Research Background Global climate change, particularly global warming, has exerted immense pressure on the global carbon cycle. As a significant carbon sink, the ocean absorbs large amounts of carbon dioxide (CO₂), leading to ocean acidification, which adversely affects marine organisms reliant on carbonate minerals. Coastal wetlands, such as inte...

Iodine (I) is a trace element of significant importance to human health and the environment. It is a major component of human thyroid hormones, such as thyroxine (T4) and triiodothyronine (T3), directly influencing thyroid function. However, approximately 1.9 billion people worldwide are affected by Iodine Deficiency Disorder (IDD), with symptoms i...

Iron is one of the most abundant elements on Earth, widely present in the Earth’s crust, water bodies, and living organisms. The redox reactions of iron in natural cycles, especially in water bodies, play a crucial role in nutrient cycling and pollutant degradation in ecosystems. However, the mechanisms of iron cycling and its interaction with micr...

Uranium (U) is a radioactive element widely present in the environment, primarily existing in its hexavalent (U(VI)) and tetravalent (U(IV)) oxidation states. Under oxidizing conditions, U(VI) is the dominant stable form, while under reducing conditions, U(VI) can be reduced to U(IV). This reduction process can occur through abiotic pathways (e.g.,...

Molybdenum (Mo) is one of the most abundant trace metals in the ocean, and its distinct behavior under different redox conditions makes it an effective indicator of paleoceanographic redox conditions. Particularly in anoxic and sulfidic environments, the speciation and behavior of Mo differ significantly from those in oxic environments. However, th...