scholarly journals Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards

Metals ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 441 ◽  
Author(s):  
Željko Kamberović ◽  
Milisav Ranitović ◽  
Marija Korać ◽  
Zoran Andjić ◽  
Nataša Gajić ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Hydrometallurgical Process ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Metals Recovery

Hydrometallurgical Process for Copper Recovery from Waste Printed Circuit Boards (PCBs)

2011 ◽  
Vol 32 (2) ◽  
pp. 90-104 ◽  
Author(s):  
Hoang Long Le ◽  
Jinki Jeong ◽  
Jae-Chun Lee ◽  
Banshi D. Pandey ◽  
Jae-Min Yoo ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Copper Recovery ◽  
Hydrometallurgical Process ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards

scholarly journals A Hydrometallurgical Process for Cu Recovery from Printed Circuit Boards

2021 ◽  
Vol 5 (1) ◽  
pp. 56
Author(s):  
Dimitrios Vlasopoulos ◽  
Paschalis Oustadakis ◽  
Styliani Agatzini-Leonardou ◽  
Petros Tsakiridis ◽  
Emmanouella Remoundaki
Keyword(s):  
Printed Circuit Boards ◽  
Copper Recovery ◽  
Hammer Mill ◽  
Hydrometallurgical Process ◽  
Circuit Boards ◽  
Experimental Conditions ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Filter Dust ◽  
Pregnant Solution

The current study presents an effort to develop a sustainable hydrometallurgical process for the recovery of copper from waste printed circuit boards (PCBs) to be applied at local small to medium industrial units. The process aims to separate and recover copper from filter dust produced during the crushing of PCBs using a hammer mill in a recycling facility. Due to the high plastic content in the dust (approximately 30% w/w), the metal fraction was separated gravimetrically, and the material originated consisted mainly of Cu (23.8%), Fe (17.8%), Sn (12.7%), Pb (6.3%), Zn (3.4%), Al (3.3%), Mn (1.6%), and Ni (1.5%). Prior to copper recovery, the dust was leached with HCl as a pretreatment step. During this step, more than 80% of iron, zinc, and tin were leached out. The resulting solid consisted mainly of Cu (37.6%) and Fe (10.7%), leading to a copper enrichment of around 60% in the powder. The leaching of copper was conducted in a two-step process using H2SO4 as a leaching agent with the addition of H2O2 as an oxidizing agent. The experimental conditions had low energy requirements (no heating or agitation needed). The leaching of Cu reached 98%. Despite the pretreatment step, the concentration of other metals (Fe, Zn, Ni) in the pregnant solution was too high to proceed to electrowining. Therefore, the organic solvent ACORGA M5640 was selected for the extraction of copper from the pregnant solution. The extraction was conducted in two stages at pH equilibrium 1.5, and the loaded organic phase was stripped with HCl in two steps. The strip liquor was suitable for electrowinning.

scholarly journals Composites of Styrene-Butadiene Block-Copolymer Reinforced with Waste Printed Circuit Boards (WPCB)

2020 ◽  
Vol 57 (1) ◽  
pp. 92-99
Author(s):  
Paul Ghioca ◽  
Ramona Marina Grigorescu ◽  
Lorena Iancu ◽  
Rodica-Mariana Ion ◽  
Madalina-Elena David ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Printed Circuit Boards ◽  
Rapid Development ◽  
Mechanical Analysis ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Metals Recovery ◽  
Shoe Soles ◽  
Styrene Butadiene

In recent years, the rapid development of electronic equipment led to millions of tons of waste printed circuit boards (WPCB) generated in the entire world rising important concerns regarding its recycling. Besides the metals recovery, intensively studied, the reuse of the nonmetals is especially difficult. In this study, the non-metallic fraction from the waste of printed circuit boards is used as reinforcing filler of a styrene-butadiene block-copolymer. The composites were characterized by mechanical and dynamo-mechanical analysis and thermo-gravimetry. The study aimed the reintroduction into the economic circuit of WPCB as composites suitable for the production of shoe soles injected directly on the footwear faces and as bitumen modifiers for road coverings.

Progress in the Preparation of Composites Based on the Nonmetallic Fractions Recycled from Waste Printed Circuit Boards

2010 ◽  
Vol 160-162 ◽  
pp. 518-523 ◽  
Author(s):  
Wei Qiao Liu ◽  
Xing Xing Wang ◽  
Wei Ning Lei ◽  
Tong Ming Shang ◽  
Quan Fa Zhou
Keyword(s):  
Renewable Resources ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Research Directions ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Inorganic Composites ◽  
Metals Recovery ◽  
Waste Pcbs ◽  
Properties Of Composites

From the use of renewable resources and environmental protection, recycling of waste printed circuit boards (PCBs) receives wide concerns as the amounts of scrap PCBs increases dramatically. However, the recycle technology for waste PCBs in China is still immature. Previous studies focused on metals recovery, but resource utilization for nonmetallic fractions (NMFs) is relatively fewer. In this paper, the physical properties of the recovered nonmetallic powder is briefly introduced. The preparation of composites including organic and inorganic composites through the recycling NMFs was reviewed. In addition, the research directions of preparation of composites based on recycling NMFs were put forward. Firstly, the study on the reaction mechanism of composites preparation should be strengthened to explore the reasons why the additional quantity and particle size of NMFs powder have effects on the properties of composites. Secondly, a suitable coupling agent should be chosen to improve the the interface compatibility between the NMFs and matrix.

Metals recovery from dust derived from recycling line of waste printed circuit boards

2017 ◽  
Vol 165 ◽  
pp. 452-457 ◽  
Author(s):  
Fangfang Wang ◽  
Yuemin Zhao ◽  
Tao Zhang ◽  
Guangwen Zhang ◽  
Xing Yang ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Metals Recovery
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