Development of Simultaneous Recovery System of Rare Metals from Deep Ocean Water

深海水稀有金属同步回收系统的研制

基本信息

批准号：
18560724
负责人：
YOSHIZUKA Kazuharu
金额：
$ 2.5万
依托单位：
The University of Kitakyushu
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560724/
关键词：
Ocean resources Rare metal Adsorptive separation Deep ocean water 反応・分離工学

项目摘要

For the purpose of efficient and selective separation and recovery of rare metals such as lithium, strontium, rubidium and cesium from deep ocean water, we have carried out : (1) Development of novel adsorbents having high selectivity of strontium, rubidium and cesium lithium against coexisting ions such as sodium, magnesium, (2) Evaluation of adsorption and separation performance of the adsorbents, (3) Development of granulation method suitable for the adsorbents preventing large pressure drop in the adsorption column, and (4) Investigation of simultaneous recovery system of rare metals from the seawater using the column module. As results of this research, the followings were obtained and these results were already published in several journals and international conferences.(1) We have successfully developed zeolite A adsorbent which high-selectively recognizes strontium and cesium ions. We have also investigated the relationship between adsorption properties and selectivity and crystal structures of the adsorbents.(2) We have elucidated that the adsorption of target ions was preceded under the ion exchange mechanism.(3) We have prepared the granular adsorbents with some millimeter order using with several kinds of binders such as chitin, alumina and silica binders. We have elucidates the optimal binder and amount ratio between adsorbent and binder. We have also developed a novel granulation method using extruder.(4) We have examined the influence of some experimental conditions on the selective recovery of rare metals in artificial deep ocean water in detail. We have investigated the durability of the granulated adsorbents under the adsorption-desorption operation of the column module system.

为了从海洋深层水中高效、选择性地分离回收锂、锶、铷、铯等稀有金属，我们开展了：（1）开发对锶、铷、铯、锂等具有高选择性的新型吸附剂。钠、镁等共存离子，(2)吸附剂的吸附和分离性能评价，(3)开发适用于防止大压降的吸附剂的造粒方法(4)利用塔模块从海水中同时回收稀有金属系统的研究。作为这项研究的成果，获得了以下成果，这些成果已发表在多个期刊和国际会议上。(1)我们成功开发了高选择性识别锶和铯离子的沸石A吸附剂。我们还研究了吸附剂的吸附性能、选择性和晶体结构之间的关系。(2)我们阐明了目标离子的吸附是在离子交换机制下进行的。(3)我们制备了一些毫米级的颗粒吸附剂。可与甲壳素、氧化铝、二氧化硅等多种粘结剂配合使用。我们已经阐明了最佳的粘合剂以及吸附剂和粘合剂之间的用量比。我们还开发了一种使用挤出机的新型造粒方法。(4)我们详细研究了一些实验条件对人工深海水中稀有金属选择性回收的影响。我们研究了颗粒吸附剂在塔模块系统吸附-解吸操作下的耐久性。