Study on Adsorption Ability of Adsorbents for Strontium in Different Solutions

Abstract

ABSTRACT:The Tsunami due to the Great East Japan Earthquake on March 11, 2011 indirectly caused a nuclear disaster at the Fukushima Daiichi nuclear energy plant of the Tokyo Electric Power Company. The radioactive strontium dispersed by the accident has spread to the soil, lake, river and marine environments. In addition, contaminated groundwater continues to be generated by the flow under the damaged facilities of the plant. The increase of collected tainted water makes it difficult to secure the storage facility. In the face of such situation, the decontamination work for the radioactive strontium has not been completed. It is possible that humans may be exposed as a result of transfer through the food chain and biomagnification when the tainted water, including the major quantity of strontium leak to the marine environment. Therefore, the decontamination of strontium is an urgent requirement. To help address this risk, we previously conducted an experiment to sequester strontium into an adsorbent so as to decrease the degree of contamination. The results of this earlier study confirmed that the uptake ability of adsorbent for strontium varied in different solutions. In this study, the adsorption test of adsorbent is conducted to understand its ability in solution composed of magnesium, potassium or chloride. The hydroxyapatite derived from fish bones is developed and used as the adsorbent. From the result of tests, it is confirmed that the adsorption ability of the hydroxyapatite for divalent cation is high in the various solutions.

Adsorption Properties of Hydroxyapatite Produced From Fish Bones for Fluorine

“…In addition to heavy metals, FbA also has adsorption performance for radioactive materials such as strontium (Sr 2+ ) [27]. In particular, it is confirmed that FbA has the ability to selectively adsorb strontium in solutions containing different chemical species such as sodium chloride and potassium chloride, as well as in pure water [28]. On the other hand, it is reported that the powder hydroxyapatite produced by calcining and pulverizing fish bones (Fishbone Powder: FbP, see Fig.…”

Recycling of Fishery Waste as Planting Base Porous Concrete Aimed at Achieving Carbon Neutrality

“…Against this background, in order to reuse fish bones, which are discarded drastically at fish farms and fisheries processing plants, the hydroxyapatite produced from fish bones was developed by some of the authors, and its use as an adsorbent was proposed. In previous studies, the authors have clarified that the hydroxyapatite produced from fish bones has ability to adsorb for heavy metals such as zinc (Zn 2+ ), cadmium (Cd 2+ ), mercury (Hg 2+ ) and manganese (Mn 2+ ), and radioactive substances such as strontium (Sr 2+ ) in solution [9][10][11]. However, the use of adsorbents alone will not lead to a significant reduction in fishery waste.…”