聚乙烯
高密度聚乙烯
电介质
材料科学
耗散因子
微波食品加热
聚丙烯
聚合物
污染物
危险废物
环境科学
低密度聚乙烯
复合材料
光电子学
废物管理
计算机科学
化学
有机化学
电信
工程类
作者
Renjith VishnuRadhan,Anil Lonappan,T. I. Eldho
标识
DOI:10.1016/j.jhazmat.2022.128224
摘要
Plastic-derived pollutants are hazardous and pervasive in the environment, and their detection is a challenge due to observational constraints of various dimensions. Physical, chemical, thermal, and spectroscopic methods are extensively used to identify microplastics in environmental systems, but fundamental challenges exist in the isolation and analysis of nanoplastics from environmental samples. The promising practices are often destructive, rendering the samples inutile for further investigations. In this paper, a technique based on the measurement of the dielectric properties of the samples, carried out using the rectangular cavity perturbation technique at the S-band of microwave frequency of 2-4 GHz is proposed. The ability of this method to identify some of the most abundant types of plastics found in the environment, polypropylene, low-density polyethylene, high-density polyethylene, and cross-linked polyethylene, is demonstrated. Electrical characteristics at microwave frequencies such as absorption factor, dielectric constant, and dielectric loss tangent are found useful in the identification of various polymers in the samples. Further, this method can be applied to identify other environmentally stable performance and engineering polymers, which are not often investigated in the environmental matrices for their hazardous effects. This non-destructive measurement method is quick and straightforward and can be further developed to identify a wide range of plastic materials present in various environmental compartments.
科研通智能强力驱动
Strongly Powered by AbleSci AI