Recycling rare earth elements from waste cathode ray tube phosphors: Experimental study and mechanism analysis

  title={Recycling rare earth elements from waste cathode ray tube phosphors: Experimental study and mechanism analysis},
  author={Xiaofei Yin and Xiangmiao Tian and Yufeng Wu and Qijun Zhang and Wei Wang and Bin Li and Yu Gong and Tieyong Zuo},
  journal={Journal of Cleaner Production},
Abstract In this work, we developed a clean and efficient process for recycling rare earth elements from waste CRT phosphors. A mixture of sulfuric acid and hydrogen peroxide was used for the oxidative leaching of the rare earth elements, and the leaching efficiencies of both Y and Eu reached 99% under the optimal leaching conditions: 3 M H2SO4, 4 vol.% H2O2, 55 °C, and 1 h. The S2− was oxidized to S0, which efficiently avoided the sulfur pollution produced by existing technologies. The green… 
Recovery of Y and Eu from waste CRT phosphor using closed-vessel microwave leaching
Abstract Yttrium (Y) and europium (Eu) are critical rare earth elements (REEs) due to their high supply risk and importance for clean energy technologies. Their presence in electronic waste (e-waste)
Yttrium and europium recycling from phosphor powder of waste tube light by combined route of hydrometallurgy and chemical reduction
Abstract This paper deals with the recovery of yttrium and europium from waste tube light phosphor powder leach liquor using solvent extraction and chemical reduction route. Hydrochloric acid (2
Review of rare earth elements recovery from secondary resources for clean energy technologies: Grand opportunities to create wealth from waste
Abstract Rare earth elements (REEs) are vital components of high-tech electrical and electronic based materials. In the global scenario, the deposits of natural rare earth elements (REEs) are limited
Facile method for the selective recovery of Gd and Pr from LCD screen wastes using ultrasound-assisted leaching
Rare earth elements (REE) are essential for the production of technological devices. However, their high demand and low availability, together with an increase in electronic waste generation, compel
A preliminary study of the concentration of special purpose elements and precious metals in the enriched precipitates produced by a wet method of cathode-ray tube recycling
The purpose of the work is to investigate the existence and the possibility of recovering economically interesting elements, such as precious metals and rare earth elements, from phosphor layers of
Recovery of rare earth elements from waste streams using membrane processes: An overview
Abstract Recovery of rare earth elements (REEs) has become an attractive process owing to the high costs and limited availabilities of REEs. In addition, the recovery of REEs has become a necessity
Purification and comprehensive utilization of sapphire kerf waste
  • Shuai Wang, Y. Liu, +4 authors Huayi Yin
  • Materials Science
    Journal of Cleaner Production
  • 2019
Abstract Sapphire kerf waste (a fine powder) is a great potential source of high-purity α-Al2O3 and is currently discarded without reutilization, which is a waste of this resource and causes
Utilization of waste cathode ray tube funnel glass for ultra-high performance concrete
Abstract Cathode ray tube (CRT) funnel glass is classified as a hazardous waste because it contains lead, which can endanger the environment and human health. In this paper, an innovative
Characterization and recycling potential of the discarded cathode ray tube monitors
Abstract Abundantly available discarded cathode ray tubes are a serious threat to the environment and loss to resource conservation and therefore requiring immediate recycling efforts. In this study,
e-WASTE: Everything an ICT Scientist and Developer Should Know
The composition of contemporary electronic devices and the possibilities and difficulties of recycling the elements they contain are surveyed and the knowledge of e-waste issues is crucial also in the scientific world.


Green Recovery of Rare Earths from Waste Cathode Ray Tube Phosphors: Oxidative Leaching and Kinetic Aspects
In this work, we developed a green and efficient process for the recovery of rare earths from waste cathode ray tube phosphors. The mixture of hydrochloric acid and hydrogen peroxide was identified
Reclamation and Harmless Treatment of Waste Cathode Ray Tube Phosphors: Novel and Sustainable Design
In this paper, we propose a novel and sustainable process for recycling rare earths (REs) and zinc (Zn) simultaneously from waste cathode ray tube (CRT) phosphors. First, 95% of the impurities such
Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors
A comparison study for extraction of rare earths from waste Cathode Ray Tube (CRT) phosphors was carried out before and after dilute acid pretreatment process. The results show that the optimum
Rare earth elements recovery from fluorescent lamps: A new thermal pretreatment to improve the efficiency of the hydrometallurgical process
Abstract The literature is rich of scientific works regarding the recovery of yttrium and europium from red phosphors of lamps and it is poor of papers about the extraction of terbium, cerium and
Selective extraction and recovery of rare earth metals from phosphor powders in waste fluorescent lamps using an ionic liquid system.
An effective recovery of the rare earth metals, Y, Eu, La and Ce, from the metal impurities, Fe, Al and Zn, was achieved from the acidic leach solution of phosphor powders using an ionic liquid containing DODGAA as novel extractant system.
Recovery of waste rare earth fluorescent powders by two steps acid leaching
The effects of the acid leaching and alkali fusion on the leaching efficiency of Y, Eu, Ce, and Tb from the waste rare earth fluorescent powders were investigated in this paper. The results show that
The recycling of rare earths from waste tricolor phosphors in fluorescent lamps: A review of processes and technologies
Abstract Rare earths have become the most important strategic resources, widely used as functional materials in industry and many other aspects of life due to its optical, electrical, and magnetic
Characterization, recovery potentiality, and evaluation on recycling major metals from waste cathode-ray tube phosphor powder by using sulphuric acid leaching
Abstract Phosphor powder from waste cathode ray tubes (CRT) was leached by acid leaching technology, and also, “H 2 SO 4  + H 2 O 2 ” system was utilized to reduce the release of poisonous gas H 2 S
Recycling of rare earths from NdFeB magnets using a combined leaching/extraction system based on the acidity and thermomorphism of the ionic liquid [Hbet][Tf2N]
The continuous miniaturization of electric motors, hard disks and wind turbines is causing an increasing demand for high-performance neodymium–iron–boron magnets (NdFeB). The supply risk for the
A hydrometallurgical process for the recovery of terbium from fluorescent lamps: Experimental design, optimization of acid leaching process and process analysis.
Terbium and rare earths recovery from fluorescent powders of exhausted lamps by acid leaching with hydrochloric acid was the objective of this study and the results showed that temperature and pulp density were significant with a positive and negative effect, respectively.