Products of eruption of volcanoes and their influence on an organism. The inquirywater steam, dioksid carbon (˝O2), oksid carbon (˝O), nitrogen (N2), dioksid brimstones (SO2), oksid brimstones (SO), gaseous brimstone (S2), hydrogen (H2), ammonia (NH3), chloride hydrogen (H˝l), fluoric hydrogen (HF), hydrogen sulphide (H2S), methane (˝H4), boric acid (H3BO3), chlorine (˝l), argon (Ar), transformed H2O and Đ╬2. 2 there are chlorides of alkaline metals and iron. The structure of gases and their concentration depend on temperature and from earth crust type, therefore they can change within one volcano.
the Volcanic gases allocated with volcanoes of NE type, rise in atmosphere and usually do not cause harm, however partially they can come back to a surface of the earth in the form of acid rains.
Volcanoes can let out a significant amount of poisonous gases EVN in intervals between eruptions.
One of the most harmful gases is dioxide of brimstone which possesses a caustic smell and EVN at small concentration irritates mucous membranes of a nose, a throat and eyes. Brimstone dioxide can extend on considerable distance from its source. Gas reacts W damp air, forming tiny drops of sulfuric acid. These drops are so small that contain in air in the form of a thin suspension during vaguely long time. The aerosol of sulfuric acid can form a volcanic smog, quality of air thus falls often below standards. The vegetation dries up on a root, and rain water becomes acid, polluting potable water.
Ftorovodorod and hydrogen sulphide
Despite obvious harm 4 health, in the world yet was not the proved cases of ádestruction of people from - for direct influences of dioxide of brimstone. The same concerns 2 ftorovodorodu, to other widespread volcanic gas which can be absorbed in particles of ashes and becomes the reason ftorovogo cattle poisonings. So, fluorine connections are grasped peplovymi by particles, and at loss of the last on a terrestrial surface infect pastures and reservoirs, calling a cattle serious illness. Open sources of water supply of the population can be in the same way polluted.
Vulkanogennyj hydrogen sulphide, gas W a smell of rotten eggs, caused ádestruction of several people. Hydrogen sulphide is formed there where the part of flying sulfuric steams avoids oxidation and does not turn to brimstone dioxide. It is heavier than air and gathers in natural deepenings where the Most part of victims of volcanic gases represents serious danger
it is necessary on a share of carbonic gas. As well as hydrogen sulphide, it is heavier than air and at passive decontamination can collect in life-threatening concentration. In usual air contains about 0,5 % of carbonic gas, and in air which we exhale, approximately twice it is more. However if concentration of carbonic gas in air which we are urged to breathe, reaches 7,5 %, it leads to drowsiness and a headache. The first documentary CFMed deadly incident has occurred in 1979 around a volcanic complex of Deng on island Java (Indonesia). Here 149 persons who were seeking safety in flight from freaticheskogo of eruption, were lost in the invisible cloud of carbonic gas floating at them on a way. It is considered that gas has escaped from an underground trap from - for the seismic pushes connected with eruption.
Liquid volcanic products represent the lava which has left on a surface.
Character effuzivnyh eruptions, the form and extent of lava streams is defined by a chemical compound, viscosity, temperature, the maintenance of flying substances.
the Firm breeds formed at cooling of a lava, contain basically dioksid silicon, oksidy aluminium, iron, magnesium, calcium, sodium, potassium, the titan and water. Usually in lavas the maintenance of ANY1 of these components exceeds one percent, and many other elements are present at smaller quantity.
Structure of a lava of a volcano of Ejjafjatlajokudl
Dioksid of silicon (SiO2) - 46,99
Oksid of aluminium (Al2O3) - 15, 91
(FeO) - 12,12
Oksid of manganese (MnO) - 0,19
Oksid of magnesium (MgO) - 6,55
Oksid of calcium (˝aO) - 10,28
Oksid of sodium (Na2O) - 3,11
Oksid of potassium (K2O) - 0,71
Dioksid of the titan (TiO2) - 3,32
Oksid of phosphorus (P2O5) - 0,64
Firm volcanic products are formed by Oksid of iron at exclusive explosive eruptions.
volcanic bombs (the stiffened emissions of a liquid lava), the size 6 sm and more are thus formed. Congestions of volcanic bombs - agglomerates.
Lapikki (" a ball ") - The sizes 1 - 5 sm - smaller products of emission - volcanic sand, ashes and a dust. Last is carried on thousand in km.
Explosions split up and throw out already hardened volcanic breeds and spray a liquid lava, forming tufy which sizes from 1 - 2 add mm.