Hydro–chemical and hydro–biological research of the water from the Rioni

Volume : VIII, Issue : V, May - 2018

Manuchar Chikovani, Manoni Gabelashvili

We have studied hydro–chemical and microbiological condition of the Rioni in Kutaisi. The Rioni is the largest river

which flows through the whole territory of Georgia. It starts on south slopes of Caucasus Mountain on Mount Phasis and

flows into the Black Sea near Poti. There are several cities on the river banks, including Kutaisi. Due to maltreat by the population the river is

polluted while flowing through the city. The water from the Rioni is a main healthcare point of the city population and its sanitary norms have a

great practical importance. The water contains some organic substances that create favorable conditions for development of micro organisms.

Combination of nitrate with food and water can have toxic influence on human being.

We have studied chemical and microbiological characteristics of the river water in Kutaisi first in 2011, 2013 near the White Bridge and then in

2014 near both ends of Kutaisi. All the approved methods have been used in hydro–chemical analysis. In order to find microbiological pollution

intestinal stick Escherichiacoli is identified, its existence shows us the Contamination index of the water with fecal masses.

We have measured the content of particles, sulfates, and mineralization and oil products in the water with the help of classical gravimetric

method. Mg2+ and Ca2+ ions have been identified with easy fast and good replication complex monetric method, Cl– ion with mercurrimetric

method, HCO – ions with acidometric method, biogenic substances (NH + with sodium salicycate, but NO – with Gress reaction) colour and overall 3 4 2

iron was defined with photometric methods.

Oxygen dissolved in water and biological consumption of oxygen with iodometric method, chemical consumption of oxygen with

permanganatometric and bichromatic method. The acidity index has been defined with potenciometric method. The experiment suggested that

the concentration of above mentioned ions and lactozopositive intestine in the water exceeds the permissible norms. The analyses results clearly

indicate that Kutaisi has the greatest fault in the water pollution because open utility sewage flows into the Rioni.

Generally microbiological pollution can be assessed as epidemiologically safe.