Impacts of inorganic ions and temperature on lead adsorption onto variable charge soils
The effect of inorganic ions and temperature on lead (Pb2+) adsorption was evaluated on 3 acidic soils : yellow-brown soil (YBS), latosol soil (LS), and lateritic red soil (LRS). The results showed that : the adsorption of Pb2+ was greater
in the presence of SO42− than other ions; The increase of K+ and Ca2+ concentrations reduced the adsorption of Pb2+; Pb2+ adsorption was more pronounced in the yellow brown soil than in other soils. Pb2+ adsorption on soils was more favorable at 5–25 °C than at 35
Adsorption of chromium (VI) ions on Brazilian smectite : effect of contact time, pH, concentration, and calorimetric investigation
Adsorption ; Amazonie ; Argile minéral ; Brésil ; Chrome ; Géochimie ; Lutte contre la pollution ; Pollution ; Pollution de l'eau
of toxic metal, which are commonly present in waters from a variety of sources and industrial effluents. For this purpose, the adsorption isotherms of Cr(VI) from aqueous medium at room temperature were explored, bearing in mind the influence of different
Adsorption characteristics of modified sand for the removal of hexavalent chromium ions from aqueous solutions : Kinetic, thermodynamic and equilibrium studies
Adsorption ; Chrome ; Cours d'eau ; Expérimentation ; Géochimie ; Inde ; Jharkhand ; Propriétés du sol ; Sable ; Subernarekha ; Thermodynamique
dissolution et leur précipitation peuvent être décrites par des modèles de thermodynamique chimique. L'A. souligne le rôle de l'adsorption et de la désorption à l'interface atmosphère-sol dans le délai de transport des substances polluantes. Spécificités de la
Thanks to its strong adsorption on clay minerals horizontal redistribution of fallout 137 Cs can be related to soil movement. The technique was tested in a study on the effectivity of semi-natural benches in erosion retardation and colluviation
The present paper is aimed at the defining of the buffering capacities with respect to potentially toxic chemicals. On the basis of a paradigmatic description of soil moisture balance and related fluxes of chemicals a review of adsorption
increase with increase of pH, chlorides and sodium in both monsoon and dry seasons. The concentration and the behaviour of the trace elements are controlled by adsorption, supplemented by organic reactions and by precipitation in sulphide-rich environments.
Ultrasonic monitoring of moisture adsorption and desorption of a quartz micaschist produced results contrary to expectations. Upon water uptake rather than an ultrasonic velocity increase due to the introduction of a better propagating medium
The changes in saturated hydraulic conductivity, macroscopic swelling and clay dispersivity of a sodic black clay soil in relation to solution concentration and Na adsorption ratio of the percolating solution were measured. Based on the threshold
Etude des sels dans les sols sableux du sud du désert occidental d'Egypte. La composition des sels est liée à la profondeur du sol et à la température et est aussi influencée par l'adsorption du sodium. Discussion des résultats en fonction des
Etude de la capacité d'adsorption des principaux types de dépôts quaternaires fluvioglaciaires sur le territoire du massif montagneux de Khibiny en rapport avec le strontium et détermination de la migration du strontium dans l'eau du sol.
teneur en sels des solutions interstitielles des roches argileuses et de leurs propriétés d'échange et d'adsorption, la répartition et l'accumulation d'éléments hyoertoxiques (en particulier dioxines et minéraux lourds) dans les roches et l'eau.
Sedigraph analysis, nitrogen adsorption method and mercury porosimeter test. The fine grained material from weathered granite has specific surface area values of for greater than those corresponding from silty till and clayey vein. The results
at the last interval of the previous rainfall event. This effect was caused by alterations to the soil surface that occurred during the rainless periods. Furthermore, the results show that the herbicide loss relates to herbicide adsorption to organic carbon
des mécanismes applicables aux réactions entre les métaux et la matière organique (adsorption, échanges ioniques et formation de complexes) les métaux sont classés selon leur différente mobilité.
Adsorption ; Cadmium ; Désorption ; Estuaire Gironde ; Europe ; Europe Ouest ; France ; Gironde ; Golfe de Gascogne ; Hydrochimie ; Matière dissoute ; Matière en suspension ; Matière particulaire ; Milieu estuaire ; Modèle ; Océan Atlantique ; Océan
Atlantic Ocean ; Bay of Biscay ; Europe ; France ; Gironde Estuary ; Gironde France ; North Atlantic ; Northeast Atlantic ; Western Europe ; adsorption ; cadmium ; desorption ; dissolved materials ; estuarine environment ; estuarine sedimentation