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Marcelo Pilotto Cenci

Bio: Marcelo Pilotto Cenci is an academic researcher from Universidade Federal do Rio Grande do Sul. The author has contributed to research in topics: Medicine & LED lamp. The author has an hindex of 3, co-authored 5 publications receiving 23 citations.

Papers
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Journal ArticleDOI
TL;DR: By the novelty of separating and characterizing the LED lamp's components, a process which has not yet been studied, the results allow for a better interpretation of the different materials distribution within the lamps which is essential to improve the efficiency of a recycling route.

31 citations

Journal ArticleDOI
TL;DR: This study proposes an innovative, clean and effective physical method to segregate the valuable and critical materials into different fractions while enhancing their concentration: particle size separation followed by electrostatic separation.

15 citations

Journal ArticleDOI
TL;DR: This work aims to characterize the various components of different brands of LED lamps to provide novel data on the precious and critical metals' amounts, and highlights the occurrence of gold in all analyzed components, relevant to the economic viability of future recycling routes.
Abstract: LED lamps already conquered the market of general lighting and are expected to generate a substantial stream of e-waste in the coming years. The challenge of recycling LED lamps have emerged, and it is essential to address both environmental and economic aspects to achieve a circular economy. LED lamps contain precious and critical metals, which can be found in electrical components and in the LED itself, making them a prospective waste for recycling initiatives. However, data about the concentration and distribution of these metals in the LED lamp's components are still scarce and uncertain. This work aims to characterise the various components of different brands of LED lamps to provide novel data on the precious and critical metals' amounts. Gold and silver were found in all brands of lamp, and we highlight the occurrence of gold in all analysed components, in concentrations between 0.01% and 0.07%, which is relevant to the economic viability of future recycling routes (gold and silver can contribute with USD 4340.00 per ton of LED lamps). The critical metals gallium, yttrium, and cerium were found in LEDs, while cobalt, barium, gallium, antimony, and manganese were found in printed circuit boards (PCBs). Additionally, the elements lead, cadmium, and arsenic were characterised due to their association with environmental and human toxicity.

12 citations

Journal ArticleDOI
TL;DR: In this article, the authors evaluated mass loss in each stage of the recycling process for metal recovery from PCBs of controllers and temperature indicators of cold chambers and found that the mass losses in the comminution stages were 12.69 % and are lower than those found in other related works that used mixtures of different types of PCBs, whereas in this work only one model plates were analyzed.
Abstract: The aim of this work was to evaluate mass loss in each stage of the recycling process for metal recovery from PCBs of controllers and temperature indicators of cold chambers. The stages of process consists of grinding, particle size classification, magnetic and electrostatic separation. It was analyzed 13 kg of PCBs. These PCBs were crushed and ground. The ground material were subjected to magnetic and electrostatic separator. The losses in the comminution stages were 12.69 % and are lower than those found in other related works that used mixtures of different types of PCBs, whereas in this work only one model plates were analyzed. 27.2 % absolute mass loss we reached out after particle size separation with Tyler Series with 1 mm sieve presents the higher mass losses in the whole process and this fraction was not processed as it results in PCBs powder dust that interferes negatively in the electrostatic separation. Comparing the losses in the stages of shredding of PCBs employed in temperature controllers with other studies involving PCBs from the automotive industry and from computers and cell phones, is remarkable that this type of board presents significantly greater potential to be processed for recovery of its materials.

7 citations


Cited by
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Journal ArticleDOI
TL;DR: The demand for lithium has skyrocketed in recent years primarily due to three international treaties (Kyoto Protocol, Paris Agreement and UN Sustainable Development Goals) as mentioned in this paper, all of which are pushing for the integration of more renewable energy and clean storage technologies in the transportation and electric power sectors to curb CO2 emissions and limit the adverse effects of CO2-promoted climate change.

117 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide a descriptive insight into recovery techniques of light-emitting diodes (LED) waste using examples from other e-waste such as fluorescent lamps, liquid crystal displays, and LED production dust.
Abstract: End-of-life light-emitting diodes are electronic waste containing valuable and critical metals such as rare earth elements (REE) and gallium. These metals face the risk of supply disruption with increasing demand and the difficulty of their extraction and separation through mineral and metallurgical processing. Hence, this study aims to provide a descriptive insight into recovery techniques of light-emitting diodes (LED) waste using examples from other e-waste such as fluorescent lamps, liquid crystal displays, and LED production dust. An investigation was conducted following scoping searches, and a gap in research on LED recycling technologies was found. It was noticed that the possible technologies to recover gallium and REE from LED are physical processes, pyrolysis, bioleaching, and acid leaching, followed by purification processes such as solvent extraction and precipitation. The advantages and disadvantages of each method for industrial application were addressed in terms of efficiency in recovery of gallium and REE, selectivity, and energy consumption. Based on this analysis, hydrometallurgical processing has been identified as the most suitable method to recover gallium and REE from LEDs due to its high efficiency in recovering metals from low-grade secondary raw material. Despite the energy consumption, a first pyrometallurgical step is recommended for gallium recovery. Furthermore, the selection of recovery processes must be consistent with the light-emitting products due to differences in LEDs composition. Overall, the future perspective for LED recycling is to exploit the economic potential of this e-waste, aiming at a circular economy that enables the conservation of natural resources.

35 citations

Journal ArticleDOI
TL;DR: In this paper , a comprehensive review in the context of pyrolysis of e-waste and its sustainability is provided, including the structure and components of the five significant types of ewaste, including printed circuit boards (PCBs), lithium-ion batteries (LIBs), tantalum capacitors (TCs), light-emitting diodes (LEDs), and liquid crystal displays (LCDs), are first discussed.

26 citations

Journal ArticleDOI
TL;DR: This study proposes an innovative, clean and effective physical method to segregate the valuable and critical materials into different fractions while enhancing their concentration: particle size separation followed by electrostatic separation.

15 citations