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.
Ancient single-celled red algae that thrive in scalding, acidic waters are emerging as far more than specialized survivors.
Evolution
Jul 29, 2026
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When a local community gets involved in environmental monitoring, its efforts can build awareness of local environmental issues and provide more abundant data than scientists can collect on their own. But how does the quality ...
Environment
Jul 20, 2026
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A new study published in Nature Communications reveals a hidden source of antibiotic resistance, providing an early warning sign for researchers and public health officials.
Cell & Microbiology
Jul 16, 2026
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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
Jul 1, 2026
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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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