Dissolved metals are metallic elements present in aqueous systems predominantly as hydrated ions or inorganic/organic complexes that pass through a defined filter pore size (commonly 0.45 μm). In environmental and geochemical research, they comprise species such as Fe, Mn, Cu, Zn, Pb, and others in true solution, excluding particulate or colloid-bound forms above the operational cutoff. Their speciation is governed by pH, redox potential, complexing ligands, and ionic strength, which in turn control mobility, bioavailability, and toxicity. Quantification typically uses techniques such as ICP-MS or ICP-OES after filtration and, in some protocols, acid preservation to maintain metals in dissolved form.
The byproducts of modern society appear to be messing with the love life of two tiny fish species that have long coexisted in Mexican rivers.
Plants & Animals
13 hours ago
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7
Over recent decades, harmful algal blooms have become increasingly common. These blooms often consist of bacteria called "cyanobacteria" in freshwater ecosystems. They can produce debilitating toxins, suffocate marine life ...
Long-term conservation policies may help restore freshwater ecosystems and prevent extreme species loss, new research suggests.
Ecology
Jun 26, 2026
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Thawing permafrost is rapidly transforming dozens of Arctic streams into acidic, metal-laden waterways, according to new research published in Science. The study shows how thawing permafrost exposes sulfide minerals that ...
Earth Sciences
May 22, 2026
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A collaborative team of scientists has discovered that life on Earth over three billion years ago relied on the metal molybdenum, which was incredibly scarce in the environment at the time. The study, published in Nature ...
Astrobiology
May 5, 2026
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155
How much of the essential trace element iron remains available for marine life in the ocean depends critically on the diversity of organic molecules in seawater, according to new research published in Nature Communications ...
Earth Sciences
Apr 28, 2026
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The bottom sediment of water bodies is an archive of all human activity. It is a reservoir of nutrients but also of harmful substances—and it can also turn into a source of emissions. "Most lakes tend to be remediated due ...
Environment
Mar 25, 2026
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In Science of The Total Environment, researchers demonstrate the broad distribution of particulate thiols in the western North Pacific and show that their main source is marine phytoplankton. The analysis indicates that differences ...
Earth Sciences
Mar 22, 2026
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Deep-sea waters are warming due to heat waves and climate change, and it could spell trouble for the oceans' delicate chemical and biological balance. However, a study published in Proceedings of the National Academy of Sciences ...
Cell & Microbiology
Mar 9, 2026
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172
The Baltic Sea is one of the world's most oxygen-depleted major bodies of water. The reason is excessive concentrations of phosphorus, an element essential for life—and an important ingredient in fertilizer. New research ...
Biotechnology
Feb 22, 2026
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