Development of highly functionality magnetites and their application to removal of arsenic

高功能磁铁矿的开发及其在除砷中的应用

• 批准号: 18510077
• 负责人: OHE Kaoru
• 金额: $ 2.59万
• 依托单位: University of Miyazaki
• 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-18510077/
• 关键词: magnetite; As(V); As(III); adsorbents; environmental materials; zero point of charge; high specific surface area; groundwater pollution; チタン; 吸着; 除去; フェライト; 砒素; 吸着除去; 環境浄化

New functional magnetites were prepared by addition of elements such as Zr, Si, Mg, Ce and Ti to magnetite, and their applications to arsenic adsorption were investigated. Although the Si-magnetite has high specific surface area and high performance for arsenic removal, it cannot be used for removal of arsenic in groundwater because Si was eluted from the Si-magnetite. On the other hand, the zero point of charge of pH (PH_<zpc>) of Zr, Ce and Ti-magnetites were in the neutral pH range and they have high specific surface areas. The important factors for arsenic removal, pH_<zpc> and specific surface area were controlled by introducing different elements and mole ratios of element/ Fe when magnetites were prepared. The addition of Zr, Si, Mg, Ce and Ti cause the low crystal-growth rate of the magnetites to result in the amorphous structures. Adsorption properties for arsenic were investigated using Zr, Ce and Ti-magnetite. It was shown that Zr, Ce-magnetite effectively removed arsenic from its low concentration Ti-magnetite with Ti /Fe = 1 has a high specific surface area, 240m^2/g and the adsorption capacities of As (V) and As (III) were 0.85 and 1.2, respectively. These results were 4 - 6 times of the adsorption capacity of arsenic of the previously reported magnetites.

通过在磁铁矿中添加Zr、Si、Mg、Ce、Ti等元素，制备了新型功能磁铁矿，并研究了其对砷的吸附性能。虽然硅磁铁矿具有高比表面积和高除砷性能，但由于硅从硅磁铁矿中被洗脱，因此不能用于地下水中的砷去除。另一方面，<zpc>Zr、Ce和Ti磁铁矿的pH电荷零点（PH_）均在中性pH范围内，且具有较高的比表面积。在<zpc>制备磁铁矿时，通过引入不同的元素和元素/铁的摩尔比，控制了除砷的重要因素pH和比表面积。Zr、Si、Mg、Ce和Ti的加入使磁铁矿的晶体生长速率降低，导致非晶结构。研究了锆、铈、钛磁铁矿对砷的吸附性能。结果表明，锆铈磁铁矿对低浓度钛磁铁矿（Ti /Fe = 1）中的砷有较好的吸附效果，其比表面积为240m^2/g，对As（V）和As（III）的吸附容量分别为0.85和1.2。这些结果是以前报道的磁铁矿吸附砷容量的4 - 6倍。

项目成果

Preparation of ferrites and adsorptive removal of arsenic

铁氧体的制备及吸附除砷

• 发表时间: 2007
• 作者: R.;Tomimatsu;K.;Ohe;T.;Oshima;Y.;Baba
• 通讯作者: Baba

Removal o As(III) and As(V) in Groundwater Using Ferrite Adsorbents

使用铁氧体吸附剂去除地下水中的 As(III) 和 As(V)

• 发表时间: 2007
• 期刊: J.Ion Exchange 18
• 作者: K. Ohe;R. Tomimatsu;T. Oshima;Y. Baba
• 通讯作者: Y. Baba

Removal o As(III) and As(V) in Grouridwater Using Ferrite Adsorbents

使用铁氧体吸附剂去除地下水中的 As(III) 和 As(V)

• 发表时间: 2007
• 期刊: J. Ion Exchange 18
• 作者: K.;Ohe;R.;Tomimatsu;T.;Oshima;Y.;Baba
• 通讯作者: Baba

フェライトの調製とヒ素除去技術への応用

铁氧体的制备及其在除砷技术中的应用

• 发表时间: 2007
• 作者: 富松 塁;大栄 薫;大島 達也;馬場 由成
• 通讯作者: 馬場 由成

Adsorptive Removal of Arsenic from Contaminated Aqueous Solution Using Ferrites

使用铁氧体吸附去除污染水溶液中的砷

• 发表时间: 2006
• 期刊: The Proc.of Internation Symposium on Ion Exchange in Korea(2006) and 22nd annual Meeting of JAIE,(2006)
• 作者: K.Ohe;R.Tomimatsu;T.Ohshima;Y.Baba
• 通讯作者: Y.Baba