Mystery of Metal-Rich Nanoparticle Clouds in the Black Sea Solved
METU researchers have uncovered the formation mechanism of metal-laden nanoparticle clouds extending 150 kilometers offshore from the Sakarya River in the Black Sea.
Experts from the Middle East Technical University Institute of Marine Sciences have unraveled the mystery of iron- and manganese-heavy nanoparticle clouds extending up to 150 kilometers offshore from the Sakarya River in the Black Sea, using scientific expeditions and new technologies.
Details of the Scientific Expedition
Scientists from the Middle East Technical University Institute of Marine Sciences carried out a comprehensive, week-long scientific summer expedition in the Black Sea during the last week of August.
During this expedition, the physical, chemical, and biological properties of seawater were examined in detail, while invisible metal-heavy particle clouds were mapped.
Technological Developments and Monitoring
Assoc. Prof. Dr. Mustafa Yücel stated that they have been closely monitoring this marine formation for seven to eight years.
Thanks to modern technologies developed over the past three years with the support of the European Research Council, these processes have been investigated in greater detail.
Formation at the Anoxic Boundary
The research was conducted along a line located approximately 150 kilometers offshore from the area where the Sakarya River empties in the western Black Sea.
It was reported that the Black Sea possesses the world's largest anoxic marine volume below a depth of about 100 meters, and that special microbial reactions take place at this boundary.
Metal Diversity and Concentration
Analyses revealed that iron and manganese concentrations were extremely high, while metals such as copper, zinc, tungsten, and molybdenum were also detected.
It was emphasized that these particles are in the micro- and nano-size range and do not cause any visible color change in the water.
Risk for Economic Species
Prof. Dr. Mustafa Yücel pointed out that metal-induced pollution may not be limited to the coast alone.
It was stated that in the event of increased vertical mixing of water due to climate change and storms, these metal-rich clouds could approach the surface and become toxic to economically valuable living species.
Contribution to Space Sciences
It was stated that the findings provide critical data not only for marine sciences but also for nanotechnology, materials science, and space sciences.
It was noted that the mechanisms of the Black Sea, which bear similarities to the dark and oxygen-free environments of oceans in the Solar System, will also support space research.