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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.

为了从深海中高效、选择性地分离和回收锂、锶、铷和铯等稀有金属，我们开展了：(1)开发锶、铷、铯锂对钠、镁等共存离子具有高选择性的新型吸附剂；(2)对吸附剂的吸附和分离性能进行评价；(3)开发适合吸附剂的造粒方法，防止吸附塔压降过大；(4)利用柱模块对海水中稀有金属的同时回收系统进行研究。作为这项研究的结果，获得了以下结果，这些结果已经发表在几个期刊和国际会议上。(1)研制成功高选择性识别锶、铯离子的A型沸石吸附剂。我们还研究了吸附剂的吸附性能与选择性和晶体结构的关系。(2)阐明了在离子交换机制下，靶离子的吸附先于吸附。(3)用几丁质、氧化铝、二氧化硅等几种粘结剂制备了毫米量级的颗粒状吸附剂。阐明了最佳的粘结剂及吸附剂与粘结剂的用量比。我们还开发了一种使用挤出机的新型造粒方法。(4)详细考察了一些实验条件对人工深海中稀有金属选择性回收的影响。我们研究了在柱式模块系统的吸附-解吸操作下颗粒吸附剂的耐久性。