Identification and classification of polymer e-waste using laser-induced breakdown spectroscopy (LIBS) and chemometric tools

Costa, Vinícius Câmara; Aquino, Francisco Wendel Batista de; Paranhos, Caio Márcio; Pereira-Filho, Edenir Rodrigues

doi:10.1016/j.polymertesting.2017.02.017

Cited by 95 publications

(34 citation statements)

References 32 publications

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“…Comumente, as amostras sólidas podem ser analisas de forma direta, tanto in natura 41 como na forma de pastilhas preparadas a partir do material moído e/ou triturado. 40 Para amostras sólidas que apresentam homogeneidade apropriada, é possível dispensar a etapa de preparo, como é o caso de amostras de vidro, 42 ligas metálicas, 43 polímeros, 44 fósseis 45 e ligas ortopédicas. 46 Cabe informar que a homogeneidade das amostras referidas são provenientes da constituição original das mesmas, e por isso a etapa de preparo é dispensada.…”

Section: Preparo De Amostrasunclassified

“…68 A utilização dessas ferramentas são indispensáveis quando o objetivo é usar as informações espectrais para proposição de modelos de classificação. As ferramentas referidas foram empregadas com sucesso na proposição de modelos de classificação para amostras de ligas metálicas, 43 polímeros, 44 couros, 86 cosméticos, 87 pinturas pré-histórica, 88 forense, 89 rochas vulcânicas 90 entre outros. [91][92][93] Os métodos não supervisionados de reconhecimento de padrões, como a principal component analysis (PCA) e hierarchical cluster analysis (HCA) também são empregados.…”

Section: Libs E Quimiometriaunclassified

“…[283][284][285] De acordo Grégoire et al 286 é possível distinguir os polímeros aromáticos (PS e PC) dos polímeros alifáticos (PE, PP e PA), usando somente as linhas e banda de emissão (C 2 , CN, H, C, N e O), e as razões entre linhas de emissão e banda molecular (H/C 2 , H/C and O/N). Em trabalho proposto por Costa et al 44 diferentes razões entre linhas de emissão e bandas moleculares (C/H, C/C 2 , C/N, C/O, H/C 2 , H/N, H/O, C 2 /N, C 2 /O e O/N) foram usadas para identificar seis polímeros (ABS, PS, PC, PE, PP e PA). Modelos de classificação KNN e SIMCA foram usados para classificação.…”

Section: Resíduos Eletrônicosunclassified

See 2 more Smart Citations

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Costa¹,

Augusto²,

Castro³

et al. 2019

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This review attempts to present a broad view of the technique laser-induced breakdown spectroscopy (LIBS), since its origin, fundamentals, sample preparation strategies, use of chemometric tools for data processing, the advantages and limitations with regard to qualitative and quantitative analysis, aplications and future trends as an analytical technique that is in consolidation in analytical chemistry. LIBS is a rapid and versatile, which is able of providing qualitative and quantitative analytical information for practically any sample, in a virtually non-destructive way, without any substantial sample preparation. The instrumentation is simple, robust, compact, and enables remote analysis. The advancement of the LIBS applications in the areas of agriculture, environmental, food, biological/pharmaceutical, forensic, metallurgy and electronic waste were discussed in detail in this review. We consider that this review will be an important tool concerning dissemination of the LIBS, mainly for audience of undergraduate courses, and disciplines related to instrumental analysis.

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Section: Preparo De Amostrasunclassified

Section: Libs E Quimiometriaunclassified

Section: Resíduos Eletrônicosunclassified

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Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Costa¹,

Augusto²,

Castro³

et al. 2019

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“…The PLS-DA corrected classified 99% and 93% for genuine and false samples, respectively. Costa et al 67…”

Section: Forensic Purposesmentioning

confidence: 99%

Chemometrics in analytical chemistry – an overview of applications from 2014 to 2018

et al. 2019

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A compilation of papers published between 2014 and 2018 was evaluated. Many papers related to multivariate calibration and classification have been reported, as well as, design of experiments applications and artificial intelligence methods. Some applications were highlighted, as medical and pharmaceutical, food analysis, fuels, biological and forensic for the chemometric techniques on this review. Most studies are related to developing methods for practical solutions in industry or routine analysis. A promising scenario is shown considering the number of published papers: a total of 832 for this period using the keywords, multivariate classification, multivariate calibration, analysis, chemometrics, prediction, analytical chemistry, artificial neural networks (ANN), design of experiments (DoE) and factorial design. An useful overview for Analytical Chemistry researchers´ combined with Chemometrics is presented in this review.

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“…However, polymers tainted in mass with carbon black become invisible to near-infrared hyperspectral imagery (NIR-HSI), the currently most used technology with sink-float for industrial sorting [13,14], mandatory to obtain satisfactory properties through mechanical recycling [15,16]. Development of new technologies to overcome this dark plastics sorting issue is currently subject to tremendous research [17][18][19][20][21][22][23][24] and could enable proper recycling of sorted WEEP. Study of styrenics recyclability, especially after ageing, is thus a hot topic.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Styrenic Plastics During Recycling: Impact of Reprocessing Photodegraded Material on Aspect and Mechanical Properties

Signoret¹,

Edo²,

Lafon³

et al. 2020

J Polym Environ

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The major technical limitations in polymer recycling are their incompatibility between each other and their ageing. In this study, impact reinforced styrenics, namely HIPS and ABS, were evaluated in the scope of their alterations through recycling photooxidized material. In this purpose, plates were photodegraded in both natural and accelerated conditions. FTIR-ATR was used to monitor their ageing. After the desired ageing durations, plates were ground, extruded and injected into ISO1 dumbbell tensile test specimens to simulate recycling of degraded polymers. Strong interactions were observed between photooxidation and polymer processing through photometry measures, associated color changes, tensile and impact properties. It was noticed that unaged materials displayed only moderated alterations through recycling. Because of their close chemistry, HIPS and ABS share several modifications but ABS was less altered and mainly impact properties were affected. HIPS and ABS difference of sensibilities could be rooted in PB phases different morphologies and grafting between the two materials.

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Identification and classification of polymer e-waste using laser-induced breakdown spectroscopy (LIBS) and chemometric tools

Cited by 95 publications

References 32 publications

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

Chemometrics in analytical chemistry – an overview of applications from 2014 to 2018

Degradation of Styrenic Plastics During Recycling: Impact of Reprocessing Photodegraded Material on Aspect and Mechanical Properties

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