International Initiative Tackled Harmful Algal Blooms

A 15-nation project led by Chinese scientists deployed modified-clay technology to combat global algal outbreaks.

Updated on Sept. 28, 2026 in Environmental

A plume of light-colored clay settles onto the surface of murky green coastal water near rocks. — An international team of researchers has launched a global initiative using modified clay particles to bind and neutralize harmful algal blooms in coastal ecosystems. AI Illustration. Upload story photo >

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In the summer of 2026, researchers unveiled a global initiative to mitigate harmful algal blooms through a specialized clay-based technology. The project aims to integrate international monitoring and early warning systems to address the rising frequency of these environmental events.

Why it matters

Global warming and human activity are fueling more frequent and destructive algal blooms that threaten aquaculture and marine ecosystems. This collaborative effort seeks to standardize mitigation strategies to protect coastal economies from devastating financial losses.

The modified-clay treatment reduces algal density by over 80 percent within hours by binding with negatively charged cells. In the Gulf of Izmir, this technology helped reduce fish mortality from 87 tons in 2024 to 17 tons in 2025.

The players

Institute of Oceanology of the Chinese Academy of Sciences

This leading marine research organization developed the modified-clay technology used for mitigating algal blooms.

UNESCO

This United Nations agency hosted the conference in Paris where the international mitigation program was officially unveiled.

The details

The research team modifies natural clay particles to carry a positive surface charge, allowing them to bind effectively with negatively charged algal cells. Once the modified clay is sprayed onto affected water surfaces, the algae form flocs and sink, effectively removing them from the water column.

1989: A massive harmful algal bloom occurred in the Bohai Sea.
1991: The research team began experiments on modified-clay technology.
2024: Fish mortality reached 87 tons in the Gulf of Izmir.
2025: Fish mortality fell to 17 tons in the Gulf of Izmir.
Summer 2026: The global scientific program was unveiled at a UNESCO conference.

The Big Picture

This 15-nation initiative follows the pattern set by the Institute of Oceanology of the Chinese Academy of Sciences algal bloom mitigation program. The effort marks an international scaling of the specific research and technology previously pioneered by the institute.

The widespread adoption of this clay technology could lead to significantly lower seafood prices by protecting aquaculture stocks from mass die-offs. In the future, this approach may be scaled for use in local reservoirs to maintain safer water quality for municipal use.

The takeaway

Proactive monitoring and the deployment of charge-modified clay treatments provide a robust defense against the rapid spread of toxic algae. Scientists encourage local coastal authorities to prioritize these early-warning systems to minimize the economic damage caused by recurring environmental blooms.