Ultrasound-assisted synthesis of nanosized zero-valent iron for metal cations extraction and wastewater treatment applications

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Mikhailov Yu, I.^1 ; Lysov, D.V.^1 ; Levina, V.V.^1 ; Mazov, I.N.^1 ; Gusev, A.A.^1 ; Yudintseva, T.I.^1 ; Kuznetsov, D.V.^1

National University of Science and Technology MISiS, 4 Leninsky prospect, Moscow

119049, Russia^1

关键词: Borohydride reductions;    Chemical precipitation;    Functional properties;    High temperature reduction;    Nanosized zero-valent iron;    Oxidative conditions;    Physicochemical process;    Ultrasound irradiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012012/pdf
DOI  :  10.1088/1757-899X/112/1/012012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Nanosized zero-valent iron has shown good results in wastewater treatment and activation of physicochemical processes. Its applications in modern industry are complicated by high production costs of nanomaterials produced via existing synthesis routes. Therefore there is a need of cheap and high-productive methods of nanosized zero-valent iron with advanced functional properties. Improvement of oxidative conditions with additions may find its place in extraction of rare-earth metals, where high cost of nanomaterials could be viable. In this paper we studied an effect of ultrasonic irradiation on specific surface area and particle size of nanosized zero-valent iron synthesized by methods of chemical precipitation with high- temperature reduction in hydrogen flow and sodium borohydride reduction. Obtained results showed significant decrease of particle size and differences in particles morphology depending on presence of ultrasonication during synthesis and on chosen method. For ultrasonic-assisted synthesis with 100% amplitude, particle size calculated from specific surface area was 70 nm for sample synthesized by chemical precipitation with high-temperature reduction and 35 nm for borohydide reduction method compared to 63 nm for reference sample without ultrasonication.