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用食品残留物污染的塑料垃圾包装的分离和描述

Svetlana Tretsiakova-McNally¹, Helen Lubarsky¹, Ashlene Vennard²

¹Belfast School of Architecture and the Built Environment, Ulster University, Belfast Campus, York Street, Belfast BT15 1AP, UK.

|July 14, 2023

概括

一种新的干洗技术有效地将食品废物与塑料包装分开,达到93%至97%的污染去除. 这项创新提高了LDPE,PP和PET等混合塑料的可回收性,用于工业应用.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

塑料包装废弃物,特别是当它们被食品残留污染时,会带来重大回收挑战.
目前的回收方法往往难以有效地将有机污染物从塑料材料中分离出来.
开发高效的预处理技术对于改善塑料废弃物回收利用至关重要.

研究的目的:

开发和演示一种新的概念验证 (POC) 处理技术,用于将食品残留物从难以回收的塑料包装废物中分离出来.
用先进的分析技术来描述分离的塑料和食品废物部分.
评估该技术在塑料回收中大规模应用的潜力.

主要方法:

开发一种用于污染塑料废物的新型"干净"处理技术.
使用富里埃变换红外光谱法 (FT-IR) 进行光谱分析.
热量和热量测量特性包括热重力测量分析 (TGA),微孔燃烧热量测量 (MCC) 和"炸弹"热量测量.

主要成果:

通过POC技术,从塑料废物中消除了93%至97%的食品污染.
最佳的分离条件被确定为700rpm叶片旋转速度和15s的停留时间.
鉴定证实,清洗后的塑料部分的主要成分是可回收的低密度聚乙烯 (LDPE),聚烯 (PP) 和聚乙烯四甲 (PET).

结论:

开发的技术显示出在更大规模的食品污染塑料废物"干净"的巨大潜力.
了解分离分量的热降解和热量计性质对于优化下游回收过程,如热解,至关重要.
这一进步有助于重复使用和回收以前难以回收的塑料包装材料.

关键词:

微塑料微塑料的使用塑料包装塑料包装的使用塑料回收塑料回收的回收.聚合物的降解降解.热解是一种热解过程.

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