锆钇废料制备氧化钇和磷酸锆吸附剂及其性能评价

doi:10.19964/j.issn.1006-4990.2023-0305

Abstract

Abstract:

Yttrium-Stabilized Zirconia（YSZ） is a material with excellent performance，which generates a large amount of solid waste such as cutting edges during its production and use，and its recycling helps to protect the environment and the effective use of resources.However，due to the stable nature of the waste material，how to recycle and convert it into valuable products has become the key to the effective utilization of resources.It was proposed a route to convert zirconium-yttrium waste into zirconium hydroxide and yttrium oxalate intermediates and further into zirconium hydrogen phosphate and yttrium oxide adsorbents to increase the added value of zirconium-yttrium resource products in this paper.This synthetic route employed ethanol as a dispersing agent.Zirconium hydroxide，oxalic acid，and disodium hydrogen phosphate were mixed in the ratio of 1∶2∶2 by mole，and reacted at 373 K for 6 h to produce layered zirconium phosphate.The adsorption capacity of layered zirconium phosphate for potassium ions was 151.6 mg/g，which could reduce the potassium concentration in simulated hyperkalemic serum to the normal human level of 4.51 mmol/L without excessive loss of sodium ions，using ethanol as a dispersion aid and reacting at 373 K for 6 h.Yttrium oxide，obtained by calcination of yttrium oxalate ammonia hydrate，was used as an efficient adsorbent for sulfate.The results showed that the yttrium oxide obtained by calcination of yttrium oxalate ammonia hydrate at 1 073 K maintained 98.6% of sulfate removal when added at 10 g/L in a strongly acidic solution.The process of sulfate adsorption by yttrium oxide followed the Langmuir isothermal adsorption model and belonged to monomolecular layer adsorption.Its quasi-secondary kinetic constant was 2.03×10^-3 g/（min·mg），which was chemisorption.

Key words: zirconium-yttrium waste, zirconium phosphate, yttrium oxide, adsorption

CLC Number:

TQ134.12

XU Mengyao, ZHANG Xin, HE Kunpeng, HE Jian, JIANG Wei. Preparation of yttrium oxide and zirconium phosphate adsorbents from zirconium-yttrium waste and evaluation of their performance[J]. Inorganic Chemicals Industry, 2024, 56(3): 116-124.

Figures/Tables 18

Table 1

Fig.1

Fig.2

Table 2

Fig.3

Fig.4

Table 3

Fig.5

Table 4

Kinetic model fitting results of adsorption ofpotassium ions by zirconium phosphate"

拟合模型	拟合方程	R²
颗粒内扩散模型	$Q t = 4.408 t 0.5 + 84.43$	0.846 7
准一级动力学模型	$l g (66.99 - Q t) = 1.826 - 0.002 3 t$	0.924 1
准二级动力学模型	t/ $Q t$ $= 0.153 3 + (1 / 171.53) t$	0.999 7

Table 4

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Table 5

Fig.12

Fig.13

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元素	曲线方程	拟合度（R²）
Na	y=9 121x	0.999 99
K	y=925.3x	0.999 71

吸附温度/K	Langmuir			Freundlich
吸附温度/K	Q_max/ （mg·g^-1）	K_L/ （L·mg^-1）	R²	n	K_F/（mg^1-1/ⁿ ·L^1/ⁿ ·g^-1）	R²
283	183.22	0.003 2	0.929 7	13.99	2.09	0.975 6
293	182.51	0.003 1	0.915 0	9.17	1.81	0.977 8
303	168.33	0.002 9	0.979 2	15.48	2.25	0.991 1

温度/ K	Langmuir			Freundlich
温度/ K	Q_max/ （mg·g^-1）	K_L/ （L·mg^-1）	R²	n	K_F/（mg^1-1/ⁿ · L^1/ⁿ ·g^-1）	R²
283	121.49	0.142 5	0.992 6	1.266	2.707	0.948 9
293	126.91	0.173 6	0.998 2	1.235	2.786	0.947 1
303	131.18	0.207 8	0.996 5	1.338	4.191	0.911 2
313	133.46	0.220 9	0.995 2	1.367	5.348	0.914 3
323	141.55	0.241 3	0.998 7	1.476	7.871	0.924 5

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Inorganic Acid-Base-Salt Committee of CIESC

Preparation of yttrium oxide and zirconium phosphate adsorbents from zirconium-yttrium waste and evaluation of their performance

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