Strontium adsorption and penetration in kaolinite at low Sr2+concentration
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چکیده
منابع مشابه
Chromate Adsorption by Kaolinite
Chromate (CrO4 2-) adsorption was investigated on kaolinite (0.2-2 ~m) saturated with NaC104 over a range of pH. Adsorption increased with decreasing pH because of protonation of chromate and/ or variable charge sites on kaolinite. Chemical pretreatment to remove noncrystalline and crystalline oxide contaminants affected the magnitude ofCrO42adsorption, but not the pH range over which CrO42adso...
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Adsorption of quinoline (pKa 5 4.92) and background electrolyte (CaCl2) onto specimen kaolinite and montmorillonite were measured as a function of pH (3–7.5) and ionic strength (1–10 mM), and as a function of quinoline concentration (0.2–1.55 mM) at fixed pH values of maximum adsorption. Maximum sorption of quinoline occurred at pH 3.5–4.0 for kaolinite, and pH 3.0–5.0 for montmorillonite. At t...
متن کاملMechanism of Sulfate Adsorption by Kaolinite
-Sulfate adsorption on kaolinite was followed at 0.7 ~teq/ml to 99/~eq/ml solution concentrations at 30"C and at pH 6.0, and the amount of OHions released and the change in surface charge were determined. Sulfate was adsorbed at positive and neutral sites by displacing O H 2 and OHgroups, respectively. Adsorption of sulfate occurred predominantly at positive sites at low (0.7/~eq/ml to 0.9/~eq/...
متن کاملEquilibrium Theory of the Kaolinite-water System at Low Moisture Contents, with Some Remarks concerning Adsorption Hysteresis
A MICROSCOPIC theory of the kaol ini te-water system is presented, based upon the assumption t ha t the clay-water interaction may be envisioned as par t ly hydrat ion of the exchangeable cations and par t ly adsorption by the oxygen and hydroxyl surfaces. The theory t reats exchangeable cation hydrat ion quantum-mechanically as an ion-dipole phenomenon and considers water adsorption by the min...
متن کاملAdsorption characterizations of fulvic acid fractions onto kaolinite.
Fulvic acids extracted from a typical rice-production region near Taihu Lake of China were fractionated into three fractions including F4.8, F7.0 and F11.0 (eluted by pH 4.8 buffer, pH 7.0 buffer and pH 11.0 buffer, respectively). Sorption of fulvic acid (FA) fractions onto kaolinite was studied by batch adsorption experiments, and characterizations of kaolinite before and after adsorption were...
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ژورنال
عنوان ژورنال: Soil Science and Plant Nutrition
سال: 2017
ISSN: 0038-0768,1747-0765
DOI: 10.1080/00380768.2016.1277435