Atun Gulten, Kilislioglu Ayben
Engineering Faculty, Chemistry Department, University of Istanbul, 34850, Avcilar, Istanbul, Turkey.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2002 Aug;37(7):1295-305. doi: 10.1081/ese-120005987.
This study was undertaken to investigate the interaction between uranium contaminated seawater and the sand in contact with this seawater. Adsorption data have been evaluated from column experiments of seawater from Marmara, Black Sea and Mediterranean contaminated with 10(-7)M uranium. The uranium uptake on the fractionated and non-fractionated sand of these sea have been measured as a function of time. The adsorption proceeds via a rather fast stage followed by a slower one. Results could be correlated with particle size and porosity of the sand. Adsorption isotherms are also derived from amount of adsorbed uranium vs. time plots and the results have been analyzed by the Langmuir, Freundlich and Dubinin-Radushckevich (D R) isotherm equations over the entire range of uranium concentrations. By fitting the data to D-R isotherm, we have calculated the adsorption energy and decided to type of the adsorption.
本研究旨在调查受铀污染的海水与接触该海水的沙子之间的相互作用。通过对马尔马拉海、黑海和地中海受10(-7)M铀污染的海水进行柱实验，评估了吸附数据。测量了这些海水中分级和未分级沙子对铀的吸收随时间的变化情况。吸附过程先经历一个较快阶段，随后是一个较慢阶段。结果与沙子的粒径和孔隙率相关。吸附等温线也从吸附铀量与时间的关系图中得出，并在整个铀浓度范围内用朗缪尔、弗伦德利希和杜比宁-拉杜舍维奇（D-R）等温线方程对结果进行了分析。通过将数据拟合到D-R等温线，我们计算了吸附能并确定了吸附类型。
