Waste Management, Год журнала: 2024, Номер 179, С. 66 - 76
Опубликована: Март 11, 2024
Язык: Английский
Robotics and Computer-Integrated Manufacturing, Год журнала: 2023, Номер 87, С. 102693 - 102693
Опубликована: Дек. 2, 2023
Язык: Английский
Процитировано
16
Journal of Environmental Management, Год журнала: 2023, Номер 344, С. 118334 - 118334
Опубликована: Июнь 22, 2023
Язык: Английский
Процитировано
15
ACS Applied Polymer Materials, Год журнала: 2023, Номер 5(12), С. 10042 - 10052
Опубликована: Ноя. 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.
Язык: Английский
Процитировано
15
Production & Manufacturing Research, Год журнала: 2023, Номер 11(1)
Опубликована: Март 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.
Язык: Английский
Процитировано
14
Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154747 - 154747
Опубликована: Авг. 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
Язык: Английский
Процитировано
5
Metals, Год журнала: 2024, Номер 14(1), С. 95 - 95
Опубликована: Янв. 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
Язык: Английский
Процитировано
4
Journal of Environmental Management, Год журнала: 2023, Номер 351, С. 119779 - 119779
Опубликована: Дек. 12, 2023
Язык: Английский
Процитировано
11
Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(28), С. 40778 - 40794
Опубликована: Май 31, 2024
Язык: Английский
Процитировано
4
Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 154339 - 154339
Опубликована: Июль 27, 2024
Язык: Английский
Процитировано
4
Process Safety and Environmental Protection, Год журнала: 2024, Номер unknown
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
4