U. Zoller ◽  
D. Dveyrin

This study represents a possible approach for the determination of the parameters characterizing the efficiency of surfactant mix for the remediation of soil and aquifers contaminated by entrapped non aqueous phase liquid (NAPL). The method incorporates the performance of two sets of experiments and their appropriate analysis. In one set, called the “vessel experiments”, the CMC of the surfactant mix is determined. The second set of experiments is called the “flow experiments”. In this set of experiments soil columns are contaminated by entrapped NAPL. Water flows through these columns with various types of surfactant mix solutions. According to the soil permeabilityvariation and the dissolved NAPL concentration in the water leaving the soil column, the effect of the surfactant mix on the coefficient of mass transfer is determined.


2003 ◽  
Vol 67 (2) ◽  
pp. 219-231 ◽  
Author(s):  
H. W. Langmi ◽  
J. Watt

Computer-controlled scanning electron microscopy (CCSEM) has been assessed for the determination of form and size distribution of heavy metals in urban contaminated soils. Metal distributions within individual particles were determined using X-ray element mapping. The sites selected for study were (1) around a landfill site, previously a colliery in Wolverhampton, UK and (2) a private garden adjacent to a railway in Nottingham, UK. Backscattered thresholding techniques were used to isolate the Pb-containing categories. The classification results for both Wolverhampton and Nottingham soils were generally similar but more Pb-containing classes were observed for the Nottingham samples when a comparison was made between results of the same size fractions. However, difficulties with the technique arose when particles showing chemically similar weathering crusts were assigned to the same class, despite having different internal compositions. The CCSEM data therefore need to be interpreted with caution and their application limited to situations in which particle internal complexity is not an issue.


Author(s):  
FRANK BRESCIA ◽  
JOHN ARENTS ◽  
HERBERT MEISLICH ◽  
AMOS TURK

2007 ◽  
Vol 1 (3) ◽  
pp. 105-115
Author(s):  
Edmond Gatimu . ◽  
Mwinyikione Mwinyihija . ◽  
Ken Killham .
Keyword(s):  

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