Adsorption of U(VI)-CO3/Ca-U(VI)-CO3 by Amidoxime-functionalized Hydrothermal Carbon

Zhibin ZHANG; Runze ZHOU; Zhimin DONG; Xiaohong CAO; Yunhai LIU

doi:10.15541/jim20190397

Journals >Journal of Inorganic Materials >Volume 35 >Issue 3 >Page 352 > Article

Journal of Inorganic Materials
Vol. 35, Issue 3, 352 (2020)

Adsorption of U(VI)-CO₃/Ca-U(VI)-CO₃ by Amidoxime-functionalized Hydrothermal Carbon

Zhibin ZHANG, Runze ZHOU, Zhimin DONG, Xiaohong CAO, and Yunhai LIU^*

Author Affiliations

State Key Laboratory of Nuclear Resources and Environment, East China Institute of Technology, Nanchang 330013, China

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DOI: 10.15541/jim20190397 Cite this Article

Zhibin ZHANG, Runze ZHOU, Zhimin DONG, Xiaohong CAO, Yunhai LIU. Adsorption of U(VI)-CO₃/Ca-U(VI)-CO₃ by Amidoxime-functionalized Hydrothermal Carbon[J]. Journal of Inorganic Materials, 2020, 35(3): 352 Copy Citation Text

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1. Synthetic route for AO-HTC

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2. Design of experimental apparatus

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3. Effects of pH (a) and CO₃² (b) and Ca²⁺ concentration (c) on uranium adsorbed onto AO-HTC, breakthrough curves of soil column and AO-HTC column at different pH (d), CO₃^2- (e) and Ca²⁺ concentration (f)

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4. U(VI) speciation as a function of CO₃^2-concentration (a) and Ca²⁺ concentration (b) in water

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5. Thomas kinetic plots for the adsorption of U(VI) on red soils (a, c, e) and AO-HTC columns (b, d, f)

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6. Yoon-Nelson kinetic plots for the adsorption of U(VI) on red soils (a, c, e) and AO-HTC columns (b, d, f)

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	pH	CO₃^2- /(mmol·L^-1)	Ca²⁺ /(mmol·L^-1)	Thomas model			Yoon-Nelson model
	pH	CO₃^2- /(mmol·L^-1)	Ca²⁺ /(mmol·L^-1)	K_Th/(´10^-3, mL·min^-1·g^-1)	q_o/(´10^-2, mg∙g^-1)	R²	K_YN/min^-1	τ/min	R²
Soil column	7.0	4	2	2.089	1.5	0.93	0.043	76	0.93
	7.5			2.143	1.3	0.97	0.042	67	0.97
	8.0			2.161	1.1	0.96	0.043	55	0.96
AO-HTC column	7.0	4	2	0.338	8.8	0.91	0.014	444	0.91
	7.5			0.367	7.4	0.83	0.007	371	0.83
	8.0			0.683	5.3	0.91	0.014	266	0.81
Soil column	8.0	1	2	1.475	1.5	0.95	0.029	75	0.95
		2		1.797	1.1	0.96	0.036	55	0.96
		3		1.509	1.5	0.87	0.031	76	0.87
		4		2.161	1.1	0.96	0.043	55	0.96
AO-HTC column	8.0	1	2	0.364	9.8	0.95	0.007	492	0.95
		2		0.727	7.8	0.90	0.015	392	0.90
		3		0.619	6.1	0.92	0.012	307	0.92
		4		0.683	5.3	0.91	0.014	266	0.91
Soil column	8.0	4	0.5	1.367	1.8	0.96	0.027	94	0.96
			1.0	1.805	1.4	0.98	0.036	73	0.98
			1.5	2.275	1.0	0.95	0.046	52	0.95
			2.0	2.161	1.1	0.96	0.043	55	0.96
AO-HTC column	8.0	4	0.5	0.211	11.1	0.80	0.004	558	0.80
			1.0	0.239	7.8	0.94	0.005	393	0.94
			1.5	0.257	6.6	0.94	0.005	330	0.94
			2.0	0.683	5.3	0.91	0.014	266	0.91

Table 1. Parameters of Thomas and Yoon-Nelson models

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