Quantitative assessment of industrial symbiosis for the promotion of circular economy: a case study of the printed circuit boards industry in China's Suzhou New District

2015 ◽  
Vol 90 ◽  
pp. 211-219 ◽  
Author(s):  
Zongguo Wen ◽  
Xiaoyan Meng
Keyword(s):  
Circular Economy ◽  
Quantitative Assessment ◽  
Printed Circuit Boards ◽  
Industrial Symbiosis ◽  
Circuit Boards ◽  
Printed Circuit

scholarly journals Green Zero-Waste Metal Extraction and Recycling from Printed Circuit Boards

2021 ◽  
Vol 5 (1) ◽  
pp. 39
Author(s):  
Halimeh Askari Sabzkoohi ◽  
Georgios Kolliopoulos
Keyword(s):  
Circular Economy ◽  
Printed Circuit Boards ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Metal Extraction ◽  
Circuit Boards ◽  
Acid Base ◽  
Zero Waste ◽  
Printed Circuit ◽  
Extraction Of Metals

The development of a truly circular economy necessitates the recovery and recycling of resources from secondary streams. In this work, we studied the extraction of metals from printed circuit boards (PCBs) using choline chloride: ethylene glycol deep eutectic solvents: Cu, Ni, Zn, and Sn were selectively extracted from the PCBs, with >75% extraction after 72 h for Cu, Ni, and Sn, and circa. 45% extraction for Zn. This solvometallurgical approach promises to minimize the use of water and acid/base reagents in processing. The results show a considerable ability to compete with current methods of metal extraction and therefore generate a strong potential to attain the goal of a sustainable circular economy via zero-waste green urban mining.

scholarly journals Industrial cleaning with Qlean Water – a case study of printed circuit boards

2013 ◽  
Vol 47 ◽  
pp. 19-25 ◽  
Author(s):  
Mattias Lindahl ◽  
Niclas Svensson ◽  
Bo H. Svensson ◽  
Erik Sundin
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Industrial Cleaning

Cleanup Case Study of Waste Printed Circuit Boards on Illegal Dumping Sites

2013 ◽  
Vol 726-731 ◽  
pp. 2865-2869
Author(s):  
Chih Yen Chou ◽  
Ching Jung Chang ◽  
Alex Wang ◽  
Pei Yao Wu ◽  
Chung Pao Wu
Keyword(s):  
Heavy Metal ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Toxic Heavy Metal ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Acid Washing ◽  
Industrial Technology Research Institute ◽  
Contamination Removal

This paper study was commenced to treat fatal contamination at the Er-Jen River, supplied water for agricultural irrigation, aquaculture and industrial in Kaohsiung and Tainan Area, when the Sixth River Management of Water Resources Agency (WRA) developed the project to build flood embankment. The fatal contamination was throw into the discard by illegal manufacturer which discarded the wastage of printed circuit boards, toxic heavy metal contained sludge, and waste aluminum slag. The treatment project was conducted by Industrial Technology Research Institute (ITRI) on preliminary tests, cleanup planning, and process supervision to ensure contamination removal, flood protection, and landscape improvement. The accumulative volume cleaned and screened on this site reached 45,159 cubic meters, whereas 378.25 tons of waste printed circuit boards, 12,833 tons of toxic heavy metal contained sludge, and 31,000 tons of general industrial wastages. The waste printed circuit boards through stripping/acid washing and screening, there are 334.653 tons valuable (including 0.143 tons of copper and 334.51 tons of wire casting materials) from the recycle extract and 43.597 tons of wastes that were not valuable for reutilize. Toxicity characteristic leaching procedure (TCLP) tests were conducted on the site after cleanup to verify the treatment work successful, because the rate of contamination removal was greater than 90%.

scholarly journals A Novel Hybrid Network Optimization Model for Printed Circuit Boards Recycling: A Circular Economy Perspective

2021 ◽  
Author(s):  
ABDULLAH YILDIZBASI ◽  
Yağmur ARIOZ
Keyword(s):  
Supply Chain ◽  
Circular Economy ◽  
Printed Circuit Boards ◽  
Closed Loop ◽  
Open Loop ◽  
Life Cycles ◽  
Electronic Equipment ◽  
Circuit Boards ◽  
Closed Loop Supply Chain ◽  
Printed Circuit

Abstract Due to the rapid advances in technology, increasing consumption rates and continuously released new products lead to shorter product life cycles, putting the sustainability issue under the spotlight. This, in turn, creates an unmanageable amount of waste that needs immediate care. Electrical and electronic equipment is one of the major contributors to this waste given that millions of metric tons of electronic waste are generated across the world each year, and only an insignificant percentage of which is recycled. The recycling of printed circuit boards, which accounts for considerable monetary value in waste electrical and electronic equipment has long been ignored due to the serious challenges in collection, dismantling, and recycling processes. In this study, the open-loop and closed-loop supply chain involving circular economy objectives is designed in order to increase the recyclability of valuable metals including gold, silver, copper, and palladium. In this regard, a mixed-integer linear programming model is developed that aims at maximizing the profit from the flow in the supply chain network. The model was tested with actual data obtained from a printed circuit board firm in Turkey that aimed optimal distribution in its supply chain. The results reveal that the product/material flows, which have an impact on the revenues, were among the most important factors affecting profitability. Considering the circular economy objectives, the revenue obtained in the hybrid open-loop and closed-loop supply chain is predominantly provided by the reuse and repair activities. In addition, the boundaries of the proposed model are tested with sensitivity analyses and the results are discussed extensively with conclusions on managerial implications.

CASE STUDY: APPLYING DATA MINING TO DEFECT DIAGNOSIS

2004 ◽  
Vol 03 (01) ◽  
pp. 69-83 ◽  
Author(s):  
M. C. JOTHISHANKAR ◽  
TONG (TERESA) WU ◽  
JOHNIE ROBERTS ◽  
JIUN-YAN SHIAU
Keyword(s):  
Data Mining ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Defect Diagnosis ◽  
One Year ◽  
Significant Data

One of the defects during the re-flow soldering in printed circuit boards is the defect of tombstone. It is a chip component that has partially or completely lifted off one end of the surface of the pad. Tombstones may be caused by several factors. In this paper, a description of the problem is presented with the factors that cause tombstones. Data mining approaches are presented to identify the factors that are significant. Data was collected over a period of one year to study this problem. Results are presented with suggested improvements.

Sign in / Sign up

Export Citation Format

Share Document