An Efficient Sulfuric Acid- and Hydrazine-based Process for Recycling Wastewater Generated From U(VI)-Contaminated Soil-Washing

被引：0

作者：

Lee, Hyun-Kyu ^{[1
]}

Jun, Byung-Moon ^{[1
]}

Kim, Tack-Jin ^{[1
]}

Park, Sungbin ^{[1
]}

Choi, Seonggyu ^{[1
]}

Jung, Jun-Young ^{[1
]}

Eun, Hee-Chul ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, 111 Daedeok Daero 989beon Gil, Daejeon 34057, South Korea

来源：

JOURNAL OF NUCLEAR FUEL CYCLE AND WASTE TECHNOLOGY | 2024年 / 22卷 / 02期

关键词：

Soil-washing; Uranium precipitation; Hydrazine decomposition; Wastewater treatment; Water recycling; SULFIDE COMPLEXES; STABILITY; IRON; PRECIPITATION; REMEDIATION; SOLUBILITY; MECHANISM; REMOVAL; NUCLEAR; CO2;

D O I：

10.7733/jnfcwt.2024.020

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

This study aimed to develop an efficient recycling process for wastewater generated from soil-washing used to remediate uranium (U(VI))-contaminated soil. Under acidic conditions, U(VI) ions leached from the soil were precipitated and separated through neutralization using hydrazine (N2H4). N2H4, employed as a pH adjuster, was decomposed into nitrogen gas (N2), water (H2O), and hydrogen ions (H+) by hydrogen peroxide (H2O2). The residual N2H4 was precipitated when the pH was adjusted using sulfuric acid (H2SO4) to recycle the wastewater in the soil-washing process. This purified wastewater was reused in the soil-washing process for a total of ten cycles. The results confirmed that the soil-washing performance for U(VI)-contaminated soil was maintained when using recycled wastewater. All in all, this study proposes an efficient recycling process for wastewater generated during the remediation of U(VI)-contaminated soil.

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页码：159 / 171

页数：13