Standoff Identification of Plastic Waste Using a Low-Cost Compact Laser-Induced Breakdown Spectroscopy (LIBS) Detection System.

IF 2.2 3区 化学 Q2 INSTRUMENTS & INSTRUMENTATION Applied Spectroscopy Pub Date : 2024-10-01 Epub Date: 2024-08-09 DOI:10.1177/00037028241268348
Rajendhar Junjuri, Arun Prakash Gummadi, Manoj Kumar Gundawar
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Abstract

We report the standoff/remote identification of post-consumer plastic waste by utilizing a low-cost and compact standoff laser-induced breakdown spectroscopy (ST-LIBS) detection system. A single plano-convex lens is used for collecting the optical emissions from the plasma at a standoff distance of 6.5 m. A compact non-gated Czerny-Turner charge-coupled device (CCD) spectrometer (CT-CCD) is utilized to analyze the optical response. The single lens and CT-CCD combination not only reduces the cost of the detection system by tenfold, but also decreases the collection system size and weight compared to heavy telescopic-based intensified CCD systems. All the samples investigated in this study were collected from a local recycling plant. All the measurements were performed with only a single laser shot which enables rapid identification while probing a large number of samples in real time. Furthermore, principal component analysis has shown excellent separation among the samples and an artificial neural network analysis has revealed that plastic waste can be identified within ∼10 ms only (testing time) with accuracies up to ∼99%. Finally, these results have the potential to build a compact and low-cost ST-LIBS detection system for the rapid identification of plastic waste for real-time waste management applications.

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快递:使用低成本紧凑型激光诱导击穿光谱 LIBS 检测系统对塑料垃圾进行对峙识别。
我们报告了利用低成本、紧凑型对射激光诱导击穿光谱(ST-LIBS)检测系统对消费后塑料垃圾进行对射/远程识别的情况。该系统使用单平面凸透镜收集等离子体在 6.5 米远距离上的光发射,并使用紧凑型非门控 Czerny-Turner 电荷耦合器件 (CCD) 光谱仪 (CT-CCD) 分析光响应。单透镜和 CT-CCD 的组合不仅将探测系统的成本降低了十倍,而且与基于重型望远镜的增强型 CCD(ICCD)系统相比,还减小了收集系统的尺寸和重量。本研究调查的所有样品都是从当地一家回收厂收集的。所有的测量都只用了一次激光照射,这样就能在实时探测大量样品的同时进行快速识别。此外,主成分分析表明样品之间的分离效果极佳,人工神经网络分析表明,仅在 10 毫秒(测试时间)内就能识别塑料垃圾,准确率高达 99%。最后,这些结果有望建立一个小巧、低成本的 ST-LIBS 检测系统,用于快速识别塑料垃圾,实现实时垃圾管理应用。
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来源期刊
Applied Spectroscopy
Applied Spectroscopy 工程技术-光谱学
CiteScore
6.60
自引率
5.70%
发文量
139
审稿时长
3.5 months
期刊介绍: Applied Spectroscopy is one of the world''s leading spectroscopy journals, publishing high-quality peer-reviewed articles, both fundamental and applied, covering all aspects of spectroscopy. Established in 1951, the journal is owned by the Society for Applied Spectroscopy and is published monthly. The journal is dedicated to fulfilling the mission of the Society to “…advance and disseminate knowledge and information concerning the art and science of spectroscopy and other allied sciences.”
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