| Title | Dynamic Environmental-Economic Impacts Analysis of Upgrading e-Waste Recycling from Crude Disassembly to Precise Disassembly |
|---|---|
| ID_Doc | 10436 |
| Authors | Yuan, XH; Zhang, LG; Gao, YC; Xu, ZM |
| Title | Dynamic Environmental-Economic Impacts Analysis of Upgrading e-Waste Recycling from Crude Disassembly to Precise Disassembly |
| Year | 2024 |
| Published | Acs Sustainable Chemistry & Engineering, 12, 19 |
| Abstract | Since e-waste consists of intricate components with a high level of integration, disassembly is crucial for separating components to facilitate subsequent processing. Traditional crude disassembly (CD) involves major parts detachment (shell, electromotor, etc.) and causes incomplete separation between metals and nonmetals, necessitating subsequent complex metal refinement processes. In contrast, precise disassembly (PD) focuses on tiny component separation (screw, chip, etc.), obtaining reusable single metals to melting regeneration without requiring refinement. However, despite reduced environmental burdens from metal refinement and increased economic value of dismantled parts, the environmental-economic superiority of PD remains ambiguous, because there is higher energy input and labor costs during the dismantling process. Hence, this study evaluates dynamic environmental-economic impacts of upgrading CD to PD for five typical household appliances recycling, from material composition, economic benefits, and carbon emission aspects. The result reveals that PD increases the amount of reusable metals by 5.7%-140.2%, reduces carbon emissions by 393-1775 kg CO2-equiv/t, and increases economic benefits by 5.12-8.11 USD/t. Dynamic analysis indicates that PD's environmental-economic benefits will be further enhanced through scientific-technical advances and energy structure upgrades. Furthermore, the e-waste types and components most suitable for PD are confirmed. Overall, PD demonstrates superior environmental-economic advantages over CD. These findings provide guidance for disassembly upgrades to reduce carbon emissions and boost the circular economy. |
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