Review on the physical chemistry of iodine transformations in the oceans

The transformation between iodate ( IO3− ), the thermodynamically stable form of iodine, and iodide (I - kinetically has received much attention because these species are often dependent on oxygen concentration, which ranges from saturation to non-detectable in ocean. As suboxic conditions ocean’s major minimum zones indicate that id="im1">IO3− is minimal or non-detectable, incorporation id="im2">IO3− into carbonate minerals been used as a redox proxy determine O 2 state Here, I look at one two electron transfers iodine with variety oxidants reductants show thermodynamics transformations. id="im3">IO3− id="im4">IO2− conversion shown be controlling step reduction reaction sequence due thermodynamic considerations. id="im5">IO3− id="im6">IO2− more favorable than id="im7">NO3− id="im8">NO2− oceanic pH values, there no need for nitrate reductase id="im9">IO3− other (e.g. Fe 2+ , Mn ) dissimilatory id="im10">IO3− by microbes during organic matter decomposition can affect transformation. Unfortunately, dearth information kinetics id="im11">IO3− ; thus, calculations suggest avenues research. Conversely, significant oxidation various species. In environment, oxidation. lead id="im12">IO3− reactive 3 •OH being most potent well sedimentary oxidized Mn, occurs lower ocean waters. Recent work oxidizing bacteria also id="im13">IO3− . facile sea surface microlayer atmosphere