Advanced techniques and mechanistic insights for high efficiency recovery of polymers recycling

The increasing global production and consumption of polymers have led to a pressing need for efficient recycling strategies to mitigate plastic waste and its environmental consequences. Conventional recycling methods, including mechanical, chemical, and thermal recycling, face limitations such as polymer degradation, high energy requirements, and inefficiencies in handling complex waste streams. This paper explores advanced recycling techniques that offer improved sustainability, efficiency, and circularity in polymer waste management. Emerging technologies such as enzymatic degradation, biological recycling, and electrochemical recycling provide selective breakdown of polymers into valuable monomers, enabling high-purity material recovery. Additionally, novel thermal and chemical recycling processes, including gasification, pyrolysis, hydrothermal liquefaction, and depolymerisation, present scalable solutions for recovering energy and raw materials from plastic waste. Cutting-edge innovations like microwave-assisted degradation, ultrasonic irradiation, and catalytic depolymerisation further enhance process efficiency and yield. Furthermore, additive manufacturing and thermomechanical recycling demonstrate the potential of integrating recycled polymers into high-value applications. The environmental and economic implications of these techniques underscore their viability in achieving a circular plastics economy by reducing dependency on virgin feedstocks, minimising landfill waste, and lowering greenhouse gas emissions. This review highlights the latest advancements in polymer recycling, offering insights into future directions for sustainable waste management and resource conservation.