Abstract

Each year, more than 5 million Waste Mobile Phones (WMP) is generated in Japan. Since WMPs contain many rare metals and precious metals, it is essential to collect and recycle high-value metal resources from them effectively. Although multiple stakeholders have already developed WMP collection routes, these WMP collection routes’ current status is unclear. Furthermore, some WMP collection routes can only collect a small number of WMP, and so, their resource efficiency is low. This research aims to clarify each WMP collection route’s characteristics and evaluate their resource efficiency by conducting interview research on related stakeholders and the WMP dismantle experiment. The result shows that local government, authorized recyclers, and telecom carriers are the major stakeholders in collecting WMPs in Japan. To improve the WMP collection rate in cities with high population densities, using the local government’s collection route and installing an authorized recycler’s collection station is considered to be more effective. In cities with low population densities, the collection stations built by authorized recyclers are sufficient. The collection stations can also improve recycling behavior by offering points. Furthermore, the telecom carriers are encouraged to participate in the WMP collection business, but they should figure out a way to monitor the flow route of secondhand phones they exported and prompt the proper recycling of exported phones.

Highlights

  • Since 1995, along with economic development, mobile phones have become popular in Japan

  • Results and Discussion based on the interview research result, original experiment, and calculation, we clarified the characteristic of each Waste Mobile Phones (WMP) collection route and demonstrated each collection route’s resource efficiency

  • This study investigated the WMP collection routes in Japan and clarified the characteristics of each WMP collection route

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Summary

Introduction

Since 1995, along with economic development, mobile phones have become popular in Japan. By the end of 2011, the total number of mobile phone contracts in Japan exceeded the total Japanese population [1]. In 2016, the penetration rate of mobile phones in Japan reached 70% [2]. It is easy to predict that the number of mobile phones in Japan will keep increasing in the future. During the manufacturing process of mobile phones, a massive amount of natural metal resources are required, and large amounts of rare metals and precious metals are unevenly distributed. Most of the tungsten (W), zinc (Zn), manganese (Mn), lead (Pb), palladium (Pd), and platinum (Pt) that are used in mobile phones are extracted from the natural reserves of China, Mexico, Russia, and South Africa [3]. As Japan lacks these resources, it is necessary for the Japanese government to maintain a stable supplement of these natural metal resources

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