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Development of new technology for elimination of anionic species of minor toxic elements (Se, Sb, As, B) from wastewaters

开发消除废水中微量有毒元素（Se、Sb、As、B）阴离子物种的新技术

基本信息

批准号：
15310045
负责人：
UMETSU Yoshiaki
金额：
$ 6.34万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

1. Fundamental study on the reactions for elimination of selenium species from wastewaters : The selenium dissolved in aqueous solutions has 4- and 6- valence oxidation states. Due to their complicated chemical behaviors of the selenium entities, the systematic consideration of the elimination technology for selenium is urgent requisite. As the fundamental systems involved in the selenium catch as insoluble solids, Se(IV)-Fe(III)-H_2O, Se(IV, VI)-Ca-H_2O and Se(IV, VI)-Ba-H_2O systems have been investigated and equilibrium phase diagrams for these systems have been constructed. Based on these information, a stream of operations for selenium elimination from wastewaters has been proposed.2. Reactions of MgO in binder materials during processing of contaminated soils : Some MgO-based binder materials for soils show more environmentally acceptable characteristics over Portland cement. When mixed with contaminated soils and water, MgO-based materials favorably adjusted pH of water phase where the heavy-metal components are leached and hydrolyzed as their hydroxides to eliminate and MgO is converted to the carbonate through HCO_3 in the aqueous phase. The anion of fluoride Can be electrostatically trapped onto the positively charged surface of the magnesium hydroxide formed on the MgO and Mg-silicate mineral constituent particles. The immobilization of the heavy-metal ions and toxic anions as well as granulation of the soils is realized using these MgO-based binder materials.3. Modification of Mg-Al double hydroxide through intercalation of organic acid ions : Inorganic double hydroxide can be modified by intercalation of organic acid anions such as EDTA, Dodecylsulfate and Naphthane sulphonate ions. The modified hybrid materials of hydroxide with functional groups of organic acids are effectively working as scavengers for heavy-metal ions and toxic organic materials like bisphenol A.

1.废水中硒形态去除反应的基础研究：溶于水溶液中的硒有4价和6价氧化态。由于硒的化学行为复杂，系统地研究硒的脱除技术是十分必要的。Se（IV）-Fe（III）-H_2O、Se（IV，VI）-Ca-H_2 O和Se（IV，VI）-Ba-H_2 O体系是硒作为不溶性固体捕集的基本体系，本文研究了它们的平衡相图。基于这些信息，已经提出了从废水中去除硒的操作流程。污染土壤处理过程中粘结材料中MgO的反应：一些用于土壤的MgO基粘结材料显示出比波特兰水泥更环保的特性。MgO基材料与污染土壤和水混合后，有利于调节水相的pH，使重金属以氢氧化物的形式溶出和水解，从而将重金属去除，MgO在水相中通过HCO 3转化为碳酸盐。氟化物阴离子可以被静电捕获到在MgO和硅酸镁矿物成分颗粒上形成的氢氧化镁的带正电表面上。这些MgO基粘结材料实现了对土壤中重金属离子和有毒阴离子的固定以及土壤的颗粒化.镁铝双氢氧化物的有机酸离子插层改性：无机双氢氧化物可以通过有机酸阴离子如EDTA、十二烷基硫酸根和萘磺酸根离子的插层改性。改性的氢氧化物与有机酸官能团的杂化材料可以有效地作为重金属离子和有毒有机物如双酚A的清除剂。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Phase equilibrium in the Fe_2O_3-SeO_2-H_2O system

Fe_2O_3-SeO_2-H_2O体系中的相平衡

DOI：
发表时间：
2005
期刊：
Hydrometallurgy 79
影响因子：
0
作者：
Tomohito Kameda;Tomohito Kameda;T.Kameda et al.;Tomohito Kameda;Tadahisa Nishimura
通讯作者：
Tadahisa Nishimura

Solubility and stability regions of barium selenites and barium selenates in aqueous solution at 25℃

亚硒酸钡和硒酸钡在25℃水溶液中的溶解度和稳定范围

DOI：
发表时间：
2004
期刊：
Canadian Metallurgical Quarterly Vol.43,No.1
影响因子：
0
作者：
Tomohito Kameda;Tomohito Kameda;T.Kameda et al.;Tomohito Kameda;Tadahisa Nishimura;Tomohito Kameda;Tomohito Kameda;Tadahisa Nishimura;Tomohito Kameda;T.Kameda et al.;Tomohito Kameda et al.;R.Hata;R.Hata;R.Hata
通讯作者：
R.Hata

SOLUBILITY AND SOLUBILITY REGIONS OF BARIUM SELENITES IN AQUWOUS SOLUTION AT 25℃

亚硒酸钡在25℃水溶液中的溶解度及溶解区域

DOI：
发表时间：
2004
期刊：
Canadian Metallurgical Quarterly Vol.43, No.1
影响因子：
0
作者：
Tomohito Kameda;Tomohito Kameda;T.Kameda et al.;Tomohito Kameda;Tadahisa Nishimura;Tomohito Kameda;Tomohito Kameda;Tadahisa Nishimura;Tomohito Kameda;T.Kameda et al.;Tomohito Kameda et al.;R.Hata;R.Hata
通讯作者：
R.Hata

Preparation and Characterization of Mg-Al Layered Double Hydroxide Intercalated with 2-Naphthane Sulphonate and 2,6-Naphthane Disulphonate

2-萘烷磺酸盐和2,6-萘烷二磺酸盐插层镁铝层状双氢氧化物的制备及表征