Experiments columns

Van der Meer JR, TNP Bosma, WP de Bruin, H Harms, C Holliger, HHM Rijnaarts, ME Tros, G Schraa, AJB Zehnder (1992) Versatility of soil column experiments to study biodegradation of halogenated compounds under environmental conditions. Biodegradation 3 265-284. 

Artinger R, Kienzler B, Schii(31er W, et al. 1998. Effects of humic substances on the 241 Am migration in a sandy aquifer Column experiments with Gorleben groundwater/sediment systems. J Contain Hydrol 35 261-275. 

Geomicrobiology Journal, 14, 41-49. http //www.dep.state.pa.us/deD/deputate/minre s/bamr/amd/science of amd.htm Tsukamoto T.K., Killion, H.A., Miller, G.C. 2004. Column experiments for microbiological treatment of acid mine drainage low-temperature, low-pH and matrix investigations, Water Research, 38, 1405-1418. 

Laboratory batch and column experiments were used to identify and quantify... 

Measured concentrations of As(lll) and As(V) in leachate from a column experiment are compared with simulated concentrations using the model PHAST in Figure 1. Arsenic concentrations in leachate were below detection for the first 50 pore volumes of contaminated groundwater eluted through the column. Although initial As(lll) concentrations were 650 ptg/L, oxidation of As(lll) to As(V) by manganese oxides resulted in leachate concentrations of As(lll) near detection limits for 270 pore volumes. All of the As... 

Fig. 1. Measured and modeled concentration of As(lll) and As(V) in leachate from column experiment. Initial As(lll) concentration = 650 pg/L initial As(V) concentration = 250 pg/L. (Note As(lll) modeled concentrations were <1 pg/L and plot along bottom of x-axis.)...

Figure 2. Column experiments, arsenate concentrations in the outlet of the columns...

Typical results for the shorter-time column experiments show Rb uptake plotted against the square root of time at several temperatures in Figure 2. No measurable decreases in Li, K or Ba were observed for column experiments conducted at 25°C. 

Figure 2. Rate of Rb uptake by obsidian from recirculating column experiments at different temperatures. Straight lines are least square regressions to Equation 1.

Fig. 10 a, b. Column experiments using different flow rates, first order model TOC concentration released vs a time b pore volume... 

Bouwer and McCarty [374] suggested 1,1,2-TCA is an intermediate of TeCA transformation in continuous-flow column experiments and TCE as an intermediate in a batch experiment under methanogenic conditions. Those transformations are reductive dechlorination and dehydro chlorination, respectively. 

Fig. 8.15 Typical trends of dissolved Cu ( ), Pb ( ), and Zn (A) concentrations and pH (-) in effluent solutions collected during a flow column experiment on soil samples from the Bogue site (U.S.A.), as a function of the throughput volume of acidified, 0.01 M CaCl solution. (Bang and Hesterberg 2004)...

Fig. 8.44 Adsorption and desorption of Cr(VI) by a telluride alluvium in (a) a flow-through column experiment and (b) on alluvium under batch conditions (Stollenwerk and Grove 1985)...

Nucleophilic cleavage, acid catalyzed hydrolysis, and oxidation of aldicarb in dilute solution were achieved in batch and/or column experiments using macroporous reactive ion exchange resins. As in solution, nucleophilic cleavage proceeds faster than acid catalyzed hydrolysis. The basis for pursuing study of the latter mechanism is discussed. 

We will now use an example column experiment to determine the retardation coefficient for a given soil. 

As part of a forensic investigation of a continuous Malathion spill, you need to determine the retardation coefficient of the soil at the site for Malathion. You have decided to do so in a column experiment with the soil (illustrated in Figure E6.11.1). Also given in the figure are the results of a pulse test with the nonsorptive tracer, chloride, and the results of a pulse test with Malathion. What is the retardation coefficient, R1... 

The mobility of humic/fulvic colloid-borne tri-, tetra-, penta- and hexavalent actinide ions has been clearly observed in sand column experiments (Kim et al. 1994 Artinger et al. 

Kim, J. 1., Delakowitz, B., Zeh, P., Klotz, D. Lazik, D. 1994. A column experiment for the study of colloidal radionuclide migration in Gorleben aquifer systems. Radiochimica Acta, 66/67, 165-171. 

Schuessler, W., Artinger, R., Kim, J. I., Bryan, N. D. Griffin, D. 2001. Numerical modeling the humic colloid borne Americium (III) migration in column experiments using the transport/speciatrion code KID and the KICAM model. Journal of Contaminant Hydrology, 47, 311-322. 

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