Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards

Horațiu Vermeșan, Ancuța-Elena Tiuc and Marius Purcar
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Horațiu Vermeșan: Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, Bd. Muncii 103-105, Cluj-Napoca 400641, Romania
Ancuța-Elena Tiuc: Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, Bd. Muncii 103-105, Cluj-Napoca 400641, Romania
Marius Purcar: Faculty of Electrical Engineering, Technical University of Cluj-Napoca, G Baritiu, nr. 26, Cluj-Napoca 400027, Romania

Sustainability, 2019, vol. 12, issue 1, 1-23

Abstract: Waste from information technology (IT) and telecommunication equipment (WITTE) constitutes a significant fraction of waste from electrical and electronic equipment (WEEE). The presence of rare metals and hazardous materials (e.g., heavy metals or flame retardants) makes the necessary recycling procedures difficult and expensive. Important efforts are being made for Waste Printed Circuit Board (WPCB) recycling because, even if they only amount to 5–10% of the WITTE weight, they constitute up to 80% of the recovered value. This paper summarizes the recycling techniques applicable to WPCBs. In the first part, dismantling and mechanical recycling techniques are presented. Within the frame of electro-mechanical separation technology, the chain process of shredding, washing, and sieving, followed by one or a combination of magnetic, eddy current, corona electrostatic, triboelectrostatic, or gravity separation techniques, is presented. The chemical and electrochemical processes are of utmost importance for the fine separation of metals coming from complex equipment such as WPCBs. Thermal recycling techniques such as pyrolysis and thermal treatment are presented as complementary solutions for achieving both an extra separation stage and thermal energy. As the recycling processes of WPCBs require adequate, efficient, and ecological recycling techniques, the aim of this survey is to identify and highlight the most important ones. Due to the high economic value of the resulting raw materials relative to the WPCBs’ weight and composition, their recycling represents both a necessary environmental protection action, as well as an economic opportunity.

Keywords: recycling processes; IT waste; WEEE; Waste Printed Circuit Board (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2019:i:1:p:74-:d:300235

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