Treatment technology of Cr, Se, and As in wastewater by layered double oxide containig capability for uptake, reduction, and acid neutralization

层状双氧化物吸收、还原、酸中和处理废水中铬、硒、砷技术

• 批准号: 23651061
• 负责人: KAMEDA Tomohito
• 金额: $ 2.41万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23651061/
• 关键词: 層状複水酸化物; クロム; セレン; ヒ素; 吸着; 還元; 鉄イオン; ドープ; インターカレーション; 六価クロム; 廃水処理

Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). Similarly, the Fe2+-doped LDH could take up As(V) and Se(VI) from an aqueous solution. The excellent performance of this LDH for the removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and to obey pseudo-second order kinetics.

镁铝层状双氢氧化物通过将MgCl_2、FeCl_2和AlCl_3的混合溶液滴加到恒定pH的NaOH溶液中，制备了掺杂Fe ~（2+）的（Mg-Al LDH）。发现掺杂Fe ~（2+）的LDH能够通过Cr_2O_（72-）与插层Cl ~-的阴离子交换，生成Cr（OH）_3，Cr_2O_7 ~（2-）在生成的FeO（OH）表面的吸附。类似地，掺杂Fe 2+的LDH可以从水溶液中吸收As（V）和Se（VI）。这种LDH的优良性能是由Mg-Al LDH的阴离子交换性能和掺杂到Mg-Al LDH中的Fe 2+的还原活性引起的。这一过程可以被认为是通过Langmuir型吸附发生的，并且服从伪二级动力学。

项目成果

Removal of chromium and selenium by Fe^<2+> doped Mg-Al layered double hydroxides

Fe^2掺杂Mg-Al层状双氢氧化物去除铬和硒

• 发表时间: 2013
• 作者: Eisuke Kondo;Tomohito Kameda;Toshiaki Yoshioka
• 通讯作者: Toshiaki Yoshioka

Removal of heavy metal oxyanions by ferrous iron-doped Mg-Al layered double hydroxides

亚铁掺杂镁铝层状双氢氧化物去除重金属氧阴离子

• 发表时间: 2013
• 作者: Eisuke Kondo;Tomohito Kameda;Toshiaki Yoshioka
• 通讯作者: Toshiaki Yoshioka

Fe2+をドープしたマグネシウム-アルミニウム系層状複水酸化物によるCr(VI)の除去

Fe2+掺杂镁铝层状双氢氧化物去除Cr(VI)

• 作者: 近藤瑛佑;亀田知人;吉岡敏明
• 通讯作者: 吉岡敏明

Removal of Heavy Metals in Solution by Fe^<2+> Doped Mg-Al Layered Double Hydroxides

Fe^<2>掺杂Mg-Al层状双氢氧化物去除溶液中重金属

• 发表时间: 2013
• 作者: Eisuke Kondo;Tomohito Kameda;Toshiaki Yoshioka
• 通讯作者: Toshiaki Yoshioka

Removal of chromium and selenium by Fe2+ doped Mg‐Al layered double hydroxides

Fe2+掺杂Mg-Al层状双氢氧化物去除铬和硒

• 作者: Eisuke Kondo;Tomohito Kameda;Toshiaki Yoshioka
• 通讯作者: Toshiaki Yoshioka