Vol.9 No.3 2017

Research paper : Radioactive cesium decontamination technology for ash (T. Kawamoto et al.)−154−Synthesiology - English edition Vol.9 No.3 (2017) collaborative structure, and whether there was a new collaborative framework different from the above three categories. If possible, could you create a schematic illustration to show how the environment surrounding this R&D (including the stakeholders) changed over time? If this is not possible, could you present a schematic illustration that shows the R&D framework (including the stakeholders) at the nal stage?Answer (Tohru Kawamoto)We decided it was difcult to represent this in a gure, so we added the new subchapter, “3.4 Flow of corporate collaboration and collaboration with the government and local government,” in the manuscript.3 Ways of collaborating with the companiesQuestion & Comment (Naoto Kobayashi)In this paper, “3.1 Transferring strategy” was very well written and it is very important. I think it is useful for researchers who will be involved in the “bridging research” or translational research in the future, including those at universities. However, in reality, industry-academia collaboration often does not work very well. If you know any “secrets” in transferring to companies based on your experience, please tell us.Answer (Tohru Kawamoto)Thank you for your encouraging comments. For the practical utilization based on the technology originated in the research institute, the important points are described below. Please note that the situation would be different in the case where the research demand is raised by companies. Basically, It would be necessary to establish Table 2 as formal knowledge. Specifically, it is as follows:(1) Visualization of the business image is the most important, even if it is just an expectational diagram. In general, the researcher in the research institute thinks that the companies should create their business models. However, if we think so, the project will fail regardless of whether the technology is good or bad when the companies cannot achieve their business model. Of course, the companies are responsible for their nal business models. However, at the start of the R&D, when the companies know no details, construction of the draft of the model by the institute-side would be important for discussion.(2) The design of the supply chain is also important. If the partner company is large, it would cover all of the supply chain on its own. But a small and medium-sized company often cannot do that. When a small and medium-sized company establishes the business model, the research institute needs to suggest some material supplier, for example.(3) Consideration for handling of intellectual properties are also important. At least, when you aim for commercialization involving multiple companies as in this case, AIST is required to keep the basic intellectual property to make the companies follow our vision.Although I focused on topics other than research, specialty of the technology is the most important, as described in Subchapter 3.4.Note that we have not yet reached our research goal, unfortunately. I think we are out of the “valley of death” because the companies succeeded in commercializing the adsorbents and the products has been recommended in the government agency manuals. On the other hand, for true contribution to society, we must overcome the “Darwinian sea”. Currently, we have not achieved industrialization, one of the reason being that the progress of the cesium decontamination by the government has gone slightly differently from our initial plan. Although this is totally the role of the companies, “what the research institution can do in this stage?” is an issue to be considered.4 Storage of the adsorbentsQuestion & Comment (Naoto Kobayashi)In “2.2.4 Investigation of the storage and disposal of the waste material,” you describe the establishment of a mild oxidation method using heated steam. Since this is an extremely important technology in your R&D, it is recommended to show the reference for published papers, if any. If this is the first description, you should provide more explanation including gures about the “large amount of oxidative heat.”Answer (Tohru Kawamoto)It is cited as Reference [51] as a paper on it has been published on March 25, 2016.5 Science of hexacyanoferrateQuestion (Toshimi Shimizu)In the cesium adsorption using hexacyanoferrates, are there any scientific experiments on what kinds of structural factors affect the adsorption performance? For example, do different metals such as iron, cobalt, nickel, copper, zinc, or others, or the different composition of iron/cyanoferrate group/water have great effect on that? In practical application, the adsorbent needs to be used under various and complex aqueous conditions (temperature, coexistence of various ions, presence of other molecular compounds, pH, concentration, etc.). From the perspective of analytical chemistry, are the optimal metal species and compositions for each adsorption under various conditions clear? Or, is it necessary to conduct an adsorption test for each adsorbent on site? Please explain from the scientific view of analytical chemistry.Answer (Tohru Kawamoto)I think the optimal solution at the academic paper level is mostly known, e.g. concerning the capacity of the cesium adsorption or high-pH resistance by changing the metal species. However, there isn’t a lot of work for the detailed dependence on the composition ratio of each metal species. We have determined the chemical composition with intensive investigation such as the elution properties after adsorption. However, Prussian blue has different properties compared to other analogues. Its mechanism of cesium adsorption is not completely understood. This issue will be discussed elsewhere, since this discussion is beyond the scope of this paper.

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