Hydrazine (N 2 H 4 ) can injure lungs, liver, kidney, and central nervous system, and it may be carcinogenic to humans. It is used for a chemical decontamination process (HyBRID) of a nuclear facility. After the decontamination process, wastewater containing a high concentration of hydrazine is generated. Thus, it is necessary to remove hydrazine from the wastewater by a safe level. The decomposition tests of hydrazine in wastewater surrogates were conducted in this study at various pH levels, molar ratios of H 2 O 2 /N 2 H 4 , and stirring rates. Through these tests, it was found that the decomposition of hydrazine can be promoted by Cu(OH) 2 at pH of 9.0. Based on this result, a decomposition behavior of hydrazine was derived, and optimal conditions for the removal of hydrazine in a wastewater by a level of less than 10 ppb were determined. The optimal conditions were successfully demonstrated in a pilot-scale of chemical decontamination system. After a chemical decontamination process of a nuclear facility, wastewater containing a high concentration of hydrazine is generated. The decomposition tests of hydrazine in wastewater surrogates were conducted at various conditions using H 2 O 2 . It was found that the decomposition of hydrazine can be promoted by Cu(OH) 2 at pH of 9.0. Optimal conditions for the removal of hydrazine in a wastewater by a safe level of less than 10 ppb were determined. The optimal conditions were successfully demonstrated in a pilot-scale of chemical decontamination system.

中文翻译：

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核设施化学去污过程废水中高浓度肼的分解

肼（N 2 H 4 ）对肺、肝、肾和中枢神经系统有伤害，对人体有致癌作用。它用于核设施的化学净化过程 (HyBRID)。在去污过程之后，会产生含有高浓度肼的废水。因此，有必要在安全水平下从废水中去除肼。本研究在不同的 pH 值、H 2 O 2 /N 2 H 4 的摩尔比和搅拌速率下进行了废水替代物中肼的分解测试。通过这些测试，发现在pH为9.0时，Cu(OH) 2 可以促进肼的分解。基于此结果，推导出了肼的分解行为，并确定了去除废水中肼小于 10 ppb 的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。在核设施的化学净化过程之后，会产生含有高浓度肼的废水。使用 H 2 O 2 在各种条件下进行废水替代物中肼的分解试验。发现在pH为9.0时，Cu(OH) 2 可以促进肼的分解。确定了以低于 10 ppb 的安全水平去除废水中肼的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。产生含有高浓度肼的废水。使用 H 2 O 2 在各种条件下进行废水替代物中肼的分解试验。发现在pH为9.0时，Cu(OH) 2 可以促进肼的分解。确定了以低于 10 ppb 的安全水平去除废水中肼的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。产生含有高浓度肼的废水。使用 H 2 O 2 在各种条件下进行废水替代物中肼的分解试验。发现在pH为9.0时，Cu(OH) 2 可以促进肼的分解。确定了以低于 10 ppb 的安全水平去除废水中肼的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。确定了以低于 10 ppb 的安全水平去除废水中肼的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。确定了以低于 10 ppb 的安全水平去除废水中肼的最佳条件。最佳条件在化学净化系统的中试规模中得到了成功证明。