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Caring and killing: A human jellyfish story
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This article examines the ethical tension in proposals to use jellyfish bodies as microplastic-capture filters in wastewater treatment, asking who benefits from environmental remediation when the remedy itself kills the organisms enlisted to perform it.
The article centres on the idea of care in human attempts to remove microplastics from the water with the help of jellyfish bodies, asking: who is cared for, and who bears the cost for this care? It has recently come to light that jellyfish bodies have properties that can be utilized by humans to catch microplastics. This has led to an initiative to create filters for wastewater treatment plants that will use jellyfish bodies to catch microplastics from wastewater to mitigate the effects of human pollution. However, in the process of becoming products for various human uses (filters for wastewater plants, nutrients for agriculture, and even food), the jellyfish are killed. Humans thus seek to provide care for the underwater world by removing plastics, but to do so, they are using the bodies of jellyfish themselves.
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Researchers investigated how jellyfish mucus from Aurelia sp. captures nanoplastics and compared its efficiency to conventional water treatment coagulants. The study found that jellyfish mucin effectively captures polystyrene and acrylic nanoplastics from wastewater treatment plant effluent, suggesting it could serve as a sustainable, bio-based technology for removing nanoplastic contamination from water.
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Researchers tested whether jellyfish could serve as biological indicators of microplastic pollution in treated wastewater, finding that jellyfish in wastewater-receiving water contained more microplastics than those in cleaner water. The results support their use as bioindicators of plastic pollution levels.
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Jellyfish mucus was tested as a bioflocculent for removing polystyrene microplastics from water, and it successfully aggregated and settled plastic particles through physical entrapment and electrostatic interactions, demonstrating a novel nature-inspired approach to microplastic capture that could complement conventional water treatment methods.
Enhancing nano and microplastics destabilization: Synergistic effects of natural mucin and conventional coagulants in water and wastewater treatment
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Researchers investigated whether combining jellyfish mucus with conventional water treatment coagulants could improve removal of micro- and nanoplastics from water. The synergistic combination achieved over 90% removal efficiency with settling times under 5 minutes, outperforming either agent alone by leveraging bridging and entrapment mechanisms.
Towards robust and repeatable methods for studying interactions between jellyfish and microplastics
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This methodological review examined inconsistent approaches used in published studies of interactions between jellyfish and microplastics, finding that lack of standardized protocols makes cross-study comparisons difficult. Jellyfish are considered particularly susceptible to microplastic ingestion due to their feeding on small suspended particles, yet field sampling and laboratory experimental methods vary widely. The authors recommend standard protocols and call for more environmentally relevant experiments covering greater species diversity and different life history stages.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.