Radiochemical Investigation of the Behaviour of Lead in Groundwaters

Lieser, Κ. H.; Ament, A.

doi:10.1524/ract.1993.60.1.27

Cited by 6 publications

(7 citation statements)

References 6 publications

(9 reference statements)

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“…The results of the investigation of the behaviour of Pb in natural groundwaters by use of 210 Pb have been reported in a previous communication [1]. In this paper the partition of Pb in groundwater/sediment systems, in particular the sorption of Pb and the influence of various parameters, the method of equilibration, the time of equilibration, the volume to mass ratio Vjm, the initial concentration of Pb and the pH are described.…”

Section: Introductionmentioning

confidence: 75%

“…humic and fulvic acids [1]. Therefore it can be concluded that these complexes are sorbed on the fine and coarse particles.…”

Section: System Gl/slmentioning

confidence: 96%

“…Similar chemisorption reactions are taking place with = AlOH or with =FeOH groups at the surface of solid particles. Organic complexes of Pb that are formed with organic compounds carrying -COOH and -OH groups, like humic or fulvic acids [1], will preferably be bound by physical adsorption. Unfortunately, because of the low concentrations of Pb, the chemical species of Pb that are sorbed on the surface of the suspended particles and the sediments can not be identified, and at higher concentrations of Pb the prevalent chemical species of this element will be different.…”

Section: Comparison Of the Rs Values In Tables 3 And 4 Shows That Equmentioning

confidence: 99%

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Radiochemical Investigation of the Partition and Sorption of Lead in Groundwater/Sediment Systems

Lieser

Ament

1993

Radiochimica Acta

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Lead / 210 Pb / Sorption / Sediments / Suspended particles / Colloids SummaryIn three different groundwater/sediment systems the partition of 210 Pb on the molecular fraction, the fine (colloid) particles and the coarse particles suspended in the groundwaters and the sorption ratios without filtration, after 0.45 μπι filtration and after ultrafiltration were determined as function of time. The methods of equilibration (smooth equilibration and equilibration by shaking), the volume to mass ratio V/m of groundwater and sediment, the concentration of Pb and the pH were varied.In general, relatively high sorption ratios are found after separation of groundwaters and sediments by filtration or ultrafiltration. The changes in the partition of Pb on the molecular fraction, the fine (colloid) and the coarse particles suspended in the groundwaters and the spectrum of sorption ratios obtained are discussed on the basis of the properties of the groundwaters and their components and the influences of the various parameters (method of equilibration, method of separation of groundwater and sediment, time, Vjm ratio, concentration of Pb, pH). As already observed for other elements, the sorption ratios are increasing strongly with the V/m ratio, indicating the influence of suspended fine (colloid) particles carrying Pb.

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Section: Introductionmentioning

confidence: 75%

“…humic and fulvic acids [1]. Therefore it can be concluded that these complexes are sorbed on the fine and coarse particles.…”

Section: System Gl/slmentioning

confidence: 96%

Section: Comparison Of the Rs Values In Tables 3 And 4 Shows That Equmentioning

confidence: 99%

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Radiochemical Investigation of the Partition and Sorption of Lead in Groundwater/Sediment Systems

Lieser

Ament

1993

Radiochimica Acta

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“…free ions, complexes, intrinsic colloids ("Eigenkolloide"), carrier colloids ("Fremdkolloide") and speciation of radionuclides has become an important branch of radiochemistry [3,57,[77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95],…”

Section: General Aspectsmentioning

confidence: 99%

Radionuclides in the Geosphere: Sources, Mobility, Reactions in Natural Waters and Interactions with Solids

Lieser

1995

Radiochimca Acta

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The various sources of radioactivity are considered. Natural and anthropogenic radionuclides are selected with regard to their importance in the geosphere and listed according to their chemical properties. The importance of the solubility of the radionuclides is emphasized and in view of their mobility five compartments are distinguished: surface of the earth, atmosphere, near-surface layers (with connection to the surface), nuclear installations and deep layers without connection to the surface.In a following chapter, the reactions of radionuclides with the components of natural waters are discussed. The importance of the knowledge of the chemical forms (speciation) is stressed and illustrated by examples. The influences of Eh and pH, inorganic salts, colloids, suspended matter, organic compounds and microorganisms as well as that of precipitation and coprecipitation is brought out. Then, the interaction of radionuclides with solid components of the geosphere are dealt with. After description of general aspects, interactions with consolidated rocks, unconsolidated rocks, various minerals, sediments and soils are discussed. Isotopic and non-isotopic exhange reactions of radionuclides on minerals are also considered. Finally, the problems of modelling are discussed.

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“…[11]). This simple methodology, however, poses a number of methodological problems [12][13][14] and cannot be expected to give reliable results [3,15]. The diffusion technique [16] offers an attractive alternative because it allows to study sorption processes under experimental conditions held close to those in the environment.…”

Section: Introductionmentioning

confidence: 99%

Diffusion and diffusion-convection experiments for studying the sorption of radionuclides in soils

1999

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Diffusion experiments have been established as a convenient laboratory technique for studying sorption of radionuclides in soils. The through-diffusion technique was modified to allow for a constant pressure gradient over the soil pellet during the experiment. The design enables to choose various values of the Peclet number which reflect the relative contributions of convective and diffusive transport. For these experimental conditions, analytical solutions of the convection-dispersion equation are presented assuming a linear equilibrium sorption isotherm. Data are presented for diffusion and for diffusion-convection experiments of cesium using a parabrown earth.

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Radiochemical Investigation of the Behaviour of Lead in Groundwaters

Cited by 6 publications

References 6 publications

Radiochemical Investigation of the Partition and Sorption of Lead in Groundwater/Sediment Systems

Radiochemical Investigation of the Partition and Sorption of Lead in Groundwater/Sediment Systems

Radionuclides in the Geosphere: Sources, Mobility, Reactions in Natural Waters and Interactions with Solids

Diffusion and diffusion-convection experiments for studying the sorption of radionuclides in soils

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