Mihaljevic Martin, Ettler Vojtech, Sisr Ludek, Sebek Ondrej, Strnad Ladislav, Vonásková Vera
Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43, Prague 2, Czech Republic.
Bull Environ Contam Toxicol. 2009 Sep;83(3):422-7. doi: 10.1007/s00128-009-9706-8. Epub 2009 Mar 17.
The effect of low concentrations of phosphate ions on the extraction of arsenic (As) was tested on naturally contaminated soil (As 126 mg/kg) using batch experiments. Interaction entails the extraction of low concentrations of As (5.4-23.3 microg/L As). There are statistical differences in the contents of As, Ca, Cu, Ni, Pb and nitrate in the composition of the extracts. Three types of kinetic curves document that dissolution and precipitation reactions, adsorption, desorption and biological processes participate in determining the composition of the extracts. The elevated As contents in the phosphate extracts are probably caused by competition between phosphate and arsenate ions for soil adsorption sites.
采用批量实验，在天然污染土壤（砷含量为126毫克/千克）上测试了低浓度磷酸根离子对砷（As）萃取的影响。相互作用涉及低浓度砷（5.4 - 23.3微克/升砷）的萃取。提取物成分中砷、钙、铜、镍、铅和硝酸盐的含量存在统计学差异。三种动力学曲线表明，溶解和沉淀反应、吸附、解吸以及生物过程都参与了提取物成分的决定。磷酸盐提取物中砷含量升高可能是由于磷酸根离子和砷酸根离子竞争土壤吸附位点所致。
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