Effectiveness assessment of different methods of indium leaching from mobile phone screens

Anastasiia Chugainova,Larisa Rudakova,J Smyatskaya

doi:10.1051/e3sconf/202016101077

Anastasiia Chugainova, Larisa Rudakova + Show 1 more

Open Access

https://doi.org/10.1051/e3sconf/202016101077

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Abstract

The amount of electronic waste is growing annually all over the world, today it is almost 45 million tons. Less than 20% of electronic waste is being decontaminated and recycled. The rest is being taken to landfills or to places which are not supposed to store hazardous waste. This increases the adverse impact on the environment due to the fact that the waste consists of over 50% of hazardous components. At the same time, it also contains rare and expensive metals including indium. To extract indium from electronic waste it is necessary to justify the method of leaching. For this purpose research on leaching of indium from mobile phone screens has been done using various acids and parameters of the leaching process. As a result of the analysis, 6 methodologies were tested with various acid concentrations, the contact time of solid matter with a chemical reagent and temperature. The results of experimental research on the determination of metal concentration in mobile phone screens and the analysis of methods on indium leaching from mobile phone screens into a solution for further research are presented.

Highlights

The literature data presents the classification of electronic waste, which is shown in fig. 1 [1, 2]
An international group of the researchers has proven the economic efficiency of the extraction of metals from electronic waste compared with the extraction of metals from the natural environment [3]
The results of the qualitative and quantitative analysis of samples of the mobile phone screens for metal content are presented in the table 1

Summary

Introduction

The literature data presents the classification of electronic waste, which is shown in fig. 1 [1, 2]. These methods are mainly aimed at recycling the entire waste stream, which is not rational This is regard to the fact that electronic waste is a resource potential of the rare and expensive metals. Mobile phones include a significant amount of rare and expensive metals such as yttrium, indium, lanthanum, terbium, neodymium, gadolinium, praseodymium, gold, platinum and others. These metals are contained in various parts of mobile phones, the process of their extraction and disposal is complicating. The purpose of this study is to develop environmentally safe extraction of metals from the screens of mobile phones using the biotechnological method To achieve this goal it is necessary to solve the following tasks: 1. Select the most suitable leaching method for the efficient extraction of indium

Objects and methods of research

Results and discussion

Conclusion