Environmental cleanup through plant-based remediation, known as phytoremediation, involves using plants to absorb, degrade, or contain hazardous substances such as heavy metals, pesticides, and petroleum compounds from contaminated soil and water. Plants offer a cost-effective and ecologically sensitive alternative to conventional cleanup methods, making them valuable tools in restoring polluted environments. Research in this area explores how plants tolerate and accumulate toxins, informing both conservation efforts and the development of purpose-bred species for large-scale remediation projects.
Scientists isolated a landfill bacterium, Paenarthrobacter nicotinovorans JPEA-9, that breaks down low-density polyethylene — the plastic used in bags and film — at the highest rate ever recorded for its genus, degrading 14.4% of plastic powder in 20 days and confirming the mechanism involves surface oxidation.
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The bacterium degraded LDPE powder by 14.4 ± 0.1% in just 20 days — the highest rate reported for the Paenarthrobacter genus
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LDPE film lost 7.0 ± 0.8% of its weight over 120 days, with confirmed surface roughening and reduced water repellency
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Degradation mechanism involves oxidation: infrared spectroscopy showed increased oxygen-containing functional groups forming on the plastic surface
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