UNSW Study: Waste Textiles Offer Sustainable Activated Carbon Alternative

A new study from the UNSW Sustainable Materials Research and Technology (SMaRT) Centre, published by Elsevier, indicates that manufacturing activated carbon from textile and other waste streams could offer a more sustainable alternative to conventional production methods. The research examined how end-of-life textiles can be transformed through a thermal manufacturing process into activated carbon, a material widely used for purification and filtration in water, air, and industrial applications.

According to the SMaRT Centre, this innovative approach could significantly reduce the environmental impacts associated with traditional coal-based manufacturing of activated carbon.

A Greener Manufacturing Pathway

SMaRT Centre Director Professor Veena Sahajwalla stated that the findings highlight the potential to address both waste and resource challenges through new manufacturing pathways. She emphasized the possibility of ameliorating the growing global waste textiles problem by reforming this waste stream into valued activated carbon materials.

Significant Sustainability Advantages

The manufacturing process demonstrated substantial environmental benefits, including a 36 percent reduction in embodied carbon and more than a 99 percent reduction in embodied energy demand compared with conventional coal-derived activated carbon.

Professor Sahajwalla indicated that this suggests superior sustainability advantages over conventional methods.

A lifecycle assessment further indicated improved environmental performance across several impact categories, including global warming potential and fossil fuel depletion.

Diverse Textile Applications

The research assessed 14 common textile types, encompassing materials such as cotton, polyester, wool, and blended fabrics. It found that 11 of these types were suitable for activated carbon manufacturing. However, materials like polyurethane and leather performed poorly in the conversion process.

The UNSW SMaRT Centre stated that this study supports the development of small-scale manufacturing technologies capable of recovering valuable materials from complex waste streams. The research was conducted under the Australian Research Council Industrial Transformation Research Hub into Microrecycling.