Circular Economy and Sustainability, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 3, 2025
Language: Английский
Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 344, P. 118334 - 118334
Published: June 22, 2023
Language: Английский
Citations
14
ACS Applied Polymer Materials, Journal Year: 2023, Volume and Issue: 5(12), P. 10042 - 10052
Published: Nov. 16, 2023
Vitrimers are polymers possessing a covalent adaptable network (CANs) that can undergo topological structural transformation under specific conditions, enabling material reprocessing. In this study, an active ester hardener containing imine bonds (TAI) was synthesized, and subsequently, epoxy resin with CANs (epoxy vitrimer, DGEBA/TAI) prepared, which exhibited excellent thermal stability (initial degradation temperature of 364 °C char yield at 800 30%), low water absorption (0.25 wt %), good dielectric properties (dielectric constant 3.37 loss 0.013). A comparative scratch healing test between the vitrimer conventional showed hard could not demonstrate self-healing ability derived from deformation recovery. The performance such vitrimers should focus on recycling reprocessing rather than capability. Thus, be effectively recycled reused by hot pressing or solvent method, resulting in resins tensile strength (70 MPa for hot-press welding 58 recycling) compared to originals (69 MPa). addition, materials allow shape reconfiguration through structure transformation, alternative analytical method proposed obtain relaxation time fitting equation stress curve, mitigate some interferences provide data reliability verification viscoelastic vitrimer.
Language: Английский
Citations
14
Robotics and Computer-Integrated Manufacturing, Journal Year: 2023, Volume and Issue: 87, P. 102693 - 102693
Published: Dec. 2, 2023
Language: Английский
Citations
14
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154747 - 154747
Published: Aug. 13, 2024
Electrodeposition is an attractive method to recover copper from waste printed circuit boards (WPCBs), which preferably requires metal-rich concentrate as raw material. In this study, a route for WPCBs was established assist electrodeposition by using flotation method. Different aqueous disperse medium in conventional flotation, we proposed ethanol improve dispersivity and sustainability. An H-type electrolytic cell with cation exchange membrane used electrolyze at the anode pure on cathode. The experiments were conducted investigate effect of grade proportion after rate copper, key factors (solid-to-liquid ratio applied voltage) affecting evaluated. results show that can greatly enrich content be increased 182.3 %, recovery 85.1 %. Increasing solid-to-liquid voltage increase deposition but affects stability electrodeposition. optimized parameters are: electrolyte temperature 50℃, 25 g/L, 10 V. purity electrodeposits reach over 99
Language: Английский
Citations
5
Production & Manufacturing Research, Journal Year: 2023, Volume and Issue: 11(1)
Published: March 2, 2023
The management of waste from electrical and electronic equipments (WEEEs) is a well-established topic in the extant literature. However, also automotive sector becoming relevant source WEEE, given even more presence components cars. Due to new European environmental policies, end-of-life vehicles (ELVs) volumes are expected grow next future, together with obsolete car electronics components. Hence, this work wants assess potential economic impact derived recycling processes adopting Net Present Value (NPV) as reference indicator. Through detailed sensitivity break-even point (BEP) analysis comparison different cases, identifies set scenarios useful for industrial actors willing enter market recycling. Results show an NPV varying 136,570 607,621 €/t decisive role played by gold recovery.
Language: Английский
Citations
13
Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 351, P. 119779 - 119779
Published: Dec. 12, 2023
Language: Английский
Citations
11
Metals, Journal Year: 2024, Volume and Issue: 14(1), P. 95 - 95
Published: Jan. 13, 2024
Printed circuit boards (PCBs) make up 3 to 5% of all electronic waste. The metal content spent PCBs can reach 40%. They usually contain valuable metals, such as Ag, Au, and Pd, well other metals Cu, Sn, Pb, Cd, Cr, Zn, Ni, Mn. However, the metallic part a whole PCB is 40–60% including Cu layers between fiberglass–polymer layers. paper describes economics (Ag, Pd)-containing concentrate preparation from raw PCB. We considered influence pre-treatment method before extraction on self-cost change. disintegration based high-energy impact particles material be ground, thus causing separation components In course work, single double direct grinding using was studied. For calculation, test batch 10,000 kg two types taken for estimation self costs potential profit in case complete Pd) plus extraction. It shown that studied PCB, it possible obtain 1144 1644 metal-rich concentrate, which should further subjected electro-hydrochlorination leaching. novelty this research lies fact technical economic analysis has been carried out newly developed combined technology processing This included mechanical electrochemical leaching with help active chlorine formed situ. real (not specially selected or prepared) waste were used process’s economical efficiency evaluation. main findings showed despite high PCBs, commercial value insignificant relation total income Pd sale. A correlation established decrease after separative by increase (by specific Cu) yield
Language: Английский
Citations
4
Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(28), P. 40778 - 40794
Published: May 31, 2024
Language: Английский
Citations
4
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154339 - 154339
Published: July 27, 2024
Language: Английский
Citations
4
International Journal of Chemical Reactor Engineering, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 17, 2025
Abstract The exponential growth of electronic waste pollution, including outdated electrical equipment, is a significant environmental and health concern. To protect the ecosystem from e-waste contamination, chemical engineering with its prominent processes such as leaching, pyrolysis, etc. can take leading role in resource recovery, eco-friendly management, sustainable recycling. This review presents detailed analysis recycling technologies perspective. Several smart solutions are discussed for managing recovering important components, semiconductor chips, metals (Pb, Al, Steel, Ni, Ag, Au, Pd), rare-earth minerals, Various recovered by electro-winning cell phones, integrated circuits, be used to produce corrosion-resistant appliances, IoT (Internet Things) devices like sensors, robotics related sciences. paper concentrates on strategies materials that make equipment devices, along roadblocks potential connected these strategies. study compares various procedures photoelectronic trash last few years. also focuses green upcycling effective e-trash management discarded keyboards into value-added goods musical tools innovative artistic sculptures seawater. portrays pyrometallurgical valorization digital rubbish printed circuit boards (PCBs), reactors, transistors e-waste-based nanorobots. emphasizes difficulty growing amounts globally damaging effects environment human caused improper disposal.
Language: Английский
Citations
0