What's The Difference Between 'Metal Speciation And A'?

35. What is the difference between a '' and a ''? Describe what metal speciation is. How do the master variables of the environment relate to speciation? Why is speciation important in contaminant transport and in biological contexts? If you had to pick a third “master” variable, what would it be? Why is chemistry vital to understanding biological systems? Species refers to the form that a metal takes in the environment. This form can be a cation (ex: Fe2+) or anion form (ex: N3-), or just a bonded form (ex: Fe2O3). Metal speciation, then, refers to the determination of the distribution of these species for a certain metal. The master variables (temp and pH) both influence speciation. Temp influences speciation because it can change the environment’s
What is the difference between a'smart' and a'smart'? Addison Hansen is studying the chemistry of a massive, alkaline (pH 11) tailings pond at a nearby coal mine. In the pond, there is an intense pH gradient between the surface and bottom. The surface tends to be significantly more acidic than the bottom, which changes the way that metals move through the solution. Many of the ponds are protected from rainfall or runoff from the surrounding area, but the pH gradient persists. Why do you need to be a member? o This lake is probably stratified, which means that “layers” of water in the lake have different properties, like temperature and water chemistry, and that these layers do not mix. o Across these layers, pH can change, and be unique in each layer, creating a pH gradient. o This pH gradient could exist because of a few factors: Closer to the surface, organisms (like fish, frogs, microbes, etc.) are more common than the. These organisms do respiration, which uses oxygen and produces CO2. CO2 is able to react with water to form carbonic acid, which can dissociate and release H+. This makes the layers closer to the surface more acidic. Closer to the surface, the water is warmer (due to warmer input water and sunlight). This can change the speciation and solubility of compounds present in the water. This specific speciation and solubility of these compounds/metals/minerals could be more acidic or allow for H+ ions to dissociate (increasing acidity) in these conditions, while this wouldn’t occur in deeper water where it’s colder. Even though the ponds are protected from runoff, sulfide minerals/metals from the tailings are in the pond already. These typically result in acidic drainage when they oxidize. As these minerals/metals get closer to the surface, the oxygen content of the pond increases due to both proximity to the surface, and macrophytes producing oxygen. As you get closer to the surface and the environment becomes less anoxic, these metals/minerals