摘要
钇稳定氧化锆是一种性能优异的材料,在其生产和使用过程中会产生大量切削边角料等固体废物,对其进行回收处理,有助于环境保护和资源有效利用。由于废料性质稳定,将其回收和转化为有价值的产品成为资源有效利用的关键。研究提出将锆钇废料转为氢氧化锆和草酸钇中间体,并进一步转化为磷酸锆和氧化钇吸附剂,增加锆钇废料资源化新路线。该合成路线以乙醇为分散助剂,氢氧化锆、草酸和磷酸二氢钠按物质的量为1∶2∶2比例混合,373 K反应6 h制得层状磷酸锆对钾离子的吸附容量为151.6 mg/g,可将模拟高钾血清中的钾浓度降至人体正常水平(4.51 mmol/L)且不损失过多的钠离子。以草酸钇氨水合物煅烧得到的氧化钇,可作为硫酸根的高效吸附剂。研究结果显示,在1073 K煅烧草酸钇氨水合物得到的氧化钇,在添加量为10 g/L、强酸性溶液的条件下,可保持98.6%的硫酸根去除率。硫酸根离子被氧化钇吸附的过程遵循Langmuir等温吸附模型,属于单分子层吸附,其准二级动力学常数为2.03×10^(-3) g/(min·mg),属于化学吸附。
YttriumStabilized 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 zirconiumyttrium waste into zirconium hydroxide and yttrium oxalate intermediates and further into zirconium hydrogen phosphate and yttrium oxide adsorbents to increase the added value of zirconiumyttrium 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 1073 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 quasisecondary kinetic constant was 2.03×10^(-3) g/(min·mg),which was chemisorption.
作者
徐梦瑶
张欣
何琨鹏
何坚
蒋炜
XU Mengyao;ZHANG Xin;HE Kunpeng;HE Jian;JIANG Wei(Sinopec Northwest Oilfield Branch,Urumchi 830011,China;School of Chemical Engineering,Sichuan University,Chengdu 610065,China)
出处
《无机盐工业》
CAS
CSCD
北大核心
2024年第3期116-124,共9页
Inorganic Chemicals Industry
基金
四川大学-中国石油化工股份有限公司西北油田分公司联合开发项目(21H1137)。
关键词
锆钇废料
磷酸锆
氧化钇
吸附
zirconium-yttrium waste
zirconium phosphate
yttrium oxide
adsorption
