Barium belongs to IIa group of Periodic table of the elements and in group of alkaline-earth metals. Famous compounds are barium-sulphate and barium-carbonate, which are not soluble in water. It is using in industry of paints, papers, ceramics, glass, special cement, diagnostic with radiograph, naphtha boreholes, fluids, rubber, linoleum and poison for rats. Still, barium origin in water is from natural sources.
Origin in water
It is finding in limestone, sandstones and sometimes in soil. Barium is present in tracks in igneous and sedimentary rocks. It can come on surface with mining (naphtha, coal), and in the air with burning (aviation, diesel) or during the production process. Barium content in waters is in micrograms. High contents of this element are in deep salt waters with big mineralization.
Barium is appropriate for using if is in salts, which are not soluble in water.
Because of characteristic, that in organism does not absorb and does not metabolize, BaSO4 practically is not poisonous. It poorly admits roentgen rays, so it is useful for visualization every segments of digestive channel, from gullet to rectum, as good contrast mean. In thin layer, in shape of particles, it covers gullet, belly and intestine and gives plastic and acrid roentgen picture.
Barium is poison if is in shape of salts which are not soluble. Acute contact with barium can bring to gastrointestinal, nerve-muscular and carpological problems to people and animals. Long contact with barium at animals is connecting with hypertension and cardiotoxication. On laboratory animals barium causes nephropathies, and at people is possible cause of hypertension.
Maximal allowable concentrations
According to recommendations of EU (Directive 98/83/EC) barium is not following like parametar. According to our rules for drinking water (Sl. list SRJ 42/98), limitary value for copper is 0,7 mg/1.