Effects of CaCl₂ on concentration and speciation of soil Cd around a Pb-Zn mine

Abstract Remediation of Cd contaminated soil around mines is still the current academic focus. In order to discuss activation and extraction effects CaCl 2 on concentration speciation a Pb-Zn mine, field investigation sample collection were conducted. Batch experiment was used study influence time extraction. contents analysed. And species extracted by sequential procedures. Results show that there are obvious effect for . The best choice 0.1 mol/L. 4h. also percentage content exchangeable lowest with value 9.1% 0.16 mg/kg when 10.5% 0.18 It found transformation such as exchangeable, carbonates bound Fe-Mn oxides should be main reasons effect. mine complex coupling process dissolution, ion exchange, desorption, acidolysis, oxidation-reduction complexation, etc. All these above will aid provide basis research, development application remediation technology this other mines.