Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan; Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, Tomata, Okayama 708-0698, Japan.
Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
J Hazard Mater. 2018 Oct 5;359:307-315. doi: 10.1016/j.jhazmat.2018.07.044. Epub 2018 Jul 17.
Strontium (Sr) removal from seawater has recently attracted attention from an environmental perspective after the Fukushima Nuclear Power Plant accident, but there is a lack of effective removal techniques for removing Sr from seawater. In the present study, we looked at the removal efficiency of Sr by using barite (BaSO) under various experimental conditions to develop techniques for the direct removal of Sr from seawater. The effects of pH, saturation state, ionic strength, competitive ions, and [Ba]/[SO] ratio in the initial aqueous solution were examined. Among them, Sr uptake by barite was found to be dependent on pH, saturation state, and [Ba]/[SO] ratio in initial aqueous solution, showing that most of the aqueous Sr can be removed from the aqueous solution by adjusting these parameters. However, the effects of ionic strength and competitive ions were negligible, suggesting the effectiveness of its application to removal of Sr from seawater. Batch experiments were also conducted in a seawater system, and a rather high removal efficiency of Sr from seawater (more than 90%) was achieved. Considering its high removal and retention efficiency of Sr in seawater systems, barite is a reliable material for the removal of Sr from seawater.
锶（Sr）在福岛核事故后，从环境角度出发受到了人们的关注，但其在海水中的去除技术仍缺乏有效性。本研究通过在各种实验条件下使用重晶石（BaSO）来研究 Sr 的去除效率，旨在开发直接从海水中去除 Sr 的技术。考察了 pH 值、饱和度、离子强度、竞争离子和初始水溶液中[Ba]/[SO]比等因素对 Sr 去除效率的影响。结果表明， Sr 在重晶石上的吸附受初始水溶液 pH 值、饱和度和[Ba]/[SO]比的影响，表明通过调整这些参数可以将大部分水溶液中的 Sr 去除。然而，离子强度和竞争离子的影响可以忽略不计，这表明其在海水去除 Sr 方面的应用具有有效性。在海水体系中进行的批量实验也表明， Sr 从海水中的去除效率相当高（超过 90%）。鉴于其在海水体系中对 Sr 具有较高的去除和保留效率，重晶石是一种可靠的去除海水 Sr 的材料。
