Landfilling is viewed nowadays as a serious threat associated with various burdens and stressors on the urban environment. To date, there is little information available on actual value of landfilled waste namely plastic solid waste (PSW) resulting from mining operations. In this work, PSW reclaimed from an active unsanitary landfill site (MAB) has been studied with the aim of determining its thermal profile and degradation behaviour for future utilisation in thermo-chemical conversion (TCC) processes. The materials were characterised by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) in accordance with internationally approved test methods in a simulated pyrolytic environment. In addition, chemical analysis using Fourier Transform Infrared Spectroscopy (FTIR) was applied to study the nature of the materials reclaimed. The degradation kinetics of the reclaimed PSW were studied with the aim of determining the apparent activation energy (Ea) of the pyrolytic reactions. The Ea values determined ranged from 199 to 266 kJ mol⁻¹ which is in-line with pyrolytic reactions applicable for future use in fuel recovery units. TGA showed a clear shift in thermograms indicating a clear change in the degradation mechanism. The physico-chemical studies conducted on the materials also favours TCC treatment over other conventional end of life options such as physical (mechanical) recycling or incineration. The degradation mechanism was also determined from the Criado method showing that Avarami-Erofeve was the model that best represents PSW degradation. Overall, this work points towards future intervention schemes for reclaimed municipal solid waste (MSW) and in particular PSW favouring TCC technologies.

如今，垃圾填埋被视为与城市环境的各种负担和压力相关的严重威胁。迄今为止，关于采矿作业产生的填埋废物（即塑料固体废物）的实际价值的信息很少。在这项工作中，已经对从活跃的不卫生垃圾填埋场（MAB）回收的PSW进行了研究，目的是确定其热剖面和降解行为，以供将来在热化学转化（TCC）工艺中使用。根据国际认可的模拟热解环境中的测试方法，通过热重分析（TGA）和差示扫描量热法（DSC）对材料进行了表征。此外，使用傅里叶变换红外光谱（FTIR）进行化学分析还用于研究回收材料的性质。为了确定热解反应的表观活化能（Ea），对回收的PSW的降解动力学进行了研究。测定的Ea值范围为199至266 kJ mol^-1，与热解反应一致，适用于将来在燃料回收装置中使用。TGA的热分析图显示出明显的变化，表明降解机理发生了明显的变化。在材料上进行的物理化学研究也比其他常规寿命终止方法（例如物理（机械）回收或焚烧）更倾向于TCC处理。还通过Criado方法确定了降解机理，表明Avarami-Erofeve是最能代表PSW降解的模型。总体而言，这项工作指出了针对回收的城市固体废物（MSW），尤其是偏爱TCC技术的PSW的未来干预计划。