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Investigation of heavy metals on the water samples from Kura and Araks Rivers

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The Fifth Conference “ Nuclear Science and Its Application”, 14-17 October 2008

INVESTIGATION OF HEAVY METALS ON THE WATER SAMPLES FROM

KURA AND ARAKS RIVERS

M.M. AHMADOV. B.A. SULEYMANOV, F.Y. HUMBATOV, K.S.SAFAROVA Institute of Radiation Problems, Azerbaijan National Academy o f Sciences, 3 la, H Jav id avenue, Baku, Azerbaijan 37014, e - mail: amajid@mail.ru

The Kura and Araks rivers are main water artery of Azerbaijan Republic. In republic, the Kura and Araks rivers water are widely used for drinking and industrial water supply o f a num ber o f cities and large occupied items, irrigation pisciculture and fishery, cultural - improving purposes. The basic part o f need o f branches o f a national economy o f republic is satisfied with water o f the Transit Rivers, main o f which the Kura and her inflows are. On territory o f republic, water the Kura and her inflows act from the polluted territories o f the next republics, Armenia and Georgia. The pollution of waters the Kura in territories o f Georgia is mainly carried out by large industrial cities, which dump industrial and domestic-household drains (chemical combine, metallurgical and cement factory).

The most intensive sources are located in territory o f Armenia and pollution o f waters basically is carried out running in Araks by the rivers Axuryan, Sevdjur, Kasaka, Razdan etc., where industrial cities and the village occupied items dump(reset) industrial and domestic-household drains. All these polluting factors are reflected in chemical structure o f water the Kura and Araks, which are widely used at life of the Azerbaijan people.

The above listed factors and increased risk o f pollution o f waters pool the Kura-Araks realizes by the large economic project, such as the construction oil pipe line to a Baku - Supsa, Baku -Tbilisi-Ceyhan in connection with constant growth o f a level oil producing shows, that the basic research o f an ecological condition the Kura and Araks, is a urgent task now. The decision o f some o f these tasks was one o f the purposes o f the international project “Monitoring o f the rivers o f Southern Caucasus” under the program o f NATO - OSCE « a Science for Peace «, one participant, from which is o f Azerbaijan on behalf o f Institute o f Radiation Problem NAS o f Azerbaijan.

In the present work the concentrations o f some heavy metals in the dissolved form and its concentrations in suspended particulate matter are investigated. The samples were collected by the special equipment «DURA BULL” intended for these purposes. After rinsing several times w ith river water o f vessel o f this equipment, the samples have collected on 15-20 sm o f a below o f surface o f water. Suspended particulate matter was separated by filtering water samples through 0.45-m preweighed Millipore filters, sealed in petri dishes and stored deep frozen. Filtered solutions were acidified to 0.2% (v/v) using concentrated nitric acid.

The analysis: the analysis of heavy metals, carried out in AAS with Zeeman background corrector o f firm “Perkin Elmer” - AAnalyst 800, electrothermal atomization. Basic cations (Na +, K +, C a 2+ and M g 2+) defined in the device AAS - SpectrAA 220 FS with flame atomization.

The protocol o f the control o f qualities carried out by measurement o f blank solutions, analytical duplicate, and solutions received with Matrix spike and certificated reference by a material for surface waters, received from Kingdoms o f Norway.

It has been sown that trace metals in rivers Kura and Araks are predominantly carried by suspended particles and only small fraction is transported in soluble form.

M ore wide spans we have discovered for As and Mn. M ost o f elevated concentration o f As were registered in Araks River - with mean value 11.82 ug/L, in the meantime mean concentration o f as in K ura<l ug/L

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