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Tin

The Tin, symbol Sn (from the Latin Stannum ) Is a chemical element atomic number 50 located in Group 14 of the periodic table elements.

is a very abundant metal in Earth's crust. Its principal ore is cassiterite, but can also be obtained from the estannina and cylindrite .

He became a metal exploded in various parts of the Shire of Villuercas Ibores Jara such as in Minas tin (cassiterite) from Cerro de San Cristobal .

ORIGIN

This metal was used in the form of bronze from III of the millennium, but as metal has not been known until the early centuries of our era. During the medieval period was an affordable substitute to make silver tableware and decorative objects.

CHARACTERISTICS OF TIN

is a silvery metal, malleable , not oxidized easily and is resistant to corrosion . Is found in many alloys and used to coat other metals to protect them from corrosion. One of its most striking features is that under certain conditions forms the tin plague. By bending a metal bar that produces a characteristic sound called tin cry , produced by the friction of the crystals that compose it.

ENVIRONMENTAL EFFECTS OF TIN

as simple tin atom or molecule is not very toxic for any type of organism. The toxic form is the organic form. Organotin compounds can remain in the environment for long periods of time. They are very persistent and not readily biodegradable . Microorganisms have many difficulties in breaking organotin compounds that have accumulated in soil water over the years. Organotin concentrations still increase because of this. The

organotins can spread through water systems where particles are absorbed by plants. Are known to cause much damage to aquatic ecosystems because they are very toxic to fungi, algae and phytoplankton . The phytoplankton is a very important link in the aquatic ecosystem, providing oxygen to aquatic organisms. It is also a important part of the aquatic food chain.

There are many different types of organic tin can vary widely in toxicity. Tributyl tins tin compounds are more toxic to fish and fungi, while tin triphenols is much more toxic to phytoplankton .

is known that organotins alter the growth, reproduction, enzyme systems and power schemes of aquatic organisms. The exhibition takes place primarily in upper layer of water, and that's where organotin compounds accumulate.