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

Polymer Testing

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

Abstract: In the recycling of polymer e-waste, there is a pressing need for rapid measurement technologies for the simple identification and classification of these materials. The goal of this work was to instantly identify e-waste polymers by laser-induced breakdown spectrometry (LIBS). The studied polymers were acrylonitrile-butadiene-styrene (ABS), polystyrene (PS), polyethylene (PE), polycarbonate (PC), polypropylene (PP), and polyamide (PA). Emission lines were selected for C (247), H (656), N (742 + 744 + 747), and O (777), as well as the molecular band of C2 (516), and the ratios of the emission lines and molecular band were utilized. Classification models, k-nearest neighbors (KNN) and soft independent modeling of class analogy (SIMCA), were used to rank the polymers. Both constructed models gave satisfactory results for the validation samples, with average accuracies of 98% for KNN and 92% for SIMCA. These results prove the predictive analytical capabilities of the LIBS technique for plastic identification and classification.

Authors: Vinicius Câmara CostaFrancisco Wendel Batista AquinoCaio Marcio ParanhosEdenir Rodrigues Pereira-Filho.

Polymer Testing

Volume 59, May 2017, Pages 390-395

Link: http://www.sciencedirect.com/science/article/pii/S0142941816312090?via%3Dihub

DOI: https://doi.org/10.1016/j.polymertesting.2017.02.017

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

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O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.