December 30, 2025 | The Conversation |
Researchers in South Africa have found a way to transform discarded pineapple leaves into valuable nanoparticles that address both environmental pollution and forensic needs. Pineapple leaves, usually treated as agricultural waste and dumped or burned, can be converted into carbon-based nanoparticles coated with zinc oxide. These particles effectively absorb toxic copper ions from industrial wastewater, helping to reduce heavy metal pollution that threatens human health and aquatic ecosystems.
The study is the first to show that agricultural waste–derived nanoparticles can both remove heavy metals from water and be reused afterward. Once saturated with copper, the nanoparticles can be ground into a powder suitable for revealing latent fingerprints, offering a safer and more sustainable alternative to conventional chemical fingerprint powders.
This dual-use innovation supports circular economy principles by turning waste into low-cost, multifunctional products. It also reduces the expense of wastewater treatment and forensic materials. Researchers suggest further testing in real wastewater facilities and forensic labs, alongside policy support and industry collaboration, to scale up the technology and maximize its environmental and societal benefits.
