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Sorption of trace quantities of cadmium by soils with different chemical and mineralogical composition
Cadmium sorption experiments were performed using four soil separates of different chemical and mineralogical composition, adding Cd solutions with initial concentrations ranging from 15 to 150 μgExpand
Trace metals in Valencia lake (Venezuela) sediments
An exploratory study of the trace metals Cd, Cu, Mn, Ni, Pb, and Zn in sediments of lake Valencia (Venezuela), South America, 10° 10′N, 68°68′W, gave the following results: (A) Total amounts of Cu,Expand
I investigated the level, chemical fractions, and solubility of Pb in several roadside soils of heavily traveled areas of Caracas, Venezuela. Using 1 N HNO3 extraction, I studied the levels of leadExpand
Influence of Ionic Strength and Inorganic Complex Formation on the Sorption of Trace Amounts of Cd by Montmorillonite
Cadmium sorption by montmorillonite from solutions in the 15 to 120 ppb range was studied in the presence of increasing concentrations of NaClCO/sub 4/, NaCl, and Na/sub 2/SO/sub 4/ solutions. TheExpand
Surface loading effect on Cd and Zn sorption by kaolinite and montmorillonite from low concentration solutions
Studies of Cd and Zn sorption using Na-saturated kaolinite and montmorillonite, and low metal solution concentrations similar to those found in the environment, showed that metal sorption affinityExpand
Lead and zinc levels and chemical fractionation in road-side soils of Caracas, Venezuela
Twenty five soil samples located nearby highways and streets of Caracas, Venezuela were collected and chemical, physical and mineralogical analysis were done to characterize them. The soils haveExpand
Influence of Exchangeable Cation on the Sorption of Trace Amounts of Cadmium by Montmorillonite
The effect of different exchangeable cations on the sorption of trace amounts of Cd by montmorillonite (clay fraction, Upton, Wyoming) was studied by equilibrating samples of homoionic clayExpand
Sorption and desorption of Zn on Ca-Kaolinite
Experiments on Zn2+ sorption-desorption by Ca-kaolinite using a wide range of Zn2+ concentrations and two acid pH values allowed us to reach the following conclusions: (1) For Zn2+ surface coveragesExpand
Soil chemical properties under individual evergreen and deciduous trees in a protected Venezuelan savanna
On a etudie les proprietes chimiques du sol sous les trois especes d'arbres sempervirents les plus repandues (Curatella americana, Byrsonima crassifolia, Bowdichia virgilioides) dans une savane a Calabozo au Venezuela. Expand