A prototype of a portable optical sensor for the detection of transparent and translucent microplastics in freshwater
A prototype of a portable optical sensor for the detection of transparent and translucent microplastics in freshwater
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DOI：
10.1016/j.chemosphere.2019.05.114
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发表时间：
2019-09-01
期刊：
影响因子：
8.8
通讯作者：
Peiponen, Kai-Erik
中科院分区：
文献类型：
--
作者：
Asamoah, Benjamin O.;Kanyathare, Boniphace;Peiponen, Kai-Erik
水体中的微塑料污染是一个令人担忧的问题，需要加以解决。然而，诸如大小、形状和它们对光的外观（透明或半透明）等问题使得光学检测变得困难。本文研究了一种便携式原型光学传感器的可行性，该传感器能够同时测量塑料微粒的镜面激光反射和透射。用光电二极管和CCD相机分别记录了镜面反射信号和透射干涉图。结合这两种检测模式，可以在一定体积的淡水中以高置信度筛选透明聚对苯二甲酸乙二醇酯（PET）和半透明低密度聚乙烯（LDPE）两种微塑料的类型、大小和非平面性。原则上，该原型可用于检测漂浮的微塑料，以及在自然水体中沉淀的微塑料，以及在水处理厂的水过滤中。(C) 2019作者。Elsevier Ltd.出版。
Microplastic pollution in water bodies is an alarming problem which needs to be addressed. However, issues such as size, shape and their appearance to light (transparent or translucent) make it difficult to be optically detected. Here, a feasibility study of a portable prototype optical sensor with the capability of measuring simultaneously specular laser light reflection and transmission from microplastic particles is presented. The specular reflection signal and the transmitted interference pattern were recorded with a photodiode and a CCD camera, respectively. With the combination of these two modes of detection, it is possible to screen the type, size, and nonplanarity of two microplastics types, i.e., transparent polyethylene terephthalate (PET) and translucent low-density polyethylene (LDPE), in a volume of freshwater, with high confidence. In principle, the prototype could be used for the detection of both floating microplastics as well as microplastics experiencing sedimentation in natural water bodies, and in water filtration in water treatment plants. (C) 2019 The Authors. Published by Elsevier Ltd.